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Articles by M. A. Rahman
Total Records ( 7 ) for M. A. Rahman
  M. Robiul Alam , M. O. Hoque , M. A. Rahman , F. Islam , M. Akhtar Hossain and M. S. H. Molla
  An experiment was conducted at Agricultural Research Station of Bangladesh Agricultural Research Institute (BARI), Pabna during April to August 2001 to see the effect of weed control methods on the growth and yield of rainfed aus rice (CV. BR16). Plant height, effective tillers plant -1, length of panicle, filled grains panicle -1, unfilled grains panicle -1, 1000-grain weight and grain yield were significantly influenced due to different treatments. The maximum number of effective tillers plant -1 (3.60), filled grains panicle -1 (50.54) and grain yield (3.02 t ha -1) were obtained from T5 treatment (Ronstar @ 2.0 L ha -1), which was closely followed by T2 treatment (two hand weeding). The minimum number of effective tillers plant -1 ( 2.30), filled grains panicle -1 (41.32) and grain yield (2.27 t ha -1) were observed in control treatment.
  M. A. Rahman , F. Begum and M. S. Islam
  A total of 330 water samples obtained from different sources in three different seasons were examined for the evidence of bacterial pollution and physico-chemical properties of water. The densities of total coliforms ranged from 0-6 to $ 2400, fecal coliforms 0-2 to $ 2400 and total bacterial count (log10) 0.07-0.42 to 3.95-8.91 per 100 ml. of water samples of different seasons. The degree of pollution was the highest in pond for public use in all seasons and the lowest in deep tubewell in winter and aqua mineral. E.coli, Fe.Streptococci, Salmonella and Shigella were found highest 80, 58, 46 and 58% respectively in water of ponds for public use irrespective of season. No Salmonella and Shigella were detected in deep tubewell and aqua mineral. The physico-chemical parameters of water were determined.
  F. Begum , M. S. Islam , M. A. Rahman and H. Rahman
  A total of 90 water samples obtained from various sources (tubewell, reservoir tank, tap supply, pond, river and aqua mineral) collected in three seasons were examined for their water quality based on total bacterial count and physico-chemical properties. The combined effect of physico-chemical properties of water on the growth and propagation of bacteria was highly significant (P<0.01) in pond and river water and very poor and insignificant (P<0.05) in tubewell, reservoir tank, tap and aqua mineral water. One hundred sixty four isolates of enteric bacteria including Escheria coIi, fecal Streptococci, Salmonella and Shigella were examined for their sensitivity to antibiotics. The study revealed that 7.0 to 32% of isolates were resistant to tetracycline followed by ampicillin and streptomycin. Resistance to Chloramphenicol was of moderate degree (3 to 14%) and that to Ampicillin, Kenamycin and Gentamycin was relatively low (0.82 to 7.02%). E. coli possessed the highest antibiotic resistance and was most widespread among the bacterial isolates obtained from pond water.
  M. A. Rahman , A. Khair , B.K. Bala , A.K.M. S. Islam and F. M. Rabbi
  Formation of structured water by dissolution of non-polar gas increases the viscosity of water and results in suppression of metabolic activity due to the resultant low rate of enzymic reaction. This phenomenon was applied to extend the storage life of eggplant fruits using Xe gas. Two combinations of temperatures and partial pressures of Xe were investigated. The respiration rates in Xe treated samples were found to be 10.1 and 11.9 mgCO2 kg-1 h-1, for 10 and 15 oC, respectively and were less than those of control. The Xe treated samples showed a lower respiration rate. The calyx was not deteriorated and flesh browning was not observed. Weight loss did not differ significantly, however lower in the treated sample. Therefore, the Xe treatment was found to be effective for extending the storage life of eggplant fruits.
  S. M. Jobair Hossain , M. A. I. Khan , M. A. Rahman , M. A. Hossain , S. S. Haque and G. R. Janardhana
  A study was undertaken to find the biodiversity of Fusarium spp. on stored cereal grains (maize, sorghum and paddy) collected from different places of Karnataka State, India by testing seed health. Altogether ten Fusarium species were found to be associated with different cereals such as, F. moniliforme (25.35%), F. graminearum (15.5%), F. proliferatum (14%), F. oxysporum (12.68%), F. avenaceum (9.86%), F. subglutinans (8.45%), F. semitectum (5.63%), F. poae (4.22%), F. sporotrichiodes (2.81%) and F. anthophilum (1.40%). The occurrence of Fusarium species were higher in maize 43.66%, followed by sorghum 38.02% and very low in paddy 18.31%. Among them F. moniliforme, F. avenaceum, F. subglutinans, F. semitectum, F. graminearum and F. oxysporum were common on all the three cereal grains.
  M. S. Islam , M. Ibrahim , M. A. Rahman , M. A. Uddin and S. K. Biswas
  A study was carried out on six litchi varieties, for their fruit characteristics, bio-chemical composition and storage behaviour. The results showed significant difference among varieties. The fruit weight ranged from 14.36-23.97 g, percent recovery of flesh 60.58 - 71.16, TSS 16.78-19.55% and total sugar 10.0-19.2%. Rottage loss was highest in Green (81.86%) and the lowest in China-3 (37.03%). None of the varieties was found superior in all respect. However, considering the important characteristics, the fruits of BARI litchi-1 and China-3 were considered highly acceptable.
  M. A. Uddin , M. S. Islam , M. A. Rahman , M. M. Begum and A. T. M. Hasanuzzaman
  The experiments were conducted on 12 mango graft varieties/cultivars viz. BARI mango-1, BARI mango-2, BARI mango-3 (Amrapali), Fazli, Gopalbhog, Khirsapat, Kazla sinduri, Kazla-01(Subarna), Langra, Mallika, Rad and seedling (stock plant) on the incidence of mango leaf cutting weevil (Deporaus marginatus P.), its extent of damage to mango leaves and the effectiveness of non-chemical and chemical (insecticide) for control. The highest infestation of 52.55% leaves recorded in BARI mango-3 (Amrapali) followed by Rad, Mallika, BARI mango-1 and BARI mango-2 and the lowest infestation of 13.78 and 18.55% found in Langra and Gopalbhog followed by Kazla-01 and Khirsapath. The other three varieties sustained 27.49-30.64 % leaf damage. To control the mango leaf cutting weevil bagging with mosquito net and bagging with polythin bag had the best performance with 100% reduction of leaf infestation followed by spraying of Ripcord. Spraying of Decis caused 82.23 % reduction of leaf damage followed by Sevin, Azodrin and Diazinon with the least control efficiency of Sumithion.
 
 
 
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