ditch planting

例句：

1. 1. The farmers are using ditch planting to improve soil quality.
   农民们正在使用排水沟种植来改善土壤质量。
2. 2. Ditch planting is a sustainable method for growing crops in areas with poor soil.
   排水沟种植是一种在土壤贫瘠地区种植作物的可持续方法。
3. 3. In recent years, ditch planting has become increasingly popular among urban farmers.
   近年来，排水沟种植在城市农民中越来越受欢迎。