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Irrigation is the application of water to crops. The water may be diverted from a stream or pumped from a well. Irrigation is used during drought in humid areas, but is usual in arid climates. Irrigation is also used to suppress weeds in rice fields and to protect plants against frost. Agriculture that relies only on direct rainfall is referred to as rain-fed farming. Irrigation is often studied together with drainage, which is the natural or artificial removal of surface and sub-surface water.
- ↑ Williams, J. F.; S. R. Roberts, J. E. Hill, S. C. Scardaci, and G. Tibbits. Managing Water for Weed Control in Rice. UC Davis, Department of Plant Sciences. Retrieved on 2007-03-14.
- ↑ Snyder, R. L. & Melo-Abreu, J. P. (2005), Frost protection: fundamentals, practice, and economics – Volume 1, Food and Agriculture Organization of the United Nations, ISSN: 1684-8241., <ftp://ftp.fao.org/docrep/fao/008/y7223e/y7223e00.pdf>
Adapted from the Wikipedia article "Irrigation" http://en.wikipedia.org/w/index.php?title=Irrigation&oldid=211879664 released under the GFDL