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宣威是乌蒙山区一个旱粮主产县,全县耕地面积101.4万亩,其中旱地占86万亩。历年包谷种植面积45万亩左右,洋芋23万亩左右。一九七三年以前,洋芋、包谷大都净种,个别在洋芋地里满天星间套黄豆或包谷,通风透光不好,产量不高。在深入开展农业学大寨的群众运动中,一九七三年县委组织社队干部到昭通等地参观学习洋芋套大窝塘包谷的经验,结合宣威自己的特点,因地制宜进行旱地改制科学试验。县委领导同志亲自挂帅,大办样板,采取领导、群众、技术员相结合,试验、示范、推广相结合的办法,经过几年持续不断的努力,初步建立了双行洋芋套双行双株包谷
Xuanwei is a main grain-producing county in Wumeng Mountain, with an area of 1.041 million mu of cultivated land and 866 mu of dry land. Over the years Baigu planting area of 450,000 mu, about 230,000 acres of potato. Before 1973, potatoes, most of the net Valley package nettle, some in potato fields covered with star or soybean, poor ventilation and poor light, yield is not high. In deepening the masses’ movement in learning from Dazhai Agriculture, in 1973, the county party committee organized cadres from the communes and brigades to visit Zhaotong and other places to study and learn from the experiences of potato ponds and dipping ponds and valleys, combined with the characteristics of Xuanwei and scientific experiments of dryland reform according to local conditions . The leading comrades of the county party committee personally took the lead in organizing the model work and adopted a combination of leadership, mass and technicians to test, demonstrate and popularize the method. After several years of sustained efforts,