mulching cropping

例句：

1. 1.Tomatoes need mulching to protect them from the cold weather.
   番茄需要覆土来保护它们免受寒冷天气的影响。
2. 2.The farmer used mulch to improve soil quality and prevent weeds.
   农民使用覆土来改善土壤质量并防止杂草生长。
3. 3. Cover cropping is a practice of planting crops in the fields during the growing season to enrich the soil.
   轮作是一种在生长季节种植作物以丰富土壤的实践。