NEW MEXICO CLIMATE CENTER

New Mexico Crop Information

Creosote coefficient (k) to calculate evapotranspiration (ET) where Et=k*Eto

Eto = reference evapotranspiration or potential evapotranspiration referenced to grass.

Crop Coefficient uses growing degree days (GDD) accumulated from planting based on the averaging method of calculating GDD with  no maximum cutoff temperatures  and a base and lower cutoff  temperature is 0C.  The crop coefficient represents the water loss per projected area of the creosote canopy. The crop coefficient applies for day length greater than 11 hr. Set the crop coefficient to 0.25 for day lengths shorter than 11hr.