甘肃省东部庆阳地区是全国黄土高原的一部分,土层深厚,地势平坦,气候温和,雨量比较充沛,农业生产的条件比较优越,号称甘肃省的粮仓.但农作物的产量水平不高,其原因虽多,但主要是肥料的严重缺乏.为了研究化肥在这一地区应用的问题,庆阳专区农科所(以下简称本所)及甘肃省农业科学院土肥所工作组先后做过10个氮、磷、钾三要素试验,其中5个作物是冬小麦,2个作物是玉米,1个作物是糜子,2个作物是高粱. The Qingyang area in the eastern part of Gansu Province is a part of the country’s Loess Plateau, with deep soil layers, flat terrain, mild climate, abundant rainfall and favorable conditions for agricultural production, which is known as the granary in Gansu Province. However, the yield of crops is not high Although many, but mainly a serious lack of fertilizer.In order to study the application of fertilizers in this area, Qingyang Prefecture Agricultural Institute (hereinafter referred to as the Institute) and Gansu Academy of Agricultural Sciences Soil and Fertilizer Task Force has done 10 nitrogen, Phosphorus and potassium three elements test, of which five crops are winter wheat, two crops are corn, one is millet millet, two crops are sorghum.