Taking nitrogenous fertilizer,phosphate fertilizer and potash fertilizer as the experimental factors,the test uses "3414" fertilizing scheme to determine soil nutrient correction index and fertilizer utilization,and presents the prioritization fertilizing scheme of cotton land.

In this paper, a nonlinear programming model between yield and fertilizing amount of compact summer corn YeDan 13 was established,and how to decide an optimum fertilizing plan is studied.

In order to found one or two sets fertilization modes which is simple, matching, high-yielding and efficient, and provide theoretical.

Discussion on technique for formula fertilization and agrochemical service by fertilizer enterprises;

The 3414 test of rice formula fertilization with soil test in percogenic purple mud field has been studied in Dazhou City, the results indicated that, rice yield had a high positive correlation with fertilization amount, the correlation between nitrogen and yield was the best, phosphorus and potassium took second place.

The soil obstacle factor, the critical values of some nutrients and the supply intensity, as well as fertilizer efficiency should be paid more attention in formula fertilization by soil testing.

Effects of different fertilization methods on chlorophyll fluorescence parameters and yield of summer maize;