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早在1837年达尔文就开始研究土壤形成与蚯蚓的关系,认为蚯蚓是土壤改良者,它的活动能改善土壤结构和理化特性,有益于植物和农业生产。1881年他又著书论述了蚯蚓的活动与改良土壤的关
As early as 1837, Darwin began to study the relationship between soil formation and earthworms. Earthworms are regarded as soil remediators. Their activities can improve soil structure and physical and chemical properties, and benefit plants and agricultural production. In 1881 he wrote another book about earthworm activity and the improvement of the soil