《农田水利与小水电》编辑部: 读1986年第2期,有参加国际会议情况报告,还有管道灌溉的文章。本期主题是管道灌溉,很有价值,也有意义,所以很感兴趣。我国北方水资源紧张,节约用水,十分重要。节水的主要措施是改进灌溉技术和方 Editorial Department of Cropland Water Resources and Small Hydropower: No. 2, 1986, reports on the participation in international conferences and articles on pipe irrigation. This issue of pipe irrigation is very valuable and meaningful, so it is very interesting. In northern China, water resources are tense and water conservation is very important. The main water-saving measures are to improve irrigation technology and methods