(一)、松土除杂草。油菜返青后要及时中耕松土,同时清除田间杂草、枯叶、病叶、老黄叶,以利通风透光,调整田间湿度,减少菌源,防病保花。(二)、清沟理墒。春季雨水偏多时,土壤含水量过高会影响根系生长发育,引起油菜落花和和感染病害。要及时疏通“三沟”,保证沟渠畅通,雨止田干。(三)、 (A), loosening weeds. Rape should be promptly cultivated in the soil after turning green, while clearing the field weeds, dead leaves, sick leaves, yellow leaves, to facilitate ventilation and humidity, adjust the field humidity, reduce bacteria, prevent disease and flower. (B), Qing ditch management soil moisture. When the spring rain is too much, the soil moisture content is too high will affect the growth and development of the root cause rape fall and infection diseases. To clear the “three ditch” in time to ensure that ditches flow, rain stop dry. (three),