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1991年,山西大旱,岚县是全省最为干旱的县份之一。6月10日至9月14日,14次降水38.6mm,只为历年同期平均降水288.6mm的1/7,持续严重的夏秋连旱,使我县严重受灾减产,41万亩粮田其中18.7万亩绝收,2～3成收的达16.3万亩。然而出人意料的是:全县试验示范的4000亩机挖丰产沟作物却“齐刷刷,绿油油”。大旱之年夺得了平均亩产268.5公斤的好收成。特别是2005亩“全盖垅半盖沟”丰产沟田作物,亩均产高达440.56公斤。在特大干旱年,干旱瘠薄地产
In 1991, Shanxi drought, Lan County is one of the province’s most arid counties. From June 10 to September 14, the precipitation of 14 times was 38.6mm, only 1/7 of the average of 288.6mm of precipitation in the same period of last year. Continuous drought in summer and autumn continued to make serious losses and losses in our county, with a yield of 41 million mu of grain fields of which 18.7 Million acres of income, 2 to 3 into a total of 163,000 mu. However, it is surprising that: 4,000 mu of the pilot demonstration of the entire county dredged Feng Shizuigou crop but “uniform brush, green oil.” The dry year has won a good harvest of 268.5 kilograms per mu. In particular, 2005 mu “full cover 垅 semi-cover ditch” yield ditch crop, average yield per mu up to 440.56 kilograms. In the extremely dry year, arid barren real estate