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苏联土壤学家威廉氏(1863—1939),总结了劳动人民的实践经验,提出了农、林、牧三位一体的农作制度。他用辩证唯物主义的观点观察自然,改造自然。认为土壤的本质特征是肥力,土壤的形成和土壤肥力的变化,是物质的地质大循环和生物小循环辩证统一发展的结果。所谓地质大循环指的是,岩石风化、地球表面各种化学元素的淋溶、迁移与沉积等过程;生物小循环指的是,动植物有机物质的形成和腐烂,再变成动植物可以吸收利用的营
The Soviet soil scientist William (1863-1939), summed up the working people’s practical experience, put forward the farming, forestry, animal husbandry, trinity system. He observed nature from the dialectical materialist point of view and transformed nature. It is considered that the essential characteristics of soil are fertility, the formation of soil and the change of soil fertility. It is the result of the dialectical unified development of the material geological cycle and biological cycle. The so-called geological cycle refers to the weathering of rocks, the leaching, migration and deposition of various chemical elements on the surface of the earth. The biological cycle refers to the formation and decay of organic matter of animals and plants, and then the animals and plants can absorb Camp used