Vol. 12, Issue 1 (2023)

Author(s):
AR Tupe, DW Thawal, SB Kharbade, MM Ganvir, ST Morey, SV Lunge and RS Mali

Abstract:
To study agrometeorological indices for soybean crop under different sowing dates, the experiment was conducted at the experiment field of Department of Agricultural Meteorology. College of Agriculture Pune-5 during kharif seasons of 2012-13 and 2013-14. The experiment was laid out in a Split Plot Design with four replications. The main plot was constituted of four sowing dates in the month of June and July (fortnight interval) and in sub plot factor comprised of three soybean genotypes [(JS-335, MACS-450 and DS-228 (Phule Kalyani)]. The soybean crop was sown in I FN of June (S₁) accumulated higher Growing Degree Days (GDD) and significantly higher biomass and seed yield with maximum heat use efficiency. Subsequent, sowings beyond II FN of June (S₂), I FN of July (S₃) and II FN of July (S₄) during 2012 and 2013 encountered higher amount of heat use efficiency and rainfall during vegetative and flowering stage and decreasing trend of heat use efficiency and rainfall across the critical reproductive stage of seed formation to development which consequently resulted in lower seed yield.