Depending on environmental and site conditions as well as economic factors different irrigation methods are applied. The selection of the irrigation method depends on the crop to be irrigated, on the available water resources, the climate and the soil conditions, the topography, the water quality and on economic aspects.[1]
GIZ (1993): Irrigation and the environment. A review of environment issues. Part I & II: Environmental considerations in planning and operations.
http://www.fao.org/docrep/S8684E/s8684e08.htm#TopOfPage
http://www.fao.org/docrep/T0231E/T0231E00.htm
http://www.agricultureguide.org/guide-to-irrigation-method-a-featured-article/print/.
http://www.fao.org/docrep/R4082E/R4082E00.htm
http://www.fao.org/docrep/X0490E/X0490E00.htm
http://www.fao.org/docrep/S2022E/S2022E00.htm.
http://www.fao.org/DOCREP/003/T0234E/T0234E00.HTM
http://nibis.ni.schule.de/~trianet/soil/boden1.htm
http://nibis.ni.schule.de/~trianet/water/water.htm
http://www2.gtz.de/maintain/index.html.
http://www.ext.colostate.edu/pubs/crops/04708.html
http://www.fao.org/docrep/T7202E/T7202E00.htm
