吉县中垛乡南光村,全部耕地都处在黄土干旱垣上,粮食亩产一般仅70—100公斤。近年来,南光村摸索出了一种“集优种植耕作法”,粮食产量大幅度提高.1983年试种1.3亩,亩产744.5公斤。1985年全村种植365亩玉米,虽遭60天无雨大旱,最低亩产 Jixian Zhongduo Village Nanguang Cun, all the arable land is located in the loess dry wall, the grain per mu is generally only 70-100 kilograms. In recent years, Nanguang Village has worked out a method of “planting and planting under good farming practices,” with a substantial increase in grain output. In 1983, 1.3 mu of cultivated land was planted, yielding 744.5 kg of mu. In 1985 the village planted 365 acres of corn, although no rain and drought 60 days, the minimum per mu