(一)特点本区包括卫宁灌区的中卫、中宁二县和青铜峡灌区的吴忠、灵武、青铜峡三县。小麦面积45万亩以上。地处灌区上游,地势较高,灌排方便,土壤熟化度较高,园田建设初具规模,地少劳多,耕作较细。除局部山区外,1981年春小麦平均亩产量超过700斤的有四个县,亩产600多斤的一个县(均按习惯亩计),属于高产地区。 (I) Characteristics This zone includes Zhongwei, Zhongning No. 2 counties and Wuzhong, Lingwu and Qingtongxia counties in the Weining Irrigation District. Wheat area of ​​450,000 mu or more. Is located in the upper reaches of the irrigation area, the higher terrain, irrigation and drainage convenience, soil maturation degree is high, the garden began to take shape, less landlords, thinner farming. Except for some mountainous areas, there are four counties with an average mu yield of more than 700 kg in spring 1981 and one county with a yield of more than 600 kilos (all according to the habit of mu), belonging to the high-yielding area.