Green manure is an important kind of organic manures and plays an important role in rotation, improving quality of soil nutrients.

The data also indicated that it can be used in cultivating forest seedlings, growing vegetables and flowers to inhibit soil nematodes in the soil by row intercrop- ping, crop rotation and grafting.

Appropriate sowing date helped improve productivity with respect to key inputs, while appropriately delayed crop rotation was awarding to annual economic productivity of rice and wheat.