Effects of sowing date on the yield and yield components of mustard and rapes
2002
Islam, N. | Choudhury, M. (Bangladesh Agricultural Univ., Mymensingh (Bangladesh). Dept. of Agronomy)
Five varieties of mustard and rapes viz. Tori-7, TS-72, Daulat, Rai-5 and Sonali Sarisha were compared for yield and yield components with respect to sowing on October 20, November 04, November 18, and December 02, 1991. Results showed that yields were greater when seeds were sown on November 04, compared to both the early and late sowings. Yield reductions were much higher from sowing seeds beyond November 18. Varieties differed significantly with the order of seed yields: Sonali Sorisha greater than Daulat greater than Rai-5 greater than TS-72 greater than Tori-7. The yield reductions due to delayed sowing up to November 18, were much lower in Tori-7 and TS-72 compared to other varieties. Sowing on October 20, appeared to be early for Daulat, Rai-5 and Sonali Sarisha since these varieties gave higher yields when sown on November 04. Correlation studies between plant size at different developmental stages and seed yield/ plant evidenced that sowing on November 04, produced suitable sized plants, which efficiently yielded more, and each of early and late sowings produced either oversized or undersized plants for producing lower seed yields.
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