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AgriMet Crop Coefficients: Grass Hay (Peak)


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 0.95 Full Canopy
70 0.96  
80 0.96  
90 0.96  
100 0.96 Heading
110 0.95  
120 0.93  
130 0.92  
140 0.90  
150 0.89  
160 0.87  
170 0.86  
180 0.84  
190 0.83  
200 0.81 Killing Frost

Curve developed by ARS research on lysimeter plots, Kimberly, Idaho 1990.
Note: Grass Hay-Peak is the ET for full cover fescue grass. It represents the peak daily consumptive use for grass regrown to full cover after any harvests.

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