has been focused on breeding and variety selection and pest and disease management,but there has been less systematical research in optimum soil conditions and rational fertilization techniques.

Effect of combined fertilizers application techniques on the black soil fertility;

The key to fertilization technology lies in increasing investment of organic fertilizer,paying attention to microelement fertilizer\'s application and extending fertilizer formula after soil testing.

On the base of the soil investigation in 1981 and 1998,and soil fertility survey in 2007,the analysis of soil fertility and the evolution of fertilization technology were conducted on the Yunlianghu farm in Hubei Province from 1981 to 2007.

Research on fertilization techniques of high production of "Kexin No.4 potato";

Study on fertilization techniques for strong gluten wheat in lime concretion black soil;

)into cultivable land by the use of conventional fertilization techniques of drip irrigation.

Rational manuring plays a decisive role in improving asparagus s output and quality,so the paper analyzes the fertilizer practice at seedling stage and stocking stage.

On fertilization technique for rice in Shen Shi Nong Shu;

Studies on the Main Nutritional Characteristics and High Yielding Fertilization Technique of Brazilian Upland Rice IAPAR9;