Z. Yan and C. Wei-xing, A Knowledge Model-and Growth Model-Based Decision Support System for Wheat Management, Sceintia Agricultura Sinica, issue.6, pp.37814-820, 2004.

. Xiong-fan-lun, . Qiao-ke-zhi, and . Hu-hai-ying, Agricultural Expert System and Development Tools.beijing:the publishing house of Qinghua University, 1999.

Y. Bing-ru, Knowledge Engineering and Knowledge Discovery.beijng:the publishing house of Metallurgy Industry, pp.423-450, 2000.

C. Yan and L. Xin, Information Management and Fertilizing Decision System Based on Soil Nutrient of SuperMap IS Cotton Field, XinJiang Agricultural Sciences, issue.6, pp.41427-430, 2004.

X. Kun-wu and . Cheng-ye-qing, The Design and Implementation of the Expert System Based on Database, Journal of Hubei Institute For Nationalities(Natural science, issue.2, pp.193-196, 2005.