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随着我国社会经济发展和人口的不断增长,对粮食需求问题日益突出。在耕地面积不可能有太多扩充的状况下,改良中低产土壤是增加粮食产量之重要途径,而中产土壤的改良要比低产土壤投入少、见效快。一般来说,中产土壤大多数没有特殊问题,分布在具有一定农业生
As China’s social and economic development and population continue to grow, the issue of food demand has become increasingly prominent. Under the condition that the area of arable land can not expand too much, the improvement of middle-low yield soil is an important way to increase grain yield. However, the improvement of middle soil is less than that of low yielding soil and quicker. In general, most of the middle-class soils do not have special problems and are distributed in some agricultural areas