1. http://ga.water.usgs.gov/edu/pictureshtml/irsprayhigh.html
2. http://ga.water.usgs.gov/edu/pictureshtml/irfurrow.html
3.http://www.photovault.com/Link/Food/FarmingAsia/FMAVolume01.html
4. http://www.benmeadows.com/scstore/t-BAGA.html
5. http://www.planetarydialogues.com/who/cairo/eairriga.htm
6. http://www.agri.state.id.us/Dairy/Land.html
7. http://www.erskine.edu/news/irrigation.11.16.00.html
8. http://www.dripirrigation.com/dripstor/contact.htm
9- http://www.usda.gov/oc/photo/opc-farm.htm
10- http://www.clw.csiro.au/ImageGallery/image-search.html