In 1990, the effects of different irrigation treatments and pLanting densities on grain yield and vegetative and repoductive characteristics of white bean (phaseolus vulgaris L.), Line no. 11805 was studied. The experimental design was a plot iith three replications. The main plots were irrigation after 50±3, P70±3, 90±3, and 110±3 mm evaporation from class A Pan and9 ranged incomplete blocks. Three within—row spacing (10,20 and 30 Cm) were the sub-plots.
The highest and lowest grain yields (2297 and 965 Kg/ha) were obtained in plots irrigated after 70 and 110 mm evaporation. Grain yields in irrigation treatments after 50 and 70 mm evaporation were statistically identical. In addition to the grain yield, the studied characteristics were maximum in irrigation treatment after 70 mm evaporation and decreased with increasing moisture or moisture stress. By decreasing plant density, the grain yield of each plant increased, but the total yield decreased over a unit area . All vegetative and reproductive growth characteristics decreased by increasing plant density. The number of branches arid their yield components were of more important characteristics in defining the grain yield. Water use efficiency was maximum in irrigation treatment after 70mm evaporation,and 1.0Cm interplant spacing, and was minimumin irrigation treatment after 110 nm evaporation and 30 Cm interplant spacing.
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