Analysis of crop nutrition limiting factors by TechnoGIN in Pujiang County of Zhejiang Province
对浙江省浦江县作物养分限制因子的TechnoGIN分析

This article describes how to use TechnoGIN to calculate crop nutrition limiting factors and to realize target yield in Pujiang county. At the present agricultural level of china, the same crop on different land units may suffer different degrees of nutrient excess and different farm crops on the same land unit may also experience different degrees of nourishment surplus. Such surplus is more severe in the cash crop than in food crops.with respect to the dry-land crops, most lands are deficient in nutrient. The degree of nitrogen leaching and vaporization by the crop in different types of land use can be calculated by using TechnoGIN. It is concluded that TechnoGIN is an efficient tool for calculating the nourishment gain and loss of crops. The result can be used to guide the agricultural production and protection of environment.