Real-Time ET
Using real-time ET information requires you to:
Access Reference ET information collected in California by the California Dept. of Water Resources' CIMIS program. Pasture grass is the reference crop in California.
Use a crop coefficient to convert Reference crop ET to Crop ET.
Crop ET =
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Reference ET x
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Crop Coefficient
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(ETc)
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(ETo)
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(kc)
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Crop coefficients are available from CIMIS and some are listed in this table.
For more information on using Real-time ET for irrigation scheduling, see the following:
"Scheduling Irrigations: When and How Much" - ANR Pub. 3396
Weekly Soil Moisture Loss Reports
CIMIS