Abstract
The purposes of this study were examine the effect of spread and press wood chip from plant waste on weed control, investigation of the mechanism of weed control and suggestion of effective method for weed control. We made 16 experimental sites from combinations factors that removing surface soil conclude root of weed or not removing before spread wood chip, thickness of wood chip layer (4 levels), spraying sand to surface of wood chip layer or not and investigated growth of weed, soil environment, the characteristics of wood chip decomposition. It was thought that weed had been controlled by not only cut off light but also heat from fermentation of wood chip, decreasing oxygen. The most effective method for weed control was suggested that not removing surface soil, over 200mm of wood chip thickness and spraying sand to surface of wood chip layer.
