ET Computation - Blaney-Criddle Method
Select a Period
Input Mean Monthly Temperature, k & p
°
C
k
p
ET
Jan
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Feb
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Mar
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Apr
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May
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Jun
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Jul
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Aug
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Sep
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Oct
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Nov
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Dec
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k =
Empirically Derived Seasonal Consumptive-use Coefficient Applicable to a Particular Crop
p =
Mean Monthly % of Annual Day Time Hour