OSMOTIC ADJUSTMENT
The percentage osmotic adjustment at different phenological stages was calculated on the basis of difference, between estimated osmotic potential at Ψπ morning (7:00-7:30 am) and at Ψπ hour (11:00-11:30 am), Girma and Krieg, 1992) i.e. % Osmotic adjustment= [(Ψπ morning) – (Ψπ hour) x 100].
Five leaves per tree at different phonological stages were used for each determination and a mean of measurements was made on each sample.
STATISTICAL ANALYSIS
The data were analysed statistically in randomized block design and critical difference at 5% level was calculated.