CROP COEFFICIENTS

Copyright – Regents of the University of California

Created January 25, 2001 - Last Update March 2, 2007

Authors 

R.L. Snyder, Biometeorology Specialist, Department of Land, Air and Water Resources, University of California, Davis, CA 95616, USA

M. Orang, Associate Land, and Water Use Analyst, California Department of Water Resources, Statewide Planning Branch, Land and Water Use Section, P.O. Box 942836, Sacramento, CA 94236-001

S. Matyac, Senior Land, and Water Use Analyst, California Department of Water Resources, Statewide Planning Branch, Land and Water Use Section, P.O. Box 942836, Sacramento, CA 94236-001

S. Eching, Associate Land and Water Use Analyst, California Department of Water Resources, Water Use Efficiency Office, P.O. Box 942836, Sacramento, CA 94236-0001

IMPORTANT NOTE: The theory behind crop coefficients is provided in this document. For a pdf copy of this document, click on Kc.pdf. The most recent K_c values available in California are provided in the Basic Irrigation Scheduling (BIS) program, which can be accessed by clicking on the following link.

Basic Irrigation Scheduling (BIS)

The Excel application program is available in English and metric units in English and in metric units in Spanish. The K_c values are given in the CropRef worksheet of the BIS program. They are updated whenever new information is available.