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渭北黄土高原北起延河,南到关中平原北缘,东自黄河,西至陇县。地理位置为北纬34度30分至36度30分,东经106度30分至110度30分。总面积6750万亩,约有宜林荒山荒地800余万亩。地势西北高而东南低,海拔800～1500米。为褐色土区,黄土母质,土层一般厚50米左右,质地多为轻壤或中壤,属强石灰反应,一般为微碱性或碱性,森林
Weibei Loess Plateau North Yanhe, South of the Guanzhong Plain north edge of the Yellow River from east to west Longxian. The geographical location is latitude 34 degrees 30 minutes to 36 degrees 30 minutes, longitude 106 degrees 30 minutes to 110 degrees 30 minutes. The total area of 6750 mu, about 1000 acres of barren mountain wasteland. High terrain northwest and southeast low, 800 to 1500 meters above sea level. For the brown soil, loess parent material, the soil is generally about 50 meters thick, mostly light soil or soil texture, is a strong lime reaction, generally slightly alkaline or alkaline, forest