EXHIBIT 24 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that each person whose name appears below constitutes and appoints Robert B. Terry and Terry M. Campbell, and each of them, his true and lawful attorney-in-fact and agent with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign any and all amendments (including post-effective amendments) to this Registration Statement, as well as any related registration statement (or amendments thereto) filed pursuant to Rule 462(b) promulgated under the Securities Act of 1933, and to file the same, with all exhibits thereto and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. This Power of Attorney may be executed in multiple counterparts, each of which shall be deemed an original, but which taken together shall constitute one instrument. PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THIS REGISTRATION STATEMENT HAS BEEN SIGNED BY THE FOLLOWING PERSONS IN THE CAPACITIES AND ON THE DATES INDICTED. Signature Title Date s/s ALBERT J. SHIVLEY Chairman of Board October 21, 1998 Albert J. Shivley and Director s/s H.D. CLEBERG President, October 21, 1998 H. D. Cleberg Chief Executive Officer and Director (Principal Executive Officer) s/s JODY BEZNER Vice Chairman of Board October 21, 1998 Jody Bezner and Director s/s LYMAN L. ADAMS Director October 21, 1998 Lyman L. Adams, Jr. s/s RONALD J. AMUNDSON Director October 21, 1998 Ronald J. Amundson s/s RICHARD L. DETTEN Director October 21, 1998 Richard L. Detten s/s STEVEN ERDMAN Director October 21, 1998 Steven Erdman s/s HARRY FEHRENBACHER Director October 21, 1998 Harry Fehrenbacher s/s MARTIE FLOYD Director October 21, 1998 Martie Floyd s/s WARREN GERDES Director October 21, 1998 Warren Gerdes s/s BEN GRIFFITH Director October 21, 1998 Ben Griffith s/s GAIL D. HALL Director October 21, 1998 Gail D. Hall s/s BARRY JENSEN Director October 21, 1998 Barry Jensen s/s RON JURGENS Director October 21, 1998 Ron Jurgens s/s WILLIAM F. KUHLMAN Director October 21, 1998 William F. Kuhlman s/s GREG PHENNING Director October 21, 1998 Greg Pfenning s/s MONTE ROMOHR Director October 21, 1998 Monte Romohr s/s JOE ROYSTER Director October 21, 1998 Joe Royster s/s E. KENT STAMPER Director October 21, 1998 E. Kent Stamper s/s ELI F. VAUGHN Director October 21, 1998 Eli F. Vaughn s/s FRANK WILSON Director October 21, 1998 Frank Wilson