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Articles by B. Ahmed
Total Records ( 4 ) for B. Ahmed
  M.F. Hasan , B. Ahmed , M.A. Rahman , M.M. Alam and M.M.H. Khan
  The study was conducted to analyze the responses of two tomato varieties, BARI tomato-4 and BARI tomato-6 to different environments. The environment used in the experiment were no mulch or control (E0), straw mulch (E1), black polythene mulch (E2), water hyacinth mulch (E3) and am-ada leaf mulch (E4). There were significant influences of different mulches on the growth and yield of tomato. The height of plant, number of leaves, number of main roots, length of roots, fresh and dry weight of roots, number of flower and fruit clusters, number of fruits per plant, weight of fruits and fruit yield per hectare were significantly higher under the environment provided by black polythene mulch. There were also variations in yield contributing characters between the varieties. BARI tomato-6 produced higher yield (55.16 t ha 1) than BARI tomato-4 (51.8 t ha 1). Among the variety-environment combinations the highest yield (61.18 t ha 1) was produced by BARI tomato-6 under the environment of black polythene mulch. This combination also gave the best economic return (BCR = 4.52).
  M. Rashid , R. Nawaz and B. Ahmed
  The results revealed that 42 and 40 percent feed samples contained labelled amount of vitamin A and D respectively, while 34 and 26 percent samples contained lesser amount and 26 and 32 percent samples contained excess amount of vitamin A and D in the poultry feeds.
  M.Y. Ali , D. Kamal , S.M.M. Hossain , M.A. Azam , W. Sabbir , A. Murshida , B. Ahmed and K. Azam
  Biological studies of the mud crab, Scylla serrata (Forskal) collected from the Sundarbans mangrove ecosystem of Bangladesh were conducted during May, 2001 to February, 2002. The overall sex ratio of male to female was found to be 1:0.94. The sex ratio was uneven in most size groups and in most of the months. The modal class size was 81-90 mm Carapace Width (CW) in male and 71-80 mm in female. The monthly size-frequency distribution exhibited some variations. The relationship between carapace width and body weight were estimated as W = -128.25+4.06 CW, log W = -3.73+3.06 log CW or, W = 0.0078 CW3.06 for male and W = -89.59+2.387 CW, logW = -1.6035+1.8928 log CW or, W = 0.005 CW1.8928 for female. The condition factor of male crabs showed two peaks; first in 61-70 mm and second in 121-130 mm size group. In case of female it was highest in 61-70 mm size group. The relative condition factor was maximum at 125.5 mm CW and 65.5 mm CW in male and female, respectively. Gonadosomatic Index showed a single peak during May to July for female crabs.
  K. Azam , S. Pervin , S.S. Naher , Y. Ali , M.I. Alam , K.M.B. Haque and B. Ahmed
  The investigation was carried out to evaluate the shelf life of Pangus (Pangasius hypopthalamus) stored in ice in relation to size and season. Samples collected from different ghers in Khulna region of Bangladesh during April 2002 to January 2003 were assessed both in summer and winter for three sizes of fish (large, medium and small). Quality deterioration was studied for 18 days by organoleptic and biochemical (TVB-N, TMA-N and pH) parameters. In summer, for large fish, the keeping time varied between 10 to 12 days when the value of TVB-N, TMA-N and pH ranged between 17.88 ± 0.97 to 24.12± 0.08, 4.43± 1.47 to 5.23± 1.05 mg N/100 g and 6.75± 0.50 to 7± 0.08; while the acceptability limit in winter was the 10th day. Within this period, the value of TVB-N, TMA-N and pH was 17.04 ± 1.02, 4.03 ± 0.84 mg N/100 g and 6.64± 0.09, respectively. In case of medium fish during summer, the shelf life was 12 days when the value of TVB-N, TMA-N and pH was 22.46± 1.36, 5.47 ± 0.54 mg N/100 g and 6.8 ± 0.08. The shelf life in winter season was found on the 10th day. At that time, the value of TVB-N, TMA-N and pH was 15.08 ± 0.06, 4.78 ± 0.84 mg N/100 g and 6.2 ± 0.04. For small fish, in summer, the rejection time was on the 10th day and the value of TVB-N, TMA-N and pH was 19.71 ± 1.05, 4.61 ± 0.74 mg N/100 g and 6.86 ± 0.05. However in winter, the just acceptability limit was found on the 10th day. The value of TVB-N, TMA-N and pH was 18.32 ± 0.58, 4.52 ± 0.68 mg N/100 g and 6.78 ± 0.50 during this period.
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