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陕西省定边县乱井子林场位于陕北榆林地区的西部,地处毛乌素沙漠的西南端。地广人稀。境内有盐碱滩地,流动沙地,半固定和固定沙地,地势比较平坦,潜水埋藏较浅。全场宜林地面积8万余亩,宜于机械作业的面积有4万余亩。为了加快绿化步伐,迅速改变陕北风沙区自然面貌,该场职工遵照毛主席“农业的根本出路在于机械化”的伟大教导,自1962年起坚持机械造林试验,取得了一定成效。1964年营造的200多亩小叶杨,1974年7月调查,每亩保存226株,平均树高4.1米,平均胸径5.5厘
Dingbian County, Shaanxi Province, Lupingzi Forest Farm is located in the western part of Yulin, northern Shaanxi Province, is located in the southwestern end of the Mu Us Desert. Sparsely populated. The territory of saline beach, mobile sand, semi-fixed and fixed sandy land, the terrain is relatively flat, buried shallow diving. The audience should forest land area of more than 80,000 acres, suitable for mechanical work area of more than 4 acres. In order to speed up the pace of afforestation and rapidly change the natural appearance of the windy and sandy areas in north Shaanxi, the staff and workers follow the great teachings of Chairman Mao that “the fundamental solution to agriculture lies in mechanization.” Since 1962, we insisted on afforestation experiments and achieved some success. In 1964 to create 200 acres of Populus, in July 1974 survey, 226 acres per acre preserved, the average height of 4.1 meters, the average diameter of 5.5 cm