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B. SIVAKUMAR, M. SRINIVASA REDDY*, P. KAVITHA AND S. TIRUMALA REDDY
Department of Agronomy, Agricultural College, Mahanandi, ANGRAU, Kurnool (Dist) (A.P.), India.
A field experiment was conducted during kharif, 2014 to study the influence of different sowing dates and plant densities on productivity of soybean. It was comprised of nine treatments with three sowing dates (June 28, July 14 and July 29) and three row spacing’s (30 cm × 10 cm, 45 cm × 10 cm and 60 cm × 10 cm) and replicated thrice. Plant height, drymatter production, leaf area index (LAI), days to 50 per cent flowering, numbers of pods plant-1 (44.7), number of seeds per pod-1 (2.2), seed yield (1487 kg ha-1), haulm yield (2496 kg ha-1), harvest index (39.1%) and test weight (9.9 g) increased with early sowing on June 28 than later. Productivity of soybean was inconsistent with different row spacing’s. The highest plant height, drymatter production, leaf area index (LAI), seed yield (1396 kg ha-1), haulm yield (2386kg ha-1) and harvest index (39.2%), were recorded at a spacing of 30 cm × 10 cm. More number of days to 50 per cent flowering, highest number of pods plant-1 (48.1), number of seeds pod-1 (2.1) and test weight (9.9 g) were recorded at a spacing of 60 × 10 cm. The interaction between sowing dates and row spacing’s was significant with all the growth parameters and yield attributes except number of seeds pod-1 and test weight.
Growth, Plant densities, Sowing dates, Soybean, Yield attributes and Yield.