NEW MEXICO CLIMATE CENTER

New Mexico Crop Information

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

Eto = reference evapotranspiration or potential evapotranspiration referenced to grass.

Crop Coefficient for mature pine trees with a closed canopy. Growing degree days were calculated using  a base of 41 F and a maximum cutoff of 86 F and minimum cutoff of 41 F. .

Metric units- Crop Coefficient for mature pine trees with a closed canopy. Growing degree days were calculated using  with a base of 5C and a maximum cutoff of 30 C and minimum cutoff of 5 C. .

The reference for this work  James T. Fisher and Richard W White 1985, Seasonal evapotranspiration, growth and water use efficiency by plantation grown Pinus Eldarica Medw. Derived from field and weighting lysimeter studies Technical completion report WRRI  No. 193 New Mexico Water Resources Research Institute p1-51