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榆林地区位于内陆偏北的风沙草原地带,海拔700-1800公尺,区内沙丘连绵,沟壑纵横,梁峁交错,有山、川、沟、滩和沙漠,地形复杂,北部是风沙区,南部是丘陵沟壑区。该区耕地面积1064万亩,其中山旱地面积达900多万亩,大陆性气候很显著,年雨量350～500毫米,多集中于七、八、九三个月,干旱、风沙、霜冻、洪涝、冰雹和病虫等灾害经常交错发生,特别是干旱、风沙和水土流失的危害,是影响本区作物均衡增产的主要原因。本区山旱地面积占耕地面积的9/10以上,迅速提高山旱地的作物产量,对保证全区作物的增产有着重要的意义。
Yulin area is located in the north-east of the windy steppe belt, elevation 700-1800 meters, the area stretches of sand dune, ravines aspect, beam staggered, mountain, river, ditch, beach and desert, the terrain is complex, the north is the sand area, The southern part is a hilly and gully area. The area of cultivated land in this area is 10,640,000 mu, of which the dry land covers an area of more than 9 million mu. The continental climate is remarkable with annual rainfall of 350-500 mm, mostly concentrated in seven, eight and nine months. Drought, sand, frost and floods Hail and pest and other disasters often staggered, especially the hazards of droughts, sandstorms and soil erosion, which are the main reasons for the balanced increase of crops in this area. The dry land area in this area accounts for more than 9/10 of the cultivated land area. Rapidly increasing the crop yield in mountain dry land is of great significance to ensuring the increase of crops in the entire area.