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延安南部塬区包括洛河流域的洛川、富县,黄陵、宜君和黄龙等县部分地区,耕地170万亩,拔海1000～1200米,地势平坦,土层深厚,保水保肥性能较好,年平均气温9℃左右,一月平均气温-5℃左右,年极端最低平均气温约-20℃,降水量600毫米左右,雨量集中于7、8、9三月,占全年降水量的52—56%。常年种小麦80多万亩,占耕地55～80%,是延安地区小麦主产区。唯单产低而不稳,长期徘徊在百斤上下.近年,在“农业学大寨”运动的推动下,各地都涌现出一些高产典型,积累了许多宝贵经
The highland area in the southern part of Yanan consists of Luochuan, Fuxian, Huangling, Yijun and Huanglong counties in the Luohe River basin. The cultivated area is 1.7 million mu and 1000-1200 meters above sea level. The terrain is flat and has a deep soil layer. The annual average temperature is about 9 ℃, the average temperature in January is about -5 ℃, the annual minimum temperature is about -20 ℃, the precipitation is about 600 mm, and the rainfall is concentrated on July, August and August, accounting for precipitation in the whole year 52-56% of the amount. Perennial species of wheat more than 800000 acres, accounting for 55-80% of arable land, is the main producing areas of wheat in Yan’an. In recent years, with the promotion of the “Agriculture Studies in Dazhai” campaign, some high-yielding typicalities have emerged in various places and many precious and valuable materials have been accumulated