The primary objectives of this project have been to evaluate site-specific management of nutrients in soybean production and to develop an understanding of site-specific soil and field properties and attributes that affect soybean yield. From 1998 through 2001, the focus was evaluating site-specific and whole field phosphorus (P) and potassium (K) management. The primary focus of the project in 2002 was calcium management in fields being used for soybean production. Gypsum was surface-applied to measure the impact of improved water infiltration and reduced surface crusting. However, owing to dry weather conditions, gypsum did not affect soybean yield in the year of application. Yields averaged near 42 bu/A. In this field, there was a fairly linear relationship between yield and cation exchange capacity (CEC) of the soil. Average yield increased from 38 bu/A up to 52 bu/A as the CEC increased from 5 to near 18 meq/100 g.