Irrigation in the Pacific Northwest

Historic Average Water Needs Estimate
For All Crops for One Station

Calculates and displays the ETc at one station for all crops. This uses the 21 point crop coefficients that are based on Day of Year. Because of this, these numbers are most applicable to the Columbia Basin. Go here for more information.

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WSU Prosser - IAREC, 24106 N Bunn Rd, Prosser WA 99350-8694, 509-786-2226. Contact Us