UNITED STATES
                    SECURITIES AND EXCHANGE COMMISSION
                          Washington, D.C. 20549

                                FORM N-CSR

          CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT
                           INVESTMENT COMPANIES


Investment Company Act file number 811-06196
                                   811-21298

Name of Fund:  CMA Treasury Fund
               Master Treasury Trust

Fund Address:  P.O. Box 9011
               Princeton, NJ  08543-9011

Name and address of agent for service:  Robert C. Doll, Jr., Chief Executive
       Officer, CMA Treasury Fund and Master Treasury Trust, 800 Scudders Mill
       Road, Plainsboro, NJ, 08536.  Mailing address:  P.O. Box 9011,
       Princeton, NJ, 08543-9011

Registrant's telephone number, including area code:  (609) 282-2800

Date of fiscal year end: 03/31/06

Date of reporting period: 04/01/05 - 03/31/06

Item 1 -   Report to Stockholders


Annual Report
March 31, 2006


CMA Treasury Fund


(BULL LOGO) Merrill Lynch Investment Managers
www.mlim.ml.com


Mercury Advisors
A Division of Merrill Lynch Investment Managers
www.mercury.ml.com


This report is not authorized for use as an offer of sale or a solicitation
of an offer to buy shares of the Fund unless accompanied or preceded by the
Fund's current prospectus. An investment in the Fund is not insured or
guaranteed by the Federal Deposit Insurance Corporation or any other
government agency. Although the Fund seeks to preserve the value of your
investment at $1.00 per share, it is possible to lose money by investing in
the Fund. Past performance results shown in this report should not be
considered a representation of future performance, which will fluctuate.
Refer to www.mlim.ml.com to obtain performance data current to the most
recent month-end. Statements and other information herein are as dated and
are subject to change.

A description of the policies and procedures that the Fund uses to determine
how to vote proxies relating to portfolio securities is available (1)
without charge, upon request, by calling toll-free 1-800-637-3863; (2) at
www.mutualfunds.ml.com; and (3) on the Securities and Exchange Commission's
Web site at http://www.sec.gov. Information about how the Fund voted proxies
relating to securities held in the Fund's portfolio during the most recent
12-month period ended June 30 is available (1) at www.mutualfunds.ml.com and
(2) on the Securities and Exchange Commission's Web site at http://www.sec.gov.


CMA Treasury Fund
Box 9011
Princeton, NJ 08543-9011


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CMA Treasury Fund


Announcement to Shareholders


On February 15, 2006, BlackRock, Inc. ("BlackRock") and Merrill Lynch & Co.,
Inc. ("Merrill Lynch") entered into an agreement to contribute Merrill Lynch's
investment management business, Merrill Lynch Investment Managers, L.P. and
certain affiliates (including Fund Asset Management, L.P. and Merrill Lynch
Investment Managers International Limited), to BlackRock to create a new
independent company that will be one of the world's largest asset management
firms with over $1 trillion in assets under management (based on combined
assets under management as of March 31, 2006). The transaction is expected to
close in the third quarter of 2006, at which time the new company will operate
under the BlackRock name. If approved by the Fund's Board of Trustees and Fund
shareholders, the combined company that results from the transaction is
expected to become the investment adviser of the Fund.



Important Tax Information


Of the ordinary income distributions paid by CMA Treasury Fund during the year
ended March 31, 2006, 98.65% was attributable to federal obligations.
Additionally, at least 50% of the assets of the Fund was invested in federal
obligations at the end of each fiscal quarter.

The law varies in each state as to whether and what percentage of dividend
income attributable to federal obligations is exempt from state income tax. We
recommend that you consult your tax adviser to determine if any portion of the
dividends you received is exempt from state income taxes.

The following information is provided with respect to the ordinary income
distributions paid by CMA Treasury Fund for the fiscal year ended March 31,
2006:


        Interest-Related Dividends for Non-U.S. Residents

Month Paid:   April 2005 - December 2005                    99.25%*
              January 2006 - March 2006                     97.38%*


    Qualified Short-Term Capital Gains for Non-U.S. Residents

Month Paid:   April 2005 - December 2005                     0.39%*

 * Represents the portion of the taxable ordinary income dividends
   eligible for exemption from U.S. withholding tax for nonresident
   aliens and foreign corporations.



Availability of Quarterly Schedule of Investments


The Fund files its complete schedule of portfolio holdings with the Securities
and Exchange Commission ("SEC") for the first and third quarters of each fiscal
year on Form N-Q. The Fund's Forms N-Q are available on the SEC's Web site at
http://www.sec.gov. The Fund's Forms N-Q may also be reviewed and copied at the
SEC's Public Reference Room in Washington, DC. Information on the operation of
the Public Reference Room may be obtained by calling 1-800-SEC-0330.



Electronic Delivery


The Fund offers electronic delivery of communications to its shareholders. In
order to receive this service, you must register your account and provide us
with e-mail information. To sign up for this service, simply access this Web
site at http://www.icsdelivery.com/live and follow the instructions. When you
visit this site, you will obtain a personal identification number (PIN). You
will need this PIN should you wish to update your e-mail address, choose to
discontinue this service and/or make any other changes to the service. This
service is not available for certain retirement accounts at this time.



CMA TREASURY FUND                                                MARCH 31, 2006



A Letter From the President


Dear Shareholder

You may be aware that changes are on the horizon at Merrill Lynch Investment
Managers ("MLIM"). On February 15, 2006, Merrill Lynch announced plans to
combine the firm's investment advisory business, including MLIM, with another
highly regarded investment manager - BlackRock, Inc. ("BlackRock").

We believe this merger of asset management strength will benefit our
investors. MLIM is a leading investment management organization with over
$576 billion in assets under management globally and 2,757 employees in 17
countries. It offers over 100 investment strategies in vehicles ranging
from mutual funds to institutional portfolios. BlackRock is one of the
largest publicly traded investment management firms in the United States with
$463.1 billion in assets under management and 1,839 employees. It manages
assets on behalf of institutional and individual investors worldwide through a
variety of equity, fixed income, liquidity and alternative investment products.

At the completion of the transaction, which is expected in the third quarter
of this year, the resultant firm will be a top-10 investment manager worldwide
with over $1 trillion in assets under management.* The combined company will
provide a wider selection of high-quality investment solutions across a
range of asset classes and investment styles. MLIM and BlackRock possess
complementary capabilities that together create a well-rounded organization
uniting some of the finest money managers in the industry. At the same time,
the firms share similar values and beliefs - they are focused on delivering
excellence on behalf of clients, and both make investment performance their
single most important mission. In short, the merger only reinforces our
commitment to shareholders.

Most of MLIM's investment products - including mutual funds, separately
managed accounts, annuities and variable insurance funds - eventually will
carry the "BlackRock" name. As a shareholder in one or more MLIM-advised
mutual funds, you will receive a proxy package in the coming weeks in
connection with this transaction. After you receive this information, should
you have any questions or concerns, do not hesitate to contact your financial
advisor.

As always, we thank you for entrusting us with your investment assets, and we
look forward to continuing to serve your investment needs with even greater
strength and scale as the new BlackRock.



Sincerely,



(Robert C. Doll, Jr.)
Robert C. Doll, Jr.
President and Chief Investment Officer
Merrill Lynch Investment Managers


 * $1.039 trillion in assets under management as of March 31, 2006.
   Data, including assets under management, are as of March 31, 2006.



CMA TREASURY FUND                                                MARCH 31, 2006



A Discussion With Your Fund's Portfolio Manager


We maintained a relatively conservative approach as the Federal Reserve Board
continued raising interest rates and the supply of short-term Treasury issues
declined.


How did the Fund perform during the fiscal year in light of the existing
market conditions?

For the 12-month period ended March 31, 2006, CMA Treasury Fund paid
shareholders a net annualized dividend of 2.77%. For the six-month period
ended March 31, 2006, the Fund paid shareholders a net annualized dividend
of 3.29%. The Fund's seven-day yield as of March 31, 2006 was 3.73%.

The Fund's average portfolio maturity at March 31, 2006 was 35 days. This
compared to 60 days at September 30, 2005 and 48 days at March 31, 2005.

We employed a barbell strategy for some time, but were not inclined toward
that approach during the past year. Our appetite for longer-dated securities
waned as it became apparent that the Federal Reserve Board (the Fed) was not
through with its interest rate-hiking campaign. Under these circumstances, our
goal was to capture the greatest relative value that the market had to offer
at a particular point in time.

The Fed advanced its monetary tightening campaign with eight quarter-point
interest rate hikes during the 12-month period. This brought the federal
funds rate to 4.75% by period-end. The central bank - focused on combating
inflationary fears as energy prices moved higher - continued to raise interest
rates despite the untold economic damage wrought by the summer hurricanes. In
October, Dr. Ben Bernanke was named as the future replacement of longtime Fed
Chairman Alan Greenspan, and investors began to anticipate that perhaps the
measured interest rate-hiking campaign would soon come to an end. Although
investors did remove the critical word "measured" from the description of its
monetary tightening program, Bernanke's official induction in January was
accompanied by a quarter-point interest rate hike, followed by another on
March 28. Many observers predict that the Fed will tighten again at its
meeting in May.

In terms of supply, issuance of short-dated Treasury bills during the period
was lower than one year ago. Recently, the U.S. Treasury's focus has been on
the issuance of longer-dated securities, particularly with the reissuance of
the 30-year Treasury bond in February. The Treasury had stopped issuing the
long bond in 2001. The limited supply on the short end meant that prices were
at times elevated.

Finally, it is worth commenting on the shape of the Treasury yield curve.
After flattening dramatically during the course of the Fed's interest rate-
hiking campaign, the curve toyed with intermittent bouts of inversion
throughout the early months of 2006. At March 31, 2006, the curve was
relatively flat, with the six-month Treasury bill yielding 4.81%, while the
two-year Treasury note, the 10-year Treasury note and the 30-year Treasury
bond yielded 4.82%, 4.86% and 4.90%, respectively.


How did you manage the portfolio during the fiscal year?

The Fund's average portfolio maturity reached a high of 65 days and a low of
35 days during the year. As the Fed tirelessly advanced its monetary
tightening policy, we were reluctant to pursue longer-dated money market
issues and focused primarily on capturing the greatest relative value at the
short end of the Treasury curve. This meant evaluating yields available in the
one-, three- and six-month sectors in an effort to enhance income and total
return potential within a fairly conservative framework. We also remained
cognizant of supply issues that intermittently caused prices on one-month
bills to become expensive.

While we generally wanted to avoid locking into longer securities as interest
rates steadily rose, we did selectively participate in the nine-month to one-
year sectors as yield-enhancement opportunities presented themselves. Notably,
we were able to take advantage of opportunities in these sectors in November
and December, when the market began to speculate that perhaps the Fed was
nearing the end of its interest rate-hiking campaign. We reverted back to a
more conservative approach shortly after Dr. Bernanke assumed the role of Fed
Chairman and monetary tightening moved forward uninterrupted.



CMA TREASURY FUND                                                MARCH 31, 2006



As is customary at calendar year-end, the Fund received heavy inflows as
investors shifted assets to Treasury funds for year-end tax advantages. Thus,
we began to target maturities in January and February, avoiding issues
maturing in December. Much of the new money was redeemed in January, so our
strategy in the final quarter of the fiscal year involved carefully managing
amid the asset flows in and out of the portfolio.


How would you characterize the portfolio's position at the close of the
period?

We maintained ample liquidity at period-end and would characterize our
position as cautiously optimistic. We believe the end of the Fed's tightening
cycle is within sight, perhaps toward summer, which could eventually give us
cause to become more aggressive.

Overall, the housing market still shows signs of decline, fears of increasing
gasoline prices still loom for summer travelers, and the market has yet to see
the type of explosive employment growth that would accompany projected 5%
gross domestic product growth in the first quarter. All of these variables
have been reflected in a decline in consumer confidence.

On the supply side, record U.S. deficits are expected to translate into
increased debt issuance, although we believe most of the supply will continue
to be skewed toward the long end. We anticipate that some of the Treasury's
needs will be met by higher tax receipts both on the corporate and individual
levels. However, if the economy slows, resulting in a downturn in tax
receipts, we would expect front-end issuance to increase.

Under these conditions, we intend to maintain our relatively conservative
approach in the immediate term. We will continue to monitor the economic data
and the yield curve for signs that a Fed pause is imminent, which would give
us greater reason to extend the portfolio's maturity.

The Trust's portfolio composition, as a percent of net assets, at the end of
March and as of our last report to shareholders is detailed below:


                                     3/31/06         9/30/05

U.S. Government Obligations            99.0%           98.7%
Other Assets Less Liabilities           1.0             1.3
                                      ------          ------
Total                                 100.0%          100.0%
                                      ======          ======


Cindy V. Macaulay
Vice President and Portfolio Manager

April 11, 2006



CMA TREASURY FUND                                                MARCH 31, 2006



Disclosure of Expenses


Shareholders of this Fund may incur the following charges: (a) expenses
related to transactions, including sales charges, redemption fees and exchange
fees; and (b) operating expenses including advisory fees, distribution fees
including 12b-1 fees, and other Fund expenses. The following example (which is
based on a hypothetical investment of $1,000 invested on October 1, 2005 and
held through March 31, 2006) is intended to assist shareholders both in
calculating expenses based on an investment in the Fund and in comparing these
expenses with similar costs of investing in other mutual funds.

The first table below provides information about actual account values and
actual expenses. In order to estimate the expenses a shareholder paid during
the period covered by this report, shareholders can divide their account value
by $1,000 and then multiply the result by the number in the first line under
the heading entitled "Expenses Paid During the Period."

The second table below provides information about hypothetical account values
and hypothetical expenses based on the Fund's actual expense ratio and an
assumed rate of return of 5% per year before expenses. In order to assist
shareholders in comparing the ongoing expenses of investing in this Fund and
other funds, compare the 5% hypothetical example with the 5% hypothetical
examples that appear in other funds' shareholder reports.

The expenses shown in the table are intended to highlight shareholders'
ongoing costs only and do not reflect any transactional expenses, such as
sales charges, redemption fees or exchange fees. Therefore, the second table
is useful in comparing ongoing expenses only, and will not help shareholders
determine the relative total expenses of owning different funds. If these
transactional expenses were included, shareholder expenses would have been
higher.




                                                                                                 Expenses Paid
                                                              Beginning           Ending       During the Period*
                                                            Account Value     Account Value     October 1, 2005
                                                              October 1,        March 31,        to March 31,
                                                                 2005              2006               2006
                                                                                            
Actual

CMA Treasury Fund                                               $1,000          $1,016.30            $3.32

Hypothetical (5% annual return before expenses)**

CMA Treasury Fund                                               $1,000          $1,021.61            $3.33

 * Expenses are equal to the annualized expense ratio .66%, multiplied by the average account value
   over the period, multiplied by 182/365 (to reflect the one-half year period shown). Because the Fund
   is a feeder fund, the expense table reflects the expenses of both the feeder fund and the master trust
   in which it invests.

** Hypothetical 5% annual return before expenses is calculated by pro-rating the number of days in the
   most recent fiscal half year divided by 365.



CMA TREASURY FUND                                                MARCH 31, 2006



Statement of Assets and Liabilities                                                                             CMA Treasury Fund


As of March 31, 2006
                                                                                                         
Assets

       Investment in Master Treasury Trust (the "Trust"), at value (identified cost--$481,703,457)                $   481,784,935
       Prepaid expenses                                                                                                    29,206
                                                                                                                  ---------------
       Total assets                                                                                                   481,814,141
                                                                                                                  ---------------

Liabilities

       Payables:
           Administrator                                                                       $        92,395
           Distributor                                                                                  69,330
           Other affiliates                                                                              9,764            171,489
                                                                                               ---------------
       Accrued expenses and other liabilities                                                                              12,928
                                                                                                                  ---------------
       Total liabilities                                                                                                  184,417
                                                                                                                  ---------------

Net Assets

       Net assets                                                                                                 $   481,629,724
                                                                                                                  ===============

Net Assets Consist of

       Shares of beneficial interest, $.10 par value, unlimited number of shares authorized                       $    48,154,825
       Paid-in capital in excess of par                                                                               433,393,421
       Unrealized appreciation allocated from the Trust--net                                                               81,478
                                                                                                                  ---------------
       Net Assets--Equivalent to $1.00 per share based on 481,548,248 shares of beneficial
       interest outstanding                                                                                       $   481,629,724
                                                                                                                  ===============

       See Notes to Financial Statements.



CMA TREASURY FUND                                                MARCH 31, 2006



Statement of Operations                                                                                         CMA Treasury Fund


For the Year Ended March 31, 2006
                                                                                                         
Investment Income

       Interest from affiliates                                                                                   $       197,640
       Net investment income allocated from the Trust:
           Interest and amortization of premium and discount earned                                                    16,543,969
           Expenses                                                                                                   (1,267,525)
                                                                                                                  ---------------
       Total income                                                                                                    15,474,084
                                                                                                                  ---------------

Expenses

       Administration fees                                                                     $     1,223,899
       Distribution fees                                                                               582,297
       Registration fees                                                                                57,150
       Transfer agent fees                                                                              56,395
       Printing and shareholder reports                                                                 34,157
       Professional fees                                                                                25,944
       Other                                                                                             8,839
                                                                                               ---------------
       Total expenses                                                                                                   1,988,681
                                                                                                                  ---------------
       Investment income--net                                                                                          13,485,403
                                                                                                                  ---------------

Realized & Unrealized Gain Allocated from the Trust--Net

       Realized gain on investments--net                                                                                   28,578
       Change in unrealized appreciation on investments--net                                                               30,523
                                                                                                                  ---------------
       Total realized and unrealized gain--net                                                                             59,101
                                                                                                                  ---------------
       Net Increase in Net Assets Resulting from Operations                                                       $    13,544,504
                                                                                                                  ===============

       See Notes to Financial Statements.



CMA TREASURY FUND                                                MARCH 31, 2006



Statements of Changes in Net Assets                                                                             CMA Treasury Fund

                                                                                                     For the Year Ended March 31,
Increase (Decrease) in Net Assets:                                                                   2006               2005
                                                                                                         
Operations

       Investment income--net                                                                  $    13,485,403    $     5,836,826
       Realized gain--net                                                                               28,578             14,186
       Change in unrealized appreciation--net                                                           30,523          (231,083)
                                                                                               ---------------    ---------------
       Net increase in net assets resulting from operations                                         13,544,504          5,619,929
                                                                                               ---------------    ---------------

Dividends & Distributions to Shareholders

       Investment income--net                                                                     (13,485,403)        (5,836,826)
       Realized gain--net                                                                             (28,578)           (14,186)
                                                                                               ---------------    ---------------
       Net decrease in net assets resulting from dividends and distributions to shareholders      (13,513,981)        (5,851,012)
                                                                                               ---------------    ---------------

Beneficial Interest Transactions

       Net proceeds from sale of shares                                                          1,488,532,295      2,146,386,306
       Value of shares issued to shareholders in reinvestment of dividends and distributions        13,513,981          5,850,955
                                                                                               ---------------    ---------------
       Total shares issued                                                                       1,502,046,276      2,152,237,261
       Cost of shares redeemed                                                                 (1,622,654,458)    (2,223,173,925)
                                                                                               ---------------    ---------------
       Net decrease in net assets derived from beneficial interest transactions                  (120,608,182)       (70,936,664)
                                                                                               ---------------    ---------------

Net Assets

       Total decrease in net assets                                                              (120,577,659)       (71,167,747)
       Beginning of year                                                                           602,207,383        673,375,130
                                                                                               ---------------    ---------------
       End of year                                                                             $   481,629,724    $   602,207,383
                                                                                               ===============    ===============

       See Notes to Financial Statements.



CMA TREASURY FUND                                                MARCH 31, 2006



Financial Highlights                                                                                            CMA Treasury Fund


The following per share data and ratios have been derived                           For the Year Ended March 31,
from information provided in the financial statements.                2006         2005         2004        2003++         2002
                                                                                                     
Per Share Operating Performance

       Net asset value, beginning of year                         $     1.00   $     1.00    $     1.00   $     1.00   $     1.00
                                                                  ----------   ----------    ----------   ----------   ----------
       Investment income--net                                          .0277        .0094         .0040        .0111        .0248
       Realized and unrealized gain (loss)--net                        .0001      (.0004)       (.0001)      (.0004)        .0004
                                                                  ----------   ----------    ----------   ----------   ----------
       Total from investment operations                                .0278        .0090         .0039        .0107        .0252
                                                                  ----------   ----------    ----------   ----------   ----------
       Less dividends and distributions:
           Investment income--net                                    (.0277)      (.0094)       (.0040)      (.0111)      (.0248)
           Realized gain--net                                        (.0001)          --*       (.0001)      (.0001)      (.0003)
                                                                  ----------   ----------    ----------   ----------   ----------
       Total dividends and distributions                             (.0278)      (.0094)       (.0041)      (.0112)      (.0251)
                                                                  ----------   ----------    ----------   ----------   ----------
       Net asset value, end of year                               $     1.00   $     1.00    $     1.00   $     1.00   $     1.00
                                                                  ==========   ==========    ==========   ==========   ==========
       Total investment return                                         2.81%         .95%          .41%        1.11%        2.48%
                                                                  ==========   ==========    ==========   ==========   ==========

Ratios to Average Net Assets

       Expenses                                                     .67%++++     .66%++++      .63%++++     .61%++++         .61%
                                                                  ==========   ==========    ==========   ==========   ==========
       Investment income and realized gain--net                    2.76%++++     .94%++++      .43%++++    1.10%++++        2.43%
                                                                  ==========   ==========    ==========   ==========   ==========

Supplemental Data

       Net assets, end of year (in thousands)                     $  481,630   $  602,207    $  673,375   $1,297,550   $1,474,004
                                                                  ==========   ==========    ==========   ==========   ==========

         * Amount is less than $(.0001) per share.

        ++ On February 13, 2003, the Fund converted from a stand-alone investment company to a "feeder" fund that
           seeks to achieve its investment objective by investing all of its assets in the Trust, which has the
           same investment objective as the Fund. All investments will be made at the Trust level. This structure
           is sometimes called a "master/feeder" structure.

      ++++ Includes the Fund's share of the Trust's allocated expenses and/or investment income and realized gain--net.

           See Notes to Financial Statements.



CMA TREASURY FUND                                                MARCH 31, 2006



Notes to Financial Statements                                 CMA Treasury Fund


1. Significant Accounting Policies:
CMA Treasury Fund (the "Fund") is registered under the Investment Company Act
of 1940, as amended, as a no load, diversified, open-end management investment
company. The Fund seeks to achieve its investment objective by investing all
of its assets in the Master Treasury Trust (the "Trust"), which has the same
investment objective and strategies as the Fund. The value of the Fund's
investment in the Trust reflects the Fund's proportionate interest in the net
assets of the Trust. The performance of the Fund is directly affected by the
performance of the Trust. The financial statements of the Trust, including the
Schedule of Investments, are included elsewhere in this report and should be
read in conjunction with the Fund's financial statements. The Fund's financial
statements are prepared in conformity with U.S. generally accepted accounting
principles, which may require the use of management accruals and estimates.
Actual results may differ from these estimates. The percentage of the Trust
owned by the Fund at March 31, 2006 was 55.2%. The following is a summary of
significant accounting policies followed by the Fund.

(a) Valuation of investments--The Fund records its investment in the Trust at
fair value. Valuation of securities held by the Trust is discussed in Note
1(a) of the Trust's Notes to Financial Statements, which are included
elsewhere in this report.

(b) Investment income and expenses--The Fund records daily its proportionate
share of the Trust's income, expenses and realized and unrealized gains and
losses. In addition, the Fund accrues its own income and expenses.

(c) Income taxes--It is the Fund's policy to comply with the requirements of
the Internal Revenue Code applicable to regulated investment companies and to
distribute substantially all of its taxable income to its shareholders.
Therefore, no federal income tax provision is required.

(d) Prepaid registration fees--Prepaid registration fees are charged to
expense as the related shares are issued.

(e) Dividends and distributions to shareholders--The Fund declares dividends
daily and reinvests daily such dividends (net of non-resident alien tax and
backup withholding tax withheld) in additional fund shares at net asset value.
Dividends and distributions are declared from the total of net investment
income and net realized gain or loss on investments.

(f) Investment transactions--Investment transactions in the Trust are
accounted for on a trade date basis.


2. Transactions with Affiliates:
The Fund has entered into an Administration Agreement with Fund Asset
Management, L.P. ("FAM"). The general partner of FAM is Princeton Services,
Inc. ("PSI"), a wholly-owned subsidiary of Merrill Lynch & Co., Inc. ("ML &
Co."), which is the limited partner. The Fund pays a monthly fee at an annual
rate of .25% of the Fund's average daily net assets for the performance of
administrative services (other than investment advice and related portfolio
activities) necessary for the operation of the Fund.

Pursuant to the Distribution and Shareholder Servicing Plan in compliance with
Rule 12b-1 under the Investment Company Act of 1940, Merrill Lynch, Pierce,
Fenner & Smith Incorporated ("MLPF&S"), an affiliate of FAM, receives a
distribution fee from the Fund. The fee is accrued daily and paid monthly at
the annual rate of .125% of average daily net assets of the Fund for
shareholders whose Fund accounts are serviced by MLPF&S financial advisors,
whether maintained through MLPF&S or directly with the Fund's transfer agent.
The distribution fee is to compensate MLPF&S for providing, or arranging for
the provision of, account maintenance and sales and promotional activities and
services with respect to shares of the Fund. For the year ended March 31,
2006, MLPF&S earned $582,297 under the Shareholder Servicing Plan.

Financial Data Services, Inc. ("FDS"), a wholly-owned subsidiary of ML & Co.,
is the Fund's transfer agent. Interest is earned by the Fund from FDS based on
the difference, if any, between estimated and actual daily beneficial share
activity, which results in uninvested net proceeds from sales of Fund shares.

Certain officers and/or trustees of the Fund are officers and/or directors of
FAM, PSI, FDS, and/or ML & Co.

In February 2006, ML & Co. and BlackRock, Inc. entered into an agreement to
contribute ML & Co.'s investment management business, including FAM, to the
investment management business of BlackRock, Inc. The transaction is expected
to close in the third quarter of 2006.



CMA TREASURY FUND                                                MARCH 31, 2006



Notes to Financial Statements (concluded)                     CMA Treasury Fund


3. Beneficial Interest Transactions:
The number of shares sold, reinvested and redeemed during the periods
corresponds to the amounts included in the Statements of Changes in Net Assets
for net proceeds from sale of shares, value of shares reinvested and cost of
shares redeemed, respectively, since shares are recorded at $1.00 per share.


4. Distribution to Shareholders:
The tax character of distributions paid during the fiscal years ended March
31, 2006 and March 31, 2005 was as follows:


                                         3/31/2006        3/31/2005

Distributions paid from:
   Ordinary income                   $  13,513,981    $   5,837,177
   Net long-term capital gains                  --           13,835
                                     -------------    -------------
Total taxable distributions          $  13,513,981    $   5,851,012
                                     =============    =============


As of March 31, 2006, there were no significant differences between
the book and tax components of net assets.



Report of Independent Registered Public Accounting Firm       CMA Treasury Fund


To the Shareholders and Board of Trustees
of CMA Treasury Fund:

We have audited the accompanying statement of assets and liabilities of CMA
Treasury Fund as of March 31, 2006, and the related statement of operations
for the year then ended, the statements of changes in net assets for each of
the two years in the period then ended, and the financial highlights for each
of the five years in the period then ended. These financial statements and
financial highlights are the responsibility of the Fund's management. Our
responsibility is to express an opinion on these financial statements and
financial highlights based on our audits.

We conducted our audits in accordance with the standards of the Public Company
Accounting Oversight Board (United States). Those standards require that we
plan and perform the audit to obtain reasonable assurance about whether the
financial statements and financial highlights are free of material
misstatement. The Fund is not required to have, nor were we engaged to
perform, an audit of its internal control over financial reporting. Our audits
included consideration of internal control over financial reporting as a basis
for designing audit procedures that are appropriate in the circumstances, but
not for the purpose of expressing an opinion on the effectiveness of the
Fund's internal control over financial reporting. Accordingly, we express no
such opinion. An audit also includes examining, on a test basis, evidence
supporting the amounts and disclosures in the financial statements, assessing
the accounting principles used and significant estimates made by management,
as well as evaluating the overall financial statement presentation. We believe
that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements and financial highlights referred to
above present fairly, in all material respects, the financial position of CMA
Treasury Fund as of March 31, 2006, the results of its operations for the year
then ended, the changes in its net assets for each of the two years in the
period then ended, and its financial highlights for each of the five years in
the period then ended, in conformity with U.S. generally accepted accounting
principles.


Deloitte & Touche LLP
Princeton, New Jersey
May 22, 2006



CMA TREASURY FUND                                                MARCH 31, 2006



Schedule of Investments                                                            Master Treasury Trust           (In Thousands)

                                                             Face              Interest                Maturity
Issue                                                       Amount             Rate(s)                   Date            Value
                                                                                                          
U.S. Government Obligations*--99.0%

U.S. Treasury Bills                                        $140,160           3.861 - 4.485 %          4/06/2006      $   140,062
                                                            158,782           3.955 - 4.586            4/13/2006          158,532
                                                            172,889           4.005 - 4.58             4/20/2006          172,455
                                                             90,046            4.06 - 4.595            4/27/2006           89,750
                                                             18,648                   4.351            5/04/2006           18,575
                                                             30,000           4.362 - 4.39             5/11/2006           29,857
                                                              4,501                   4.442            5/18/2006            4,476
                                                             26,000                   4.467            5/25/2006           25,831
                                                             38,000           4.162 - 4.172            6/08/2006           37,689
                                                             35,000            4.19 - 4.217            6/22/2006           34,653
                                                             30,877            4.34 - 4.38             7/27/2006           30,433

U.S. Treasury Notes                                          10,000                   2.25             4/30/2006            9,981
                                                             57,000                   2.00             5/15/2006           56,816
                                                              5,000                   4.625            5/15/2006            5,000
                                                             30,000                   2.50             5/31/2006           29,896
                                                              5,000                   2.375            8/15/2006            4,956
                                                              4,700                   2.50            10/31/2006            4,637
                                                             11,402                   2.875           11/30/2006           11,255

Total Investments (Cost--$864,935**)--99.0%                                                                               864,854
Other Assets Less Liabilities--1.0%                                                                                         8,683
                                                                                                                      -----------
Net Assets--100.0%                                                                                                    $   873,537
                                                                                                                      ===========


  * U.S. Treasury Bills are traded on a discount basis; the interest rates shown are the range of
    discount rates paid at the time of purchase. U.S. Treasury Notes bear interest at the rates shown,
    payable at fixed dates until maturity.

 ** The cost and unrealized appreciation (depreciation) of investments as of March 31, 2006,
    as computed for federal income tax purposes, were as follows:


    Aggregate cost                                  $       864,935
                                                    ===============
    Gross unrealized appreciation                   $            23
    Gross unrealized depreciation                             (104)
                                                    ---------------
    Net unrealized depreciation                     $          (81)
                                                    ===============


    See Notes to Financial Statements.



CMA TREASURY FUND                                                MARCH 31, 2006



Statement of Assets and Liabilities                                                                         Master Treasury Trust


As of March 31, 2006
                                                                                                         
Assets

       Investments in unaffiliated securities, at value (identified cost--$864,935,150)                           $   864,853,868
       Cash                                                                                                                25,581
       Receivables:
           Contributions                                                                       $     7,871,204
           Interest                                                                                  1,030,172          8,901,376
                                                                                               ---------------
       Prepaid expenses                                                                                                     5,506
                                                                                                                  ---------------
       Total assets                                                                                                   873,786,331
                                                                                                                  ---------------

Liabilities

       Payables:
           Investment adviser                                                                          149,044
           Other affiliates                                                                              8,565            157,609
                                                                                               ---------------
       Accrued expenses                                                                                                    91,924
                                                                                                                  ---------------
       Total liabilities                                                                                                  249,533
                                                                                                                  ---------------

Net Assets

       Net assets                                                                                                 $   873,536,798
                                                                                                                  ===============

Net Assets Consist of

       Investors' capital                                                                                         $   873,618,080
       Unrealized depreciation--net                                                                                      (81,282)
                                                                                                                  ---------------
       Net Assets                                                                                                 $   873,536,798
                                                                                                                  ===============

       See Notes to Financial Statements.





Statement of Operations                                                                                     Master Treasury Trust


For the Year Ended March 31, 2006
                                                                                                         
Investment Income

       Interest and amortization of premium and discount earned                                                   $    29,915,030

Expenses

       Investment advisory fees                                                                $     1,913,838
       Accounting services                                                                             223,071
       Professional fees                                                                                47,605
       Trustees' fees and expenses                                                                      38,484
       Custodian fees                                                                                   31,548
       Pricing fees                                                                                      3,836
       Printing and shareholder reports                                                                    273
       Other                                                                                            20,903
                                                                                               ---------------
       Total expenses                                                                                                   2,279,558
                                                                                                                  ---------------
       Investment income--net                                                                                          27,635,472
                                                                                                                  ---------------

Realized & Unrealized Gain--Net

       Realized gain on investments--net                                                                                   49,565
       Change in unrealized depreciation on investments--net                                                               55,776
                                                                                                                  ---------------
       Total realized and unrealized gain--net                                                                            105,341
                                                                                                                  ---------------
       Net Increase in Net Assets Resulting from Operations                                                       $    27,740,813
                                                                                                                  ===============

       See Notes to Financial Statements.



CMA TREASURY FUND                                                MARCH 31, 2006



Statements of Changes in Net Assets                                                                         Master Treasury Trust

                                                                                                     For the Year Ended March 31,
Increase (Decrease) in Net Assets:                                                                   2006                2005
                                                                                                         
Operations

       Investment income--net                                                                  $    27,635,472    $    13,655,989
       Realized gain--net                                                                               49,565             23,252
       Change in unrealized depreciation--net                                                           55,776          (391,579)
                                                                                               ---------------    ---------------
       Net increase in net assets resulting from operations                                         27,740,813         13,287,662
                                                                                               ---------------    ---------------

Capital Transactions

       Proceeds from contributions                                                               4,793,985,856      5,338,064,437
       Fair value of withdrawals                                                               (4,917,573,291)    (5,497,700,237)
                                                                                               ---------------    ---------------
       Net decrease in net assets derived from capital transactions                              (123,587,435)      (159,635,800)
                                                                                               ---------------    ---------------

Net Assets

       Total decrease in net assets                                                               (95,846,622)      (146,348,138)
       Beginning of year                                                                           969,383,420      1,115,731,558
                                                                                               ---------------    ---------------
       End of year                                                                             $   873,536,798    $   969,383,420
                                                                                               ===============    ===============

       See Notes to Financial Statements.




Financial Highlights                                                                                        Master Treasury Trust


                                                                                                                 For the Period
                                                                                                              February 13, 2003++
The following per share data and ratios have been derived                   For the Year Ended March 31,          to March 31,
from information provided in the financial statements.                  2006            2005             2004         2003
                                                                                                      
Total Investment Return

       Total investment return                                           3.22%            1.35%             .81%            .60%*
                                                                  ============     ============     ============     ============


Ratios to Average Net Assets

       Expenses                                                           .26%             .25%             .23%            .25%*
                                                                  ============     ============     ============     ============
       Investment income and realized gain--net                          3.14%            1.34%             .82%            .98%*
                                                                  ============     ============     ============     ============

Supplemental Data

       Net assets, end of period (in thousands)                   $    873,537     $    969,383     $  1,115,732     $  1,298,116
                                                                  ============     ============     ============     ============

         * Annualized.

        ++ Commencement of operations.

           See Notes to Financial Statements.



CMA TREASURY FUND                                                MARCH 31, 2006



Notes to Financial Statements                             Master Treasury Trust


1. Significant Accounting Policies:
Master Treasury Trust (the "Trust") is registered under the Investment Company
Act of 1940, as amended, and is organized as a Delaware statutory trust. The
Declaration of Trust permits the Trustees to issue nontransferable interests
in the Trust, subject to certain limitations. The Trust's financial statements
are prepared in conformity with U.S. generally accepted accounting principles,
which may require the use of management accruals and estimates. Actual results
may differ from these estimates. The following is a summary of significant
accounting policies followed by the Trust.

(a) Valuation of investments--Portfolio securities with remaining maturities
of greater than sixty days, for which market quotations are readily available,
are valued at market value. As securities transition from sixty-one to sixty
days to maturity, the difference between the valuation existing on the sixty-
first day before maturity and maturity value is amortized on a straight-line
basis to maturity. Securities maturing sixty days or less from their date of
acquisition are valued at amortized cost, which approximates market value. For
purposes of valuation, the maturity of a variable rate security is deemed to
be the next coupon date on which the interest rate is to be adjusted. Other
investments and assets for which market quotations are not available are
valued at fair value as determined in good faith by or under the direction of
the Board of Trustees.

(b) Income taxes--The Trust is classified as a partnership for federal income
tax purposes. As such, each investor in the Trust is treated as owner of its
proportionate share of the net assets, income, expenses and realized and
unrealized gains and losses of the Trust. Therefore, no federal income tax
provision is required. It is intended that the Trust's assets will be managed
so an investor in the Trust can satisfy the requirements of Subchapter M of
the Internal Revenue Code.

(c) Security transactions and investment income--Security transactions are
recorded on the dates the transactions are entered into (the trade dates).
Realized gains and losses on security transactions are determined on the
identified cost basis. Interest income (including amortization of premium and
discount) is recognized on the accrual basis.


2. Investment Advisory Agreement and Transactions with Affiliates:
The Trust has entered into an Investment Advisory Agreement with Fund Asset
Management, L.P. ("FAM"). The general partner of FAM is Princeton Services,
Inc. ("PSI"), an indirect, wholly-owned subsidiary of Merrill Lynch & Co.,
Inc. ("ML & Co."), which is the limited partner.

FAM is responsible for the management of the Trust's portfolio and provides
the necessary personnel, facilities, equipment and certain other services
necessary to the operations of the Trust. For such services, the Trust pays a
monthly fee based upon the average daily value of the Trust's net assets at
the following annual rates: .25% of the Trust's average daily net assets not
exceeding $500 million; .175% of the average daily net assets in excess of
$500 million, but not exceeding $1 billion; and .125% of the average daily net
assets in excess of $1 billion.

For the year ended March 31, 2006, the Trust reimbursed FAM $19,874 for
certain accounting services.

Certain officers and/or trustees of the Trust are officers and/or directors of
FAM, PSI, and/or ML & Co.

In February 2006, ML & Co. and BlackRock, Inc. entered into an agreement to
contribute ML & Co.'s investment management business, including FAM, to the
investment management business of BlackRock, Inc. The transaction is expected
to close in the third quarter of 2006.



CMA TREASURY FUND                                                MARCH 31, 2006



Report of Independent Registered Public Accounting Firm   Master Treasury Trust


To the Investors and Board of
Trustees of Master Treasury Trust:

We have audited the accompanying statement of assets and liabilities,
including the schedule of investments, of Master Treasury Trust as of March
31, 2006, and the related statement of operations for the year then ended, the
statements of changes in net assets for each of the two years in the period
then ended, and the financial highlights for each of the respective periods
then ended. These financial statements and financial highlights are the
responsibility of the Trust's management. Our responsibility is to express an
opinion on these financial statements and financial highlights based on our
audits.

We conducted our audits in accordance with the standards of the Public Company
Accounting Oversight Board (United States). Those standards require that we
plan and perform the audit to obtain reasonable assurance about whether the
financial statements and financial highlights are free of material
misstatement. The Trust is not required to have, nor were we engaged to
perform, an audit of its internal control over financial reporting. Our audits
included consideration of internal control over financial reporting as a basis
for designing audit procedures that are appropriate in the circumstances, but
not for the purpose of expressing an opinion on the effectiveness of the
Trust's internal control over financial reporting. Accordingly, we express no
such opinion.

An audit also includes examining, on a test basis, evidence supporting the
amounts and disclosures in the financial statements, assessing the accounting
principles used and significant estimates made by management, as well as
evaluating the overall financial statement presentation. Our procedures
included confirmation of securities owned as of March 31, 2006, by
correspondence with the custodian. We believe that our audits provide a
reasonable basis for our opinion.

In our opinion, the financial statements and financial highlights referred to
above present fairly, in all material respects, the financial position of
Master Treasury Trust as of March 31, 2006, the results of its operations for
the year then ended, and the changes in its net assets for each of the two
years in the period then ended, and its financial highlights for each of the
respective periods then ended, in conformity with U.S. generally accepted
accounting principles.


Deloitte & Touche LLP
Princeton, New Jersey


May 22, 2006



CMA TREASURY FUND                                                MARCH 31, 2006



Officers and Trustees

                                                                                            Number of
                                                                                            Portfolios in  Other Public
                      Position(s)  Length of                                                Fund Complex   Directorships
                      Held with    Time                                                     Overseen by    Held by
Name, Address & Age   Fund/Trust   Served      Principal Occupation(s) During Past 5 Years  Trustee        Trustee
                                                                                            
Interested Trustee


Robert C. Doll, Jr.*  President    2005 to     President of MLIM/FAM-advised funds since    131 Funds      None
P.O. Box 9011         and          present     2005; President of MLIM and FAM since 2001;  177 Portfolios
Princeton,            Trustee                  Co-Head (Americas Region) thereof from 2000
NJ 08543-9011                                  to 2001 and Senior Vice President from 1999
Age: 51                                        to 2001; President and Director of Princeton
                                               Services, Inc. ("Princeton Services") since
                                               2001; President of Princeton Administrators,
                                               L.P. ("Princeton Administrators") since 2001;
                                               Chief Investment Officer of OppenheimerFunds,
                                               Inc. in 1999 and Executive Vice President
                                               thereof from 1991 to 1999.




 * Mr. Doll is a director, trustee or member of an advisory board of certain
   other investment companies for which MLIM or FAM acts as investment adviser.
   Mr. Doll is an "interested person," as defined in the Investment Company Act,
   of the Fund based on his positions with MLIM, FAM, Princeton Services and
   Princeton Administrators. Trustees serve until their resignation, removal or
   death, or until December 31 of the year in which they turn 72. As Fund/Trust
   President, Mr. Doll serves at the pleasure of the Board of Trustees.



Independent Trustees*

Ronald W. Forbes**    Trustee      1991/2002   Professor Emeritus of Finance, School of     49 Funds       None
P.O. Box 9095                      to present  Business, State University of New York at    50 Portfolios
Princeton,                                     Albany since 2000 and Professor thereof
NJ 08543-9095                                  from 1989 to 2000; International Consultant,
Age: 65                                        Urban Institute, Washington, D.C. from
                                               1995 to 1999.


Cynthia A. Montgomery Trustee      1994/2002   Professor, Harvard Business School since     49 Funds       Newell
P.O. Box 9095                      to present  1989; Associate Professor, J.L. Kellogg      50 Portfolios  Rubbermaid, Inc.
Princeton,                                     Graduate School of Management, Northwestern                 (manufacturing)
NJ 08543-9095                                  University from 1985 to 1989; Associate
Age: 53                                        Professor, Graduate School of Business
                                               Administration, University of Michigan
                                               from 1979 to 1985; Director, Harvard
                                               Business School Publishing since 2005;
                                               Director, McLean Hospital since 2005.


Jean Margo Reid       Trustee      2004 to     Self-employed consultant since 2001;         49 Funds       None
P.O. Box 9095                      present     Counsel of Alliance Capital Management       50 Portfolios
Princeton,                                     (investment adviser) in 2000; General
NJ 08543-9095                                  Counsel, Director and Secretary of
Age: 60                                        Sanford C. Bernstein & Co., Inc. (investment
                                               adviser/broker-dealer) from 1997 to 2000;
                                               Secretary, Sanford C. Bernstein Fund, Inc.
                                               from 1994 to 2000; Director and Secretary
                                               of SCB, Inc. since 1998; Director and
                                               Secretary of SCB Partners, Inc. since 2000; and
                                               Director of Covenant House from 2001 to 2004.


Roscoe S. Suddarth    Trustee      2000/2002   President, Middle East Institute from 1995   49 Funds       None
P.O. Box 9095                      to present  to 2001; Foreign Service Officer, United     50 Portfolios
Princeton,                                     States Foreign Service, from 1961 to 1995 and
NJ 08543-9095                                  Career Minister from 1989 to 1995; Deputy
Age: 70                                        Inspector General, U.S. Department of State,
                                               from 1991 to 1994; U.S. Ambassador to the
                                               Hashemite Kingdom of Jordan from 1987 to 1990.


Richard R. West       Trustee      1991/2002   Professor of Finance from 1984 to 1995,      49 Funds       Bowne & Co.,
P.O. Box 9095                      to present  Dean from 1984 to 1993 and since 1995        50 Portfolios  Inc. (financial
Princeton,                                     Dean Emeritus of New York University                        printers);
NJ 08543-9095                                  Leonard N. Stern School of Business                         Vornado Realty
Age: 68                                        Administration.                                             Trust (real estate
                                                                                                           company);
                                                                                                           Alexander's, Inc.
                                                                                                           (real estate
                                                                                                           company)




CMA TREASURY FUND                                                MARCH 31, 2006



Officers and Trustees (concluded)

                                                                                            Number of
                                                                                            Portfolios in  Other Public
                      Position(s)  Length of                                                Fund Complex   Directorships
                      Held with    Time                                                     Overseen by    Held by
Name, Address & Age   Fund/Trust   Served      Principal Occupation(s) During Past 5 Years  Trustee        Trustee
                                                                                            
Independent Trustees* (concluded)


Edward D. Zinbarg     Trustee      2000/2002   Self-employed financial consultant since     49 Funds       None
P.O. Box 9095                      to present  1994; Executive Vice President of the        50 Portfolios
Princeton,                                     Prudential Insurance Company of America
NJ 08543-9095                                  from 1988 to 1994; Former Director of
Age: 71                                        Prudential Reinsurance Company and former
                                               Trustee of the Prudential Foundation.


 * Trustees serve until their resignation, removal or death, or until December 31
   of the year in which they turn 72.

** Chairman of the Board of Trustees and the Audit Committee.



                      Position(s)  Length of
                      Held with    Time
Name, Address & Age   Fund/Trust   Served      Principal Occupation(s) During Past 5 Years
                                      
Fund Officers*


Donald C. Burke       Vice         1993/2002   First Vice President of MLIM and FAM since 1997 and Treasurer thereof since
P.O. Box 9011         President    to present  1999; Senior Vice President and Treasurer of Princeton Services since 1999
Princeton,            and          and         and Director since 2004; Vice President of FAM Distributors, Inc. ("FAMD")
NJ 08543-9011         Treasurer    1999 to     since 1999 and Director since 2004; Vice President of MLIM and FAM from 1990
Age: 45                            present     to 1997; Director of Taxation of MLIM from 1990 to 2001; Vice President,
                                               Treasurer and Secretary of the IQ Funds since 2004.


Cindy V. Macaulay     Vice         2002 to     Vice President of MLIM since 1996.
P.O. Box 9011         President    present
Princeton,
NJ 08543-9011
Age: 39


Jeffrey Hiller        Chief        2004 to     Chief Compliance Officer of the MLIM/FAM-advised funds and First Vice
P.O. Box 9011         Compliance   present     President and Chief Compliance Officer of MLIM (Americas Region) since
Princeton,            Officer                  2004; Chief Compliance Officer of the IQ Funds since 2004; Global Director
NJ 08543-9011                                  of Compliance at Morgan Stanley Investment Management from 2002 to 2004;
Age: 54                                        Managing Director and Global Director of Compliance at Citigroup Asset
                                               Management from 2000 to 2002; Chief Compliance Officer at Soros Fund
                                               Management in 2000; Chief Compliance Officer at Prudential Financial from
                                               1995 to 2000; Senior Counsel in the Commission's Securities and Exchange
                                               Division of Enforcement in Washington, D.C. from 1990 to 1995.


Alice A. Pellegrino   Secretary    2004 to     Director (Legal Advisory) of MLIM since 2002; Vice President of MLIM from
P.O. Box 9011                      present     1999 to 2002; Attorney associated with MLIM since 1997; Secretary of MLIM,
Princeton,                                     FAM, FAMD and Princeton Services since 2004.
NJ 08543-9011
Age: 46


 * Officers of the Fund/Trust serve at the pleasure of the Board of Trustees.



Further information about the Fund's Officers and Trustees is available in the
Fund's Statement of Additional Information, which can be obtained without
charge by calling 1-800-637-3863.


Custodian
State Street Bank and Trust Company
P.O. Box 351
Boston, MA 02101


Transfer Agent
Financial Data Services, Inc.
4800 Deer Lake Drive East
Jacksonville, FL 32246-6484
800-221-7210*

 * For inquiries regarding your CMA account,
   call 800-CMA-INFO (800-262-4636).


CMA TREASURY FUND                                                MARCH 31, 2006


Item 2 -   Code of Ethics - The registrant has adopted a code of ethics, as of
           the end of the period covered by this report, that applies to the
           registrant's principal executive officer, principal financial
           officer and principal accounting officer, or persons performing
           similar functions.  A copy of the code of ethics is available
           without charge upon request by calling toll-free 1-800-MER-FUND
           (1-800-637-3863).

Item 3 -   Audit Committee Financial Expert - The registrant's board of
           directors has determined that (i) the registrant has the following
           audit committee financial experts serving on its audit committee
           and (ii) each audit committee financial expert is independent: (1)
           Ronald W. Forbes, (2) Richard R. West, and (3) Edward D. Zinbarg.

Item 4 -   Principal Accountant Fees and Services

           CMA Treasury Fund
           (a) Audit Fees -         Fiscal Year Ending March 31, 2006 - $6,600
                                    Fiscal Year Ending March 31, 2005 - $6,500

           (b) Audit-Related Fees - Fiscal Year Ending March 31, 2006 - $0
                                    Fiscal Year Ending March 31, 2005 - $0

           (c) Tax Fees -           Fiscal Year Ending March 31, 2006 - $6,000
                                    Fiscal Year Ending March 31, 2005 - $6,300

           The nature of the services include tax compliance, tax advice and
           tax planning.

           (d) All Other Fees -     Fiscal Year Ending March 31, 2006 - $0
                                    Fiscal Year Ending March 31, 2005 - $0

           Master Treasury Trust
           (a) Audit Fees -         Fiscal Year Ending March 31, 2006 - $28,500
                                    Fiscal Year Ending March 31, 2005 - $28,000

           (b) Audit-Related Fees - Fiscal Year Ending March 31, 2006 - $0
                                    Fiscal Year Ending March 31, 2005 - $0

           (c) Tax Fees -           Fiscal Year Ending March 31, 2006 - $9,200
                                    Fiscal Year Ending March 31, 2005 - $8,700

           The nature of the services include tax compliance, tax advice and
           tax planning.

           (d) All Other Fees -     Fiscal Year Ending March 31, 2006 - $0
                                    Fiscal Year Ending March 31, 2005 - $0

           (e)(1) The registrant's audit committee (the "Committee") has
           adopted policies and procedures with regard to the pre-approval of
           services.  Audit, audit-related and tax compliance services
           provided to the registrant on an annual basis require specific pre-
           approval by the Committee.  The Committee also must approve other
           non-audit services provided to the registrant and those non-audit
           services provided to the registrant's affiliated service providers
           that relate directly to the operations and the financial reporting
           of the registrant.  Certain of these non-audit services that the
           Committee believes are a) consistent with the SEC's auditor
           independence rules and b) routine and recurring services that will
           not impair the independence of the independent accountants may be
           approved by the Committee without consideration on a specific case-
           by-case basis ("general pre-approval").  However, such services
           will only be deemed pre-approved provided that any individual
           project does not exceed $5,000 attributable to the registrant or
           $50,000 for all of the registrants the Committee oversees.  Any
           proposed services exceeding the pre-approved cost levels will
           require specific pre-approval by the Committee, as will any other
           services not subject to general pre-approval (e.g., unanticipated
           but permissible services).  The Committee is informed of each
           service approved subject to general pre-approval at the next
           regularly scheduled in-person board meeting.

           (e)(2)  0%

           (f) Not Applicable

           (g) Fiscal Year Ending March 31, 2006 - $3,754,550
               Fiscal Year Ending March 31, 2005 - $10,018,400

           (h) The registrant's audit committee has considered and determined
           that the provision of non-audit services that were rendered to the
           registrant's investment adviser and any entity controlling,
           controlled by, or under common control with the investment adviser
           that provides ongoing services to the registrant that were not pre-
           approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of
           Regulation S-X is compatible with maintaining the principal
           accountant's independence.

           Regulation S-X Rule 2-01(c)(7)(ii) - $1,227,000, 0%

Item 5 -   Audit Committee of Listed Registrants - Not Applicable

Item 6 -   Schedule of Investments - Not Applicable

Item 7 -   Disclosure of Proxy Voting Policies and Procedures for Closed-End
           Management Investment Companies - Not Applicable

Item 8 -   Portfolio Managers of Closed-End Management Investment Companies -
           Not Applicable

Item 9 -   Purchases of Equity Securities by Closed-End Management Investment
           Company and Affiliated Purchasers - Not Applicable

Item 10 -  Submission of Matters to a Vote of Security Holders - Not Applicable

Item 11 -  Controls and Procedures

11(a) -    The registrant's certifying officers have reasonably designed such
           disclosure controls and procedures to ensure material information
           relating to the registrant is made known to us by others
           particularly during the period in which this report is being
           prepared.  The registrant's certifying officers have determined
           that the registrant's disclosure controls and procedures are
           effective based on our evaluation of these controls and procedures
           as of a date within 90 days prior to the filing date of this
           report.

11(b) -    There were no changes in the registrant's internal control over
           financial reporting (as defined in Rule 30a-3(d) under the Act
           (17 CFR 270.30a-3(d)) that occurred during the second fiscal half-
           year of the period covered by this report that has materially
           affected, or is reasonably likely to materially affect, the
           registrant's internal control over financial reporting.

Item 12 -  Exhibits attached hereto

12(a)(1) - Code of Ethics - See Item 2

12(a)(2) - Certifications - Attached hereto

12(a)(3) - Not Applicable

12(b) -    Certifications - Attached hereto


Pursuant to the requirements of the Securities Exchange Act of 1934 and the
Investment Company Act of 1940, the registrant has duly caused this report
to be signed on its behalf by the undersigned, thereunto duly authorized.


CMA Treasury Fund and Master Treasury Trust


By:     /s/ Robert C. Doll, Jr.
       ---------------------------
       Robert C. Doll, Jr.,
       Chief Executive Officer of
       CMA Treasury Fund and Master Treasury Trust


Date: May 22, 2006


Pursuant to the requirements of the Securities Exchange Act of 1934 and the
Investment Company Act of 1940, this report has been signed below by the
following persons on behalf of the registrant and in the capacities and on
the dates indicated.


By:     /s/ Robert C. Doll, Jr.
       ---------------------------
       Robert C. Doll, Jr.,
       Chief Executive Officer of
       CMA Treasury Fund and Master Treasury Trust


Date: May 22, 2006


By:     /s/ Donald C. Burke
       ---------------------------
       Donald C. Burke,
       Chief Financial Officer of
       CMA Treasury Fund and Master Treasury Trust


Date: May 22, 2006