In the paddy rice paddy field, we are stuffing rice husk and rice straw. Also, during the heavy rain of the rainy season, the water from the agricultural canal flowed backward, many pests were many, and it was a troublesome seed. The farmer heard that it is compliant with lime nitrogen, 20 kg entrance, so I bought 1 kg which can be used up as much as possible. I sprayed it for a week. Although it is clay-based soil, grass, rice husk, decomposition proceeds moderately and I am looking forward to the growth of the next crop.