山东、陕西、吉林、江苏等省正在开发、利用“肥水”(含氮量较高的地下水)灌溉农作物,获得显著的增产效果。这是一个值得重视的新事物。山东省莱阳县城厢公社南关大队贫下中农自1959年发现用井水浇的庄稼比用河水浇的长得好,此后连续多年不断扩大井灌面积,效果很好。近几年来,周围的生产大队也先后改河水灌溉为井水灌溉,均获得了显著的增产效果。1966年,南关大队进行了小麦浇水对比试验,结果浇井水的亩产676.5斤,比浇河水的360.1斤增产87.9%。为了探索井水灌溉增产的 Provinces such as Shandong, Shaanxi, Jilin and Jiangsu are developing and using “fertilizer water” (groundwater with high nitrogen content) to irrigate crops and achieve significant yield increase. This is a new thing worth highlighting. The poor middle peasants from the south gate brigade of Chengxiang commune, Laiyang county, Shandong province, have found that the well-irrigated crops grew better than those irrigated with river water in 1959 and have been expanding well-irrigation area for many years. In recent years, the surrounding production brigade has also changed river irrigation for well water irrigation, have achieved significant yield increase. In 1966, the South Gate Brigade carried out a contrast test of wheat watering. As a result, the yield per mu of well watering was 676.5 kg, an increase of 87.9% over the yield of 360.1 kg of caning water. In order to explore well water irrigation yield