Effects of Partial Rootzones Irrigation on Endogenous Hormones and Growthof Apple Branches and Leaves Effects of Partial Rootzones Irrigation on Endogenous Hormones and Growthof Apple Branches and Leaves Partial rootzone irrigation:its physiological consequencesand impact on water use efficiency Effects of Nitrogen Forms on Diurnal Variation of Photosynthesis of Tomato Seedlings under Alternate Partial Rootzone Irrigation