GbEng
堆肥腐烂有机体的混合物，如树叶或粪便，用来改善土壤结构并增加土壤养分 A mixture of decaying organic matter, as from leaves and manure, used to improve soil structure and provide nutrients.
土壤中的养分能促进植物生长. The nutrient in the soil acts as a stimulus to growth/to make the plants grow.
腐生菌；腐生物一种有机物，通常是细菌以死的动植物为食并把它们分解，藉此为生态系统提供有机养分 An organism, often a bacterium or fungus, that feeds on and breaks down dead plant or animal matter, thus making organic nutrients available to the ecosystem.
农业生物学；土壤生物学关于植物养分和与土壤条件相关的生长的研究，尤其是对判定如何增加农作物产量方法的研究 The study of plant nutrition and growth as related to soil condition, especially to determine ways to increase crop yield.