滴灌在美国发展较快,从1976年到1979年农田滴灌面积约增加50％。1980年美国灌溉总面积达3.7亿亩,仅次于中国和印度,居世界第三位。而喷滴灌面积达1.2亿亩,居世界首位。在过去十年中,滴灌完全实现了自动化(包括土壤水分探测器,制动器及配水管顺序起闭装置)。并利用电子计算机及其辅助设备计算灌溉时间和蒸腾量,还用红外线 Drip irrigation developed rapidly in the United States, from 1976 to 1979 farmland drip irrigation area increased by about 50%. In 1980, the total irrigation area in the United States reached 370 million mu, second only to China and India, ranking third in the world. The drip irrigation area of ​​120 million mu, ranking first in the world. Drip irrigation has been fully automated over the past decade (including soil moisture detectors, brakes and water distribution systems). And use of computer and its auxiliary equipment to calculate the irrigation time and transpiration, but also with infrared