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Articles by M.A.R. Sarkar
Total Records ( 6 ) for M.A.R. Sarkar
  S.K. Paul , M.A.R. Sarkar and M. Ahmed
  Leaf production, leaf and culm dry matter yield of transplant aman rice as affected by row arrangement and tiller separation was investigated in this study. The highest number of leaves hill-1 (44.53, 70 DAT) was produced in single row, when tiller separation was done (41.00, 55 DAT) at 25 days after transplanting (DAT) and intact hills (48.74, 55 DAT). The lowest leaf production hill-1 was recorded in triple row (26.10, 100 DAT), when tiller separation was done at 35 DAT (26.99, 40 DAT) and 2 tillers kept hill-1 (19.88, 40 DAT). The maximum leaf dry matter yield (2.78 t ha-1, 70 DAT) was obtained in triple row which was statistically identical to double row (2.59 t ha-1), while tiller separation was done at 35 DAT (2.47 t ha-1, 85 DAT) and 4 tillers kept hill-1 (2.56 t ha-1, 85 DAT) which was statistically identical to intact hills (2.50 t ha-1, 85 DAT). But the lowest one was recorded in single row (0.47 t ha-1, 25 DAT), where tiller separation was done at 35 DAT (0.53 t ha-1, 25 DAT) and 2 tillers kept hill (0.56 t ha-1, 25 DAT). The maximum culm dry matter yield was recorded in triple row (4.14 t ha-1, 85 DAT), when tiller separation was done at 35 DAT (4.01 t ha-1, 85 DAT) and intact hills (4.10 t ha-1, 85 DAT) which was statistically identical to 4 tillers kept hil-1 (3.97 t ha-1, 85 DAT). But the lowest dry matter of culm was recorded in single row (0.42 t ha-1, 25 DAT); when tiller separation was done at 25 DAT (0.50 t ha-1, 25 DAT) and 2 tillers kept hill-1 (0.49 t ha-1, 25 DAT). Closer row spacing significantly reduced the leaf production ability hill-1 but increase leaf and culm production unit-1 area and hence, dry matter yield increased. To enhance leaf production hill-1, transplant aman rice cv. BR 23 (Dishari) can be grown in single row but to increase dry matter yield it can be grown in triple or double row arrangement. Tillers can be separated at 25 or 35 DAT keeping 4 tillers hill-1.
  M.Y.A. Pramanik , M.A.R. Sarkar , M.H. Kabir and G.M. Faruk
  An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during the period from May to November 1998 to investigate the effect of green manures and different levels of nitrogen on tillering behaviour, dry matter production and yield of transplant aman rice (cv. BRRI dhan32). The experiment was laid out in a randomized complete block design with three replications. The experiment comprised of 3 green manuring crops viz., Sesbania rostrata, Sesbania aculeata and Crotalaria juncea and 5 levels of N viz., 0, 20, 40, 60 and 80 kg ha-1. Dry matter production was increased with the age of the plant and also increasing trend was observed irrespective of green manuring crops in combination with higher levels of nitrogen, but number of tillers hill-1 increased up to 67 days after transplantation. The highest dry matter production and the highest number of tillers hill-1 were obtained with the incorporation of S. rostrata in combination with 80 kg N ha-1. S. aculeata also exhibited similar behaviour in these regards. The highest number of effective tillers hill-1 and the highest grain yield were obtained with Sesbania spp. in combination with 40 kg N ha-1 but C. juncea showed comparatively poor performance in respect of the aforesaid parameters due to less amount of biomass added during incorporation.
  S.N. Mozumder , M. Moniruzzaman , M.R. Islam , S.M. Faisal and M.A.R. Sarkar
  An experiment was conducted in a split plot design with 8 irrigation levels with or without mulch to determine optimum level of irrigation or mulch of Dwarf French bean (Bushbean) during two consecutive cropping seasons. Straw mulch significantly increased plant height, number of pods per plant, pod yield and profitability. Irrigation influenced most of the yield attributes except pod size and number of seeds per pod. The maximum number of pods and Benefit Cost Ratio (BCR) (5.03) was obtained from fortnightly flood irrigation (6 mm) with mulch while maximum pod yield (19.77 t ha-1) was obtained from half-weekly sprinkler irrigation (3 mm). The lowest yield (10.87 t ha-1) was obtained from control (no irrigation) without mulch. There was no significant effect of irrigation and mulch on pod size and number of seeds per pod.
  M.Y.A. Pramanik , M.A.R. Sarkar , M.A. Islam and M.A. Samad
  An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh, during the period from May to November 1998 to investigate the effect of green manures and different levels of nitrogen on the yield and yield components of transplant aman rice (cv. BRRI Dhan32). The experiment comprised of 3 green manuring crops viz., Sesbania rostrata, Sesbania aculeata and Crotalaria juncea and 5 levels of N viz., 0, 20, 40, 60 and 80 kg ha-1. Among the green manuring crops Sesbania rostrata produced the highest grain yield of transplant aman rice compared to other green manuring crops. The highest grain yield was obtained when the crop was fertilized with 40 kg N ha-1 in combination with Sesbania rostrata. Sesbania aculeata exhibited similar behaviour as that of Sesbania rostrata but Crotalaria juncea showed lower performance in respect of yield and yield components of transplant aman rice. Sesbania rostrata also showed the best performance in respect of plant height, total number of tillers hill-1, number of effective tillers hill-1, number of grains panicle-1, weight of 1000 grains and straw yield compared to other green manures.
  M.F. Hossain , M.A. Salam , M.R. Uddin , Z. Pervez and M.A.R. Sarkar
  An experiment was conducted to evaluate the performance of three modern rice varieties viz., BR1, BR14 and BR26 along with a local variety, namely, Hashikalmi grown under direct seeded and transplanted method. High yielding varieties produced significantly higher grain yield compared with local variety. A higher spikelet sterility was recorded for the local variety compared with modern varieties especially when grown under direct-seeded method. Methods of planting exerted a significant influence on the yield and yield attributes of aus rice. Transplanted rice gave higher yield than direct seeded rice for both local and high yielding varieties.
  D. Dutta , M.A.R. Sarkar , M.A. Samad and S.K. Paul
  The experiment was conducted to investigate the effect of row arrangement and nitrogen level on the yield and yield components of transplant aman rice (cv. BRRI dhan 32). The highest plant height at harvest, number of total tillers hill -1, number of effective tillers hill -1 number of non bearing tillers hill -1, grains panicle -1 and total spikelets panicle -1 were obtained in single row arrangement followed by double, triple and haphazard row system. The maximum grain and straw yield were obtained in double row arrangement. The highest number of effective tillers hill -1, grains panicle -1 and grain yield were found where the crop was fertilized with 120 kg N ha -1. These results were statistically identical when 60 and 90 kg N ha -1 were applied. So, cultivation of transplant aman rice (cv. BRRI Dhan 32) in double row arrangement appeared to be beneficial practice and fertilization with 60 kg N ha -1 was more economic in respect of grain yield.
 
 
 
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