Soil organic matter and nutrients(e. g. nitrogen, phosphorus and potassium) play important roles in soil fertility.
土壤有机质和养分（氮、磷和钾等）是土壤肥力重要的物质基础。
The results showed that straw application increased crop yield, soil organic carbon accumulation, soil total nitrogen and phosphorus content as well as phosphorus activation.
结果表明，秸秆还田提高了作物产量，增加了土壤有机碳积累和土壤氮磷含量，且能活化土壤磷素。
The paper introduces the research on comprehensive control technology of soil and water loss and nitrogen and phosphorus loss in stormed crack and excessive eroded soil in Dianchi lake basin.
介绍了滇池流域冲沟和强侵蚀区水土和氮磷流失控制研究的内容、方法及取得的效果等。
The biggest influence to soil organic carbon density was organic carbon content, the next was total nitrogen, and content of soil available phosphorus was also influenced soil organic carbon density.
对毛竹土壤有机碳密度影响最大的为有机碳含量，对土壤有机碳密度的影响次之的为土壤全氮量，土壤有效磷量对其影响程度也较大。
The biggest influence to soil organic carbon density was organic carbon content, the next was total nitrogen, and content of soil available phosphorus was also influenced soil organic carbon density.
对毛竹土壤有机碳密度影响最大的为有机碳含量，对土壤有机碳密度的影响次之的为土壤全氮量，土壤有效磷量对其影响程度也较大。
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