Abstract
Field studies were conducted during 1990-92 at Agronomic experimental area, Agriculture Institute, Tandojam to determine the effect of planting patterns and irrigation regimes on growth and seed yield of soybean . Four interrow and intrarow spacings (45 x 5,45 x 10,60 x 5, and 60 x 10 cm) and four irrigation levels (3,4,5 and 6) were tested against soybean during each year. Spacings had significant influence on days to flowering, days to maturity, plant height, branches/plant, pods/plant, single plant weight and seed yieldlha. Closer interrow and wider intrarow spacing (45 x 10 cm) yielded significantly the maximum, while growth and yield components were superior at wider row and plant spacing (60 x 10 cm). Similarly, irrigation levels had significant effect on all the characters studied. Six irrigations applied at different growth stages (25 days after sowing, bud formation, flowering, pod initiation, seed formation, and complete pod filling stage) gave the maximum seed yield, which was associated with better growth and yield components. Key words: irrigation levels, planting patterns, soybean, yield components
