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渭南地区位于陕西省关中东部,全地区每年种植棉花二百万亩,其中旱地棉花占牛数以上,百分之八十集中在渭北旱原。旱原的自然条件对棉花的生长发育是不完全适应的。根据蒲城县气象资料分析,渭北旱原年平均降雨量为五百毫米左右,而在六、七、八三个月的降雨量不到二百毫米。这一阶段气温增高,蒸发量
Weinan region is located in the eastern part of Guanzhong, Shaanxi Province. The whole region annually grows 2 million mu of cotton, of which, dry land cotton accounts for more than 80% of the total number of cattle, while 80% of them are concentrated in the Weibei drylands. The natural conditions of drylands are not completely adapted to the growth and development of cotton. According to the analysis of meteorological data in Pucheng County, the average annual rainfall in Weibei uplands is about 500 millimeters while the rainfall in the six, seven and eight months is less than 200 millimeters. During this period the temperature increased, evaporation