奉化县农业局吴新月对本刊来稿,反映钾肥对油菜的增产作用。作者认为作为作物生长发育所需要的三大要素之一的钾,目前各地尚未引起足够的重视,但事实上,随着农业生产的发展,复种指数的提高,特别是对磷、钾需要量大的作物或品种的增加,土壤中磷、钾含量已极度缺乏。如奉化县江口 Fenghua County Bureau of Agriculture Wu Xin Yue draft of this publication, reflecting the potassium fertilizer on rapeseed production. The author believes that as one of the three major elements needed for crop growth and development, potassium has not been given sufficient attention in various places at present. In fact, with the development of agricultural production, the improvement of the multiple cropping index, especially for phosphorus and potassium Of the crop or variety increases, the soil phosphorus and potassium content has been extremely lacking. Fenghua County, such as Jiangkou