الفهرس 
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Abstract
The present was carried out in the experimental farm,faculty of agriculture,minia university during 1991 and 1992 seasons to study the effect of first irrigation date, GA3 conocentrations and plant distribution patterns on growth yield and is components in addition to seed chemical of soybean c.v. clark (Glycine max (L.)merr.)
In both seasons , the experimental desing was split-split plot with four replicates, the main plots were randomly assigned to three dates of first irrigation (7.14 and 21 days after sowing) the sub polts were devoted to GA., Concentrations i.e. Control , 100 ppm. And 200 ppm. And the sub-sub plots involved three patherns of plant distribution which were sowing on one side / ridge plus one plant/hill with 5- cm. between hills, one side / ridge plus 2 plants plant /hill and 10-cm between hills and twosides / ridge plus one plant /hill and 10-cmbetween hills.
The measurements of growth , yield and its components characteriesics were taken at ages of 50 and 75 days as well as at harvestin.