Estimating crop coefficients and actual evapotranspiration in citrus orchards with sporadic cover weeds based on ground and remote sensing data

HIGHLIGHTS

SUMMARY

Monitoring crop evapotranspiration ­(ETc) is crucial to evaluating actual crop water requirements. A widely accepted practical approach to estimating E ­ Tc is the FAO-56 (Allen et_al 1998), in which ­ETc is calculated as the product of crop reference evapotranspiration (ETo) and a single or dual crop coefficient ­(Kc or ­Kcb + ­Ke). ETo represents the evapotranspiration of a reference hypothetical crop (i.e., alfalfa), actively growing, adequately watered and characterized by defined values of height, surface resistance, and albedo, which is, therefore, associated with the meteorological evaporative demand. Under these conditions, the use of . . .

 



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