Click on image to view larger version.
Fig. 5. Estimated grain yield for different cropping systems based on probabilities of estimated seasonal evapotranspiration (ET) and regression function of grain yield to estimated ET. Probabilities, expressed by the relative frequency, of ET values are calculated based on 24 yr of crop seasonal precipitation plus rainfall amount estimated by assuming fallow efficiency in fallow periods of the various cropping system. Regression functions in Table 3 were used to estimate grain yield related to probabilities of ET. Data points (
) are for minimum, 75% probability, 50% probability, 25% probability, and maximum ET values in 24 yr of records, respectively.
