Bed planting improves soil fertility and structure and helps reduce erosion, water usage, herbicide use and facilitates mechanical and manual weeding.

垄播改善了土壤肥力和结构，对减少流失、水的利用和除草剂的施用也有帮助，也方便了机械和人工除草。

youdao

This improves the growth of roots and increases the movement of water through the soil.

VOA: special.2009.06.30

The mulch also improves the ability of the soil to hold moisture.

VOA: special.2009.06.30

Organic mulch protects but also improves the condition of the soil.

VOA: special.2009.06.30