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AgriMet Crop Coefficients: Grass Hay (Mean)


Growth
Stage (%)
Crop
Coefficient
Growth Stage Indicators
0 0.60 Break Dormancy
10 0.69  
20 0.78  
30 0.85  
40 0.88  
50 0.92  
60 0.94 Full Canopy
70 0.95  
80 0.95  
90 0.95  
100 0.94 Heading
110 0.87  
120 0.80  
130 0.80  
140 0.80  
150 0.80  
160 0.80  
170 0.80  
180 0.76  
190 0.70  
200 0.65 Killing Frost

Curve developed by ARS research on lysimeter plots, Kimberly, Idaho 1990.
Note: Grass Hay-Mean represents an average daily water use that takes 3 seasonal cuttings into account.

See About Crop Coefficients for more information on AgriMet Crop Coefficients.