Abstract
Field experiment was conducted during rabi (winter) season of the year 2016–17 with grass pea (Variety: ‘Prateek’) sown on nine dates from 26th October to 21st December at weekly interval at Instructional Farm, Bidhan Chandra Krishi Viswavidyalaya, West Bengal to study the effect of agro-climatic factors on the yield components viz., number of pods per plant (PP), number of grains per pod (GP) and test weight of grains (TW). PP showed positive association with air temperatures during vegetative phase (Tmax: 0.70*; Tmin: 0.70* and Tmean: 0.70*). Significant positive correlations were observed between TW and average daily maximum temperature and diurnal temperature range during the postflowering phase (Tmax: 0.71* and Trange: 0.75*). Number of pods per plant could be predicted at the end of vegetative and reproductive stages with 69.9 and 70.1% predictability, respectively. On the other hand, test weight of grains could be predicted at the end of reproductive phase with 94.8% predictability.
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