土壤农化区划研究是有关改善化肥分配和提高化肥肥效的许多工作中的最重要的组成部分。在这类研究中为农业地区所绘制的土壤农化图,能提高肥料需求预测和用肥计划的科学水平。土壤农化图与土壤图有以下两点不同:(1)只有农业地区才绘制土壤农化图;(2)在绘制土壤农化图时,不同发生土类、土属和土种的土壤并不绘成独立的图块,而是根据土壤对肥料的反应来分组绘制 Soil agro-zoning research is the most important component of many efforts to improve the distribution of fertilizers and to increase fertilizer efficiency. The map of soil chemistry developed for agricultural areas in this type of study can improve the scientific level of fertilizer demand forecasting and fertilizer use planning. There are two differences between a soil agronomy map and a soil map: (1) Soil agronomic maps are drawn only in agricultural areas; (2) Soil with different soil types, Instead of plotting separate plots, plots are drawn in groups based on how the soil responds to fertilizers