在黄土高原南部的陕西关中和晋南台塬区,广泛地流传一句农谚:“麦收隔年墒”。意思是说,冬小麦产量的高低取决于前一年雨季降水对土壤墒情补充和恢复的程度。这句简单的话是群众干百年来从事农业生产实践而总结出来的一条小麦生产的重要规律。远在五十年代,我们也发现,在春季干旱严重的年份,冬麦单产依然可以达到四、五百斤以 In the southern part of the Loess Plateau in Shaanxi Guanzhong and Jinnan Taiwan Plateau, a widely circulated agricultural proverb: “wheat harvest soil moisture from next year.” The implication is that the level of winter wheat production depends on the level of replenishment and restoration of soil moisture in the previous year during the rainy season. This simple sentence is an important law of wheat production that has been summed up by the masses for hundreds of years in agriculture. As far back as the 1950s, we also found that winter wheat yield can still reach four or five hundred catties per year in the severe spring drought season