The serious soil erosion,which leads to soil nutrients loss,is considered as one of the main forms of non-point source pollution. Soil and water conservation forests are established to conserve soil and water,and control the non-point source pollution.
土壤侵蚀引起土壤养分流失是非点源污染的主要形式,而水土保持林是治理水土流失及控制非点源污染的重要措施。
参考来源 - 重庆四面山水土保持林土壤—植物养分及生物多样性研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Soil nutrients loss is the main way of non point pollution from farmland.
土壤养分流失是农田非点源污染的主要形式。
Tillage practice had important effect on soil nutrients loss and soil degradation in the fragile karst ecosystem.
耕作对喀斯特脆弱生态系统土壤具有重要影响，是造成土壤养分流失、退化的主要原因。
This paper study on the effects of PAM on improving water stable aggregate and reducing nutrients loss from sandy soil, methods of Laboratory incubation and leaching were adopted.
采用在实验室培养和用淋洗管模拟田间淋洗的方法研究聚丙烯酰胺对沙土水稳性团粒结构改良作用，对氮、磷、钾养分保肥的作用以及其合理施用量。
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