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一榆林地区位于西北黄土高原北部,毛乌素沙漠南缘。大体以长城为界,南部是丘陵沟壑区,北部是风沙区。沙漠分布在7个县,面积1.6万平方公里,占全区总面积的37%;耕地200多万亩,农业人口47万,都占全区的20%左右。这里风大沙多,干旱少雨,常年降雨量300—450毫米,多集中在7—9三个月;无霜期短,一般只有120—150天。风沙、旱、涝、霜冻、冰雹等自然灾害频繁;特别是风沙侵害,曾经给农业生产和
Yulin area is located in northwestern Loess Plateau, the southern margin of the Mu Us desert. In general, the Great Wall is bounded by the hilly and gully regions in the south and the wind and sand regions in the north. The deserts are distributed in 7 counties with an area of 16,000 km 2, accounting for 37% of the total area of the region. Over 2 million mu of arable land and 470,000 agricultural population all make up about 20% of the total area. Windy sand here, dry, rainy year-round rainfall of 300-450 mm, mostly concentrated in the 7-9 three months; frost-free period is short, usually only 120-150 days. Wind and sand, drought, waterlogging, frost, hail and other natural disasters; especially the wind and sand damage, once to agricultural production and