mild humus

例句：

1. 1.The soil in this area is rich in mild humus, which helps plants grow well.
   这个地区的土壤富含温和的腐殖质，这有助于植物生长。
2. 2. The mild humus in the soil helps to maintain moisture and nutrients for the plants.
   土壤中的温和腐殖质有助于保持水分和养分，为植物提供营养。
3. 3. The mild humus in the soil helps to prevent soil erosion and improve soil quality.
   土壤中的温和腐殖质有助于防止土壤侵蚀和提高土壤质量。