Effects of soil nutrient precision management on yield of wheat and barely in Jiang-feng Farm, Songjiang District, Shanghai were studied by using GPS for site-specific management and ASI for fertilizer recommendation. The results indicated that soil available nutrients were affected by structural factors including parent rock, soil type and so on. The yield of barely was highly related to soil available nitrogen. When soil available NH₄--N and zinc were at their respective critical level, crop yield would be greatly affected and crop response to nitrogen and zinc application would be the most significant. Wheat increased by 42.0% and 26.5%, respectively, and barley by 37% in response to application of 10%~30% more 30% nitrogen and zinc fertilizer.