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子长县位于延安地区北部,是个丘陵沟壑区,沟壑纵横,山川交错,海拔1000公尺左右。土壤为黄绵土,质地疏松,保水、保肥能力差。年平均温度9～10℃,无霜期150天左右,年降水量500毫米左右,60%集中在6～8月,春季十年九旱,夏、秋也多旱。农作物有糜、谷、玉米、高梁、大豆、洋芋。小麦等,轮作方式:山地以糜、谷为主,川地以玉米、高粱为主,全系一年一熟。小麦面积约占20%左右,全种植在山地阳坡,且多年连作。由于
Zichang County is located in northern Yan’an area, is a hilly and gully area, ravines aspect, mountain staggered, about 1,000 meters above sea level. Loess soil loess, loose texture, water, fertilizer and poor performance. The annual average temperature of 9 ~ 10 ℃, frost-free period of about 150 days, the annual rainfall of about 500 mm, 60% concentrated in June to August, nine spring drought ten years, summer and autumn are also more drought. Crops Mi, Valley, corn, sorghum, soybeans, potato. Wheat, etc., rotation mode: mountain to Mi, Valley-based, Sichuan to corn, sorghum-based, the whole year cooked. About 20% of wheat area, all planted in the mountain slope, and for many years continuous cropping. due to