soil humus chemistry

例句：

1. 1. Soil humus plays acrucial role in maintaining soil health and fertility.
   土壤腐殖质在保持土壤健康和肥沃方面起着至关重要的作用。
2. 2. Thestudy of soil humus chemistry helpsus understand how different factors affect soil quality.
   土壤腐殖质化学的研究帮助我们了解不同因素如何影响土壤质量。
3. 3. In order toimprove soil fertility, farmers oftenincorporate organic matter into their soil humus.
   为了提高土壤肥力，农民经常将有机物质添加到土壤腐殖质中。