Yield of modern irrigated rice varieties under different population dynamics [in Bangladesh]
1991
Mannan, M.A. | Rahman, M.B. | Chowdhury, A.A. | Siddique, S.B.
Experiments were conducted at the Bangladesh Rice Research Institute (BRRI) farm, Gazipur, during 1986 and 1988 Boro seasons. Modern rice varieties, BR1, BR3, BR12, BR14, and BR20, were planted at 25 cm x 30 cm, 25 cm x 20 cm, 25 cm x 15 cm, 25 cm x 10 cm and 15 cm x 10 cm spacings. The objective was to determine the optimum population density for a higher yield. The number of tillers, panicles and grain yield per unit area increased with the increase in plant densities. Planting at 25 cm x 10 cm and 15 cm x 10 cm spacings gave identical and significantly higher grain yield. Among the tested varieties, BR14 yielded the highest grain with 150-155 days growth duration
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