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Articles by M.N. Bari
Total Records ( 4 ) for M.N. Bari
  B.K. Mitra , A.J.M.S. Karim , M.M. Haque , G.J.U. Ahmed and M.N. Bari
  An experiment was conducted at the Bangabandhu Sheikh Mujibur Rahman Agricultural University, Bangladesh during June to December 2002 to find out the effective weed control practices in terms of weed dynamics, weed control efficiency and the performance of transplanted aman rice. Fimbristylis miliacea, Scirpus murconatus and Monochoria vaginalis were found as dominant weed species in transplanted aman rice. Two times weeding was found as the best practice to keep weed infestation at minimum level and to ensure higher yield of transplanted aman rice. Other than weed free condition, the highest grain yield (5.07 t ha-1) was produced in two hand weeding and the lowest (2.46 t ha-1) was in unweeded condition. One hand weeding at 25 DAT along with one mechanical weeding at around 40 DAT was also found to be effective next to two hand weeding in these regards. Pre emergence herbicide Refit 500 EC was not effective to keep weed infestation at minimum level and to ensure higher yield of transplanted aman rice.
  Mahfuj Ara Begum , Mahbuba Jahan , M.N. Bari , M. Mofazzel Hossain and N. Afsana
  Life cycle of Micraspis discolor (Fabricious), a predator of brown plant hopper (BPH), Nilaparvata lugens (Stal) was studied in the laboratory and its potentiality in biological control was investigated. A female M. discolor laid an average of 117.7 eggs in 25.1 days of oviposition period. Preoviposition period ranged from 5-10 days with an average of 6.6 days. The eggs hatched in 2-3 days with 83.7% hatching success. Predator had 4 larval instars requiring a total period of 12-15 days. Mean developmental period of the predator was 20.2 days. Male and female beetles lived for 27.4 and 32.4 days respectively. A predator larva consumed an average of 47.6 third instar brown plant hopper, while an adult beetle consumed an average of 112.6 BPH during 30 days after emergence. Predator, M. discolor both in larval and adult stage showed preference for second and third instar brown plant hopper.
  M. Mofazzel Hossain , M. Shahjahan , M. Mosaddeque Hossain and M.N. Bari
  The highest chlorophyll `a` content was recorded in the variety BLO 101 (0.74) and was found significantly different from other varieties/lines except BLO 114 and khotkhotia-1. The lowest amount of chlorophyll `a` content was observed in the variety Nayankajal (0.43), which was also significantly different from that of other varieties/lines. The chlorophyll `a` content was negatively correlated (-0.146) with brinjal shoot and fruit borer (BSFB) infestation. The highest chlorophyll `b` content was recorded at 70 DAT. The amount of chlorophyll `b` varied significantly among the varieties/lines at different ages. The lowest chlorophyll `b` content was recorded at 40 DAT (0.26) and it was statistically identical with that of 100 DAT (0.30). The average highest amount of chlorophyll `b` was estimated in the variety Dhohazari-1 (0.45), which was significantly different from that of other varieties/lines except BLO 45. The lowest amount of chlorophyll `b` was obtained in the variety Laffa (0.25), which was significantly different from that of all other varieties/lines. The highest amount of total chlorophyll contents was estimated in the variety BLO 114 (1.109) which was significantly different from that of other varieties/lines. The average lowest amount of total chlorophyll was estimated in the variety Nayankajal (0.83) with the highest infestation.
  S.S. Dipti , M.N. Bari and K.A. Kabir
  Grain quality characteristics of ten Beruin rice varieties were studied in the laboratory of the Grain Quality and Nutrition Division of Bangladesh Rice Research Institute and compared with a popular sticky local rice variety, Ranga Binni. Thousand paddy weights of the tested varieties ranged between 14.3 g to 25.5 g. Milling out turn of the tested varieties were satisfactory compared to the check variety and ranged from 68% to 71%. Head rice out turn of four varieties was unsatisfactory out of 10 varieties. Head rice out turn of the tested varieties ranged 33 to 91%. All the Beruin varieties had opaque grain but appearance of seven varieties were good and remaining three were fair. The length and breadth of the milled rice ranged from 4.5 to 5.7 and 1.7 to 2.4, respectively. Likewise, length to breadth ratio of the varieties ranged from 2.0 to 2.8 and size and shape of all the varieties were medium bold except two. All the varieties contained low amylose ranged from 7.9 to 10% including the check variety. Protein percent of the varieties ranged from 6.2 to 9.4. Cooking time of the Beruin varieties were more or less similar and ranged from 14 minutes to 17.5 minutes. Elongation and Imbibition ratio of the varieties ranged form 1.3 to 1.6 and 3.0 to 4.3, respectively.
 
 
 
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