EXHIBIT 11 DEKALB Genetics Corporation STATEMENT RE COMPUTATION OF PER SHARE EARNINGS years ended August 31, 1998, 1997 and 1996 (Dollars in thousands except per share amounts) 1998 1997 1996 BASIC EARNINGS PER SHARE: Average shares 34,577,265 34,250,522 32,515,743 outstanding* Net earnings for basic earnings per share computation $ 10,328 $ 28,781 $ 17,025 Basic earnings per share* $ 0.30 $ 0.84 $ 0.52 DILUTED EARNINGS PER SHARE: Average shares 34,577,265 34,250,522 32,515,743 outstanding* Net average additional shares outstanding assuming dilutive options exercised and proceeds used to purchase treasury stock at average market 1,787,502 1,493,528 1,037,906 price* Average number of common and common equivalent shares 36,364,767 35,744,050 33,553,649 outstanding Net earnings for diluted earnings per share computation $ 10,328 $ 28,781 $ 17,025 Diluted earnings per $ 0.28 $ 0.81 $ 0.51 share* *Earnings per share and all share amounts have been adjusted to reflect the two-for-one split of the Common Stock to holders of record July 25, 1997 and the three-for-one split of the Common Stock to holders of record May 10, 1996.