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Articles by M.J.U. Chowdhury
Total Records ( 2 ) for M.J.U. Chowdhury
  K.P. Halder , S.M.A. Sattar , M.S. Islam and M.J.U. Chowdhury
  Due to late planting the panicle initiation, heading and maturity of all the cultivars were slowed with decreasing air temperature and solar radiation. Nizersail and BR11 did not complete flower beyond October 01 and September 01 planting, respectively while BR11 completed flowering in all the planting dates. An average temperature 23.92, 26.17 and 21.31°C for 10 days after start of heading was required for Nizersail, BR11 and BR22, respectively. Eighty three to 94% tillers of Nizersail produced fully exserted panicles upto October 01 planting while for BR11 it was 21-92% upto September 15 planting but in BR22 it was about 86-97% in all planting dates. Full panicle exsertion of Nizersail sharply increased with increasing temperature sum for 10 days from start of heading, later slightly decreased but it was sharply increased in BR11. The BR22 was less sensitive to temperature. The percent panicle exsertion was highly correlated with temperature sum for 1-10 days after start of heading for Nizersail (r = 0.87**) and BR22 (r = 0.96**). In BR11, it was highly correlated with temperature sum for 1-10, 11-20, 21-30 and 11-30, days from start of heading and the corresponding values were (r = 0.97**), (r = 0.95**), (r = 0.81*), (r = 0.90**), respectively.
  M.A. Wadud , G.M.M. Rahman , M.J.U. Chowdhury and M.G. Mahboob
  Performance of red amaranth (Amaranthus gangeticus) under four levels of light- 100, 75, 50, and 25% photosynthetically active radiation (PAR) was evaluated to judge its suitability for inclusion in agroforestry systems. Mosquito nets of different mesh size have been used to create desirable light levels. It was observed that in red amaranth, any reduction in PAR affected all morphological and yield parameters of red amaranth negatively. Plant height, number of leaves plant-1, leaf size, stem girth, fresh and dry yield were decreased significantly with decreasing light levels but the trend of response of different morphological parameters to different light levels were different. The mean fresh and dry yield (t ha-1) of red amaranth grown under 100, 75, 50 and 25 % PAR levels were 12.77, 9.54, 5.75, 3.19 and 1.27, 0.92, 0.55, 0.26, respectively. Therefore, red amaranth may not be included in tree-crop agroforestry system.
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