NEW MEXICO CLIMATE CENTER

New Mexico Crop Information

Winter and Summer Mustard 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  a maximum cutoff temperatureof 68 F and a minimum and  base temperature is 50 F for winter mustard and calculating GDD with  a maximum cutoff temperatureof 86 F and a minimum and  base temperature is 50 F for summer mustard. Calculate GDD from beginning of the year for both winter and summer mustard.   ReferenceSharma, D. K. Kumar, A Criteria for scheduling the irrigation of mustard Tropical Agriculture 1993 70:1 16-21