USDA-ARS
Irrigation and Drainage Research Directory http://www.ars.usda.gov/id/
Northwest Irrigation & Soils Research Laboratory http://kimberly.ars.usda.gov/
Salinity Laboratory http://www.ussl.ars.usda.gov/
Water Quality and Management http://www.nps.ars.usda.gov/programs/programs.htm?npnumber=201
USDA-NRCS
National Water and Climate Center http://www.wcc.nrcs.usda.gov/
Irrigation Page http://www.wcc.nrcs.usda.gov/nrcsirrig/
U.S. Bureau of Reclamation – Water Resources Research Laboratory http://www.usbr.gov/pmts/hydraulics_lab/
U.S. Department of the Interior – National Irrigation Water Quality Program http://www.usbr.gov/niwqp/
USGS - Water Resources of the United States http://water.usgs.gov/ [Top of Page]
Alberta Irrigation Projects Association http://www.aipa.org/
Irrigation Industry Association of British Columbia http://www.irrigationbc.com/
[Top of Page]
Utah State University – International Irrigation Center http://www.engineering.usu.edu/bie/
Washington State University – Prosser Irrigated Agriculture Research & Extension Center http://www.prosser.wsu.edu/
Washington State Irrigation Services – WSU Prosser
WSU Public Agricultural Weather System http://index.prosser.wsu.edu/
Washington Irrigation Scheduling Expert http://wise.prosser.wsu.edu/
Washington Scientific Irrigation Scheduling http://www.prosser.wsu.edu/