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Articles by B.C. Roy
Total Records ( 3 ) for B.C. Roy
  M.A. Hossain , B.C. Roy , M.A. Rahman , A.I. Khan and A.W. Julfiquar
  On farm trials were established with two advanced hybrid rice lines, IR68877H and IR69690H during the boro season 2000-2001 in five locations-Fakirhat, Babuganj, Bhola sadar, Mothbaria and Nalchhiti upazilla under Bagerhat, Barisal, Bhola, Pirojpur and Jhalokathi districts, respectively. Near each hybrid rice field, BRRI dhan28 and BRRI dhan29 were also transplanted. The varieties BRRI dhan28 and BRRI dhan29 were used as check varieties for IR68877H and IR69690H, respectively. The performance of IR69690H was better than that of IR68877H. The grain yield of IR68877H varied between 6.5 and 9.30 t ha ha-1 with an average yield of 7.85 t ha ha-1 over the locations and that of IR69690H, it was 7.26 to 9.56 t ha ha-1 with an average of 8.25 t ha ha-1 . The average yield advantage of IR68877H over the check variety BRRI dhan28 was 1.41 t ha ha-1 and that of IR69690H over BRRI dhan29 was 1.51 t ha ha-1 . Great variations on grain yield were observed among the sites. The locations Babuganj and Bagerhat were the most productive, whereas the site Mothbaria was the least productive. Majority of the farmers preferred IR69690H, which was later released as hybrid rice variety named as BRRI hybrid dhan1 for Jessore and Barisal region. The farmers chose this line mainly due to its higher yield potential, larger panicle size, low shattering tendency of grain and good appearance.
  B.C. Roy , M.A. Hossain and M.A. Rahman
  Field experiment was conducted at the Bangladesh Rice Research Institute, Charbadna farm, Barisal, from boro 2001 to aman 2002. Seven photoperiod-sensitive rice varieties including three fine grain aromatic varieties were transplanted in December 15 and December 30, 2001. After harvest of boro crop the ratoons, came out from the remaining straw and base of the hills, were allowed to grow and in the succeeding aman a good harvest was obtained from those ratoons. In the boro season, the highest yield was obtained from BRRI dhan41 followed by BR23 (7.51 and 7.06 t ha-1, respectively). The yield of aromatic varieties was about 5 t ha-1. The ratoon-yields of both aromatic and non-aromatic varieties in the succeeding aman season were also encouraging and produced about 2 t ha-1, which was more than the average yield of local varieties normally cultivated in the transplanted aman season in that region. The highest yield was obtained from BR23 (2.87 t ha-1) followed by BRRI dhan37 (2.63 t ha-1). From this experiment, it was revealed that the photoperiod-sensitive rice varieties could be planted in the early boro season and the ratoons from this crop also produced a good harvest, might be a low-cost rice cultivation technique in those areas, where crop establishment in the transplanted aman season is somewhat difficult due to early intrusion of tidal water in the field at the end of boro season.
  M.M. Rashid , B.C. Roy , M. Asaduzzaman and M.M. Alam
  This study was conducted to know the management system, to determine cost and benefit, to identify constrains and to make recommendations for development of such small dairy farms in Jessore District. From this study, it was revealed that the milch cow per farm was 5.12 and average milk yield per day per cow was 5.78 liter. Cows were inseminated 76% by artificially and 24% by both natural and artificial means. About 68% roughage was used as dry and the rest used as green grass. Fifty four percent, 24% and 22% farms had semi pucca, kacha and pucca houses, respectively for their animals with 90% proper ventilation and 66% proper drainage system. Milking done by male 76%, female 20% and both 4%. Milk was sold to neighbors, vendors, restaurants and sweet makers. The average market price of milk per liter was Tk. 14.32. The average production cost per cow per year was Tk.. 17,790.83. Feed cost was Tk.. 14,024.54, which was 78.83% of production cost. On the basis of some problems reported by farm owners, some recommendations are made for sound dairy development in the study area.
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