This article deals with the favorable influence of earthworm on soil structure formation. Investigation revealed that most of the smoothly egg-shaped, elliptic or round aggregates in sail were the products of the life activities of earthworm. Electron microscopic study showed that earthworm played an important part in the formation of organo-mineral complez in soil. Therefore, the aggregates formed by earthworms possessed a higher water-stability and the ability of nutrient supply and retentibn. It is assumed that there is possibility of using the earthworm activity as a means for the improvement of soil fertility.
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黄福珍.论蚯蚓对土壤结构形成及性态的影响[J].土壤学报,1979,16(3):211-217. Huang Fu-zhen. THE INFLUENCE OF EARTHWORM ON THE FORMATION OF SOIL STRUCTURE[J]. Acta Pedologica Sinica,1979,16(3):211-217.