关于农业的本质,苏联学者威廉斯在他的《土壤学》一书中,已经作了明确的阐述。他认为:“太阳光线能量的贮藏是农业生产的任务。”“太阳光线之有形的能（动能）,是农业生产借以制造其产物所用的原始材料,绿色植物把有形的能转变为它所创造的有机物质的化学亲合性之隐蔽的能（势能）。” With regard to the nature of agriculture, Soviet scholar Williams made a clear statement in his book Soil Science. He believes that “the storage of solar energy is the task of agricultural production.” “The visible energy (kinetic energy) of the sun’s rays is the raw material used by agricultural production to make its products, and the green plants transform the physical energy into what it creates The concealed energy (potential energy) of the chemical affinity of organic matter. ”