土壤是农业生产最基本的生产资料,是劳动的对象。它与人类的关系非常密切。我们生活中所需的物资,绝大部分是从土壤中生长出来的,所以研究农业生产必须研究土壤。广大农民通过长期的生产实践,也深刻体会到:土是根,肥是劲,水是命,万物土中生,有土斯有粮。肥料是植物的粮食。它不仅 Soil is the most basic means of production of agricultural production, is the object of labor. It has a very close relationship with human beings. The vast majority of the supplies we need in our lives are grown from the soil, so we must study the soil to study agricultural production. Through long-term production practices, the vast majority of peasants have also deeply realized that soil is the root, where the fertilizer is strong, the water is the life, everything is born in the soil, and there is earth’s food. Fertilizer is the food of the plant. It is not only