There is degradation after compression occurs and the tight. Difficult to get rid of diseases and insects. (39/2547 (2004), success) Make the roots penetrate far enough is not good. Affect the growth of the planted vegetables.
After the decomposition was used, and the tight compression. difficult to get rid of pests and diseases. (Itti harmonious, 2547) led roots infested poorly. As a result, the growth of the vegetables grown.