Surface irrigation system using siphon tubes. 2000. Photo by Dan Ogle, USDA Natural Resources Conservation Service.

http://photogallery.nrcs.usda.gov/Index.asp archive copy at the Wayback Machine

This image or file is a work of a United States Department of Agriculture employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image is in the public domain. English ∙ español ∙ 日本語 ∙ 한국어 ∙ македонски ∙ Nederlands ∙ русский ∙ slovenščina ∙ українська ∙ Tiếng Việt ∙ 中文（中国大陆） ∙ 中文（繁體） ∙ +/−