山地砂石土是指石质山坡地上的土壤。我省这类耕地面积约750万亩,占全省耕地面积的10％左右。由于这类土壤位于坡地,并夹有大量砂砾或石块,保水保肥力差,土层较薄,产量较低,往往成为扯腿田。这几年,随着农业学大寨运动的深入发展,大搞农田基本建设,在山地砂石土上修了不少梯田,逐步改变了山地砂石土 Mountain gravel soil refers to the soil on the rocky slopes. About 750 million mu of cultivated land in our province is occupied, accounting for about 10% of the cultivated area of ​​the province. Because of this kind of soil is located on the slope, and sandwiched a lot of gravel or stones, poor water and fertilizer retention, thin soil, yield is low, often become pull leg field. In recent years, with the deepening development of the agricultural science education in Dazhai and the vigorous promotion of farmland infrastructures, many terraced fields have been cultivated on mountainous gravel soils, and mountainous gravelly soil