Abstract
A field experiment was conducted at Agro-meteorological Research Farm, Acharya Narendra Deva University of Agriculture and Technology, Kumarganj, Ayodhya, India during 2019-20. The experiment was conducted with Factorial Randomized Complete Block Design and replicated four times with nine treatment combinations consisting of three different sowing time D1 (31st October/23.5oC), D2 (10th November/23oC) and D3 (20th November/21oC) and three varieties V1 (Bio-902), V2 (NDR-8501) and V3 (Varuna). Results showed that higher growth and yield was observed when crop was sown on 31st October than other sowing times. Different thermal regimes were found to have a substantial impact on the yield attributes. Among the varieties Varuna gave highest growth and maximum yield as compared to other varieties due to fulfillment of congenial thermal Regime. Maximum utilization of heat from sowing to maturity was obtained when crop was sown on 31st October while minimum utilization of heat was obtained when the crop was sown on 20th November. Hence it can be concluded that the best sowing date of mustard is on 31st October in the early sowing. This study may help to select suitable sowing time under climatic condition of eastern Uttar Pradesh.
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