中文摘要：

以江苏省姜堰市沈高农场为例，分析了冬小麦生育期内土壤水分和养分产量的空间变异性，主成分-逐步回归的适当组合，能较为满意地降低土壤特性与产量关系分析中多重共线性的干扰，分析结果表明，土壤水分属弱变异性，养分属程度不同的中等变异性；所测土壤特性与产量关系的亲疏大致为：有机质和全氮量最密切，其次是速效氮，再次是速效钾，接下来是土壤水分和速效磷。

英文摘要：

Taking example for Shengao farm situated in Jiangyan of Jiangsu Province, spatial variability of soil water, nutrient contents and winter wheat yield were analyzed. The results indicated： （1）the method was effective on analyzing the relationship of yield and soil properties.（2）The variability coefficient of soil water content was in the weak intensity and the variability coefficients of soil nutrients were in the middle intensity. （3）Soil organic matter and total nitrogen were most closely related with crop yield, the effect of soil available N on yield was next below them. Soil moisture and available phosphorus were not most close- ly related with yield. Available K was next above Soil moisture and available phosphorus.