In response to manuring, NMC gradually increased in succeeding ratoons. The court might also regulate the rotation of crops and the manuring of the ground. Systematic ploughing, manuring, weeding, irrigation and crop protection was practiced for sustained agriculture. The branches are trampled into the puddle soil in rice field for green manuring. The locals practiced an "itinerant form of agriculture", instead of manuring the soil. Manuring also increased ACW by 62-75%.