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Articles by M. N. Islam
Total Records ( 10 ) for M. N. Islam
  M. M. Rahman , M. N. Islam , S. Faruque and B. K. Roy
  Calving records with sex ratio of births were studied in summer, monsoon and winter of local, crossbred and purebred cows. The higher percentage of birth found during summer (39.07%) followed by winter (32.79%) and monsoon (28.14%) and female and male ratio were 48.25:51.75; 44.66:55.34 and 40.83:59.17, respectively in summer, monsoon and winter in local cows; whereas in crossbred cows, birth percentage is highest in summer (36.96%) followed by winter (35.98%) and monsoon (27.06%) and no significant difference were found on sex ratio of births of crossbred cows. The highest percentage of birth of purebred at Holstein-Friesian and Sahiwal cows are noted in winter (40.93%) followed by monsoon (30.48%) and summer (28.59%) and no significant difference were found on sex ratio of births of purebred cows in different seasons.
  M. Maniruzzaman , M. M. Alam , F. I. M. Golam Wahed Sarker , M. T. Islam and M. N. Islam
  This study was undertaken at two locations in the central part of Bangladesh to assess the performance of PVC and plastic pipe water distribution system for command area development and irrigation time saving by minimizing water losses. In the system, total discharge from deep tubewell (DTW) was diverted to two or three directions by using PVC and plastic pipe of different lengths and diameters. Technical and economic feasibility of the system were also evaluated. The conveyance loss was 2.80 to 9.50% in PVC and plastic pipe whereas in earthen channel it varied from 30 to 33% in silty-clay loam soil, which indicates that on an average 83% water can be saved by improved pipe distribution system. The maximum pressure head in two-way flow condition was 4.25 m. The total head of DTW developed due to the pipe distribution system was 16.52 m at the peak irrigation period, which was below the limit of the total head of the DTW and did not create any problem on pump unit. The motor speed varied from 1490-1500 rpm in two-way or three-way flow conditions, which did not create any back-pressure on pump. By introducing the pipe distribution system about 37 to 41% command area was increased in both locations. The BCR of the pipe irrigation system varied from 2.74 to 1.43 on the basis of 15 to 45% discount rates. The partial pipe distribution system in DTW area was highly economical considering the BCR and IRR analysis.
  M. N. Islam , M. N. Islam , M. M. Rahman and S. Faruque
  In the study areas records of 100 dairy cows collected from small holder dairy farms out of which were 20 Friesian cross, 19 Sahiwal cross, 29 Sindhi cross, 32 indigenous dairy cows. Those dairy farm were considered to evaluate post partum heat period, dry period, services per conception (SPC), age at first calving, calving to first service, lactation period and calving interval. The average post partum heat period of Friesian cross, Sahiwal cross, Sindhi cross and indigenous dairy cows were 98.75 ± 40.58, 97.63 ± 36.03, 114.65 ± 21.54 and 108.46 ± 36.32 days, respectively and the average length of dry period were 127 ± 46.66, 136.05 ± 23.42, 138.39 ± 41.78 and 170.00 ± 68.89 days, respectively. The average services per conception for Friesian cross, Sahiwal cross, Sindhi cross and indigenous dairy cows were 1.65 ± 1.65, 2.05 ± 1.17, 2.206 ± 1.01 and 1.41 ± 0.56, respectively and age at first calving were 36.25 ± 3.48, 37.26 ± 3.01, 37.65 ± 5.21 and 40.03 ± 3.54 months, respectively. Calving to first service of different crossbred and indigenous dairy cows were 109+ 37.26, 114.47 ± 38.89, 113.10 ± 27.20 and 124.53 ± 43.33 days and calving interval were 373.25 ± 35.25, 383.42 ± 34.44, 397.77 ± 37.07 and 418.78 ± 36.74 days, respectively. The length of lactation period of different crossbred and indigenous dairy cows was 253 ± 24.73, 256.31 ± 24.31, 255.86 ± 27.58 and 230.62 ± 30.68 days, respectively. The post partum heat period and calving to first service did not differ significantly among the different crossbred and indigenous dairy cows. The traits like, services per conception, age at first calving, calving interval and lactation period however differed highly significantly (P<0.01). The dry period also significantly (p<0.05) different among the genetic groups. The results obtained in this study indicated the reproductive performances of crossbred cows were superior to indigenous cows.
  Md. Mujibur Rahman , M. N. Islam and M. A. Taher
  An investigation was made on the Haizda Embankment project in the Haor area of Netrokona district to evaluate the goals and objectives of the project. Data collected from 50 farmers, 20 project staff, local government officials and expert through a structured questionnaire. Both pre-project and post-project situations were taken into consideration. The agricultural and social development were appraised on land use, use of seed variety, fertilizer use, water management, labour employment, yearly income of the farmers, land ownership, use of insecticides, transportation facility and educational changes. The pre-project and post-project scenario in the above mentioned aspects were statistically compared by means of t-test. Significant improvements in almost all the aspects were found at the post-project condition. On the other hand analyzing highest water levels of the area, it was found that the water level significantly increased outside the embankment after the project construction, which also increased the vulnerability of livelihood. At the same time fish production in Mohanganj Thana significantly decreased after the embankment construction and also decreasing rate is continuing. The fisheries ecology have been changed in the poldered area because of (i) free entrance of water is prevented at low flood level, (ii) the requirement and spawning ground of major fish species have been interrupted and (iii) decreased the opportunity of capture fishing in the project area. So, planners should consider the related adverse effects on nature and environment and its remedial measures during the planning of this type of small-scale water resources development project.
  M. S. Mazumder , M. K. Hossain , M. N. Islam and Kh. N. Islam
  The study was conducted to investigate the opinion about reproductive behavior commodity participation in contraceptive mothers opinion about suitable contraceptive method during breastfeeding in Bangladesh. For this purpose secondary data were collected from Bangladesh Institute of Research for Promotion of Essential and Reproductive Health and Technologies (BIRPERHT), in Bangladesh in the year 1995. The contraceptive effectiveness of lactational amenorrhoea during exclusive breastfeeding the baby, 35.6% mentioned that this period is fully protective from risk of contraception; about 37.9% stated that there is a partial risk of pregnancy. The suckling of the infant appears to trigger the chain of events. Stimulating the hypothalamus and anterior pituitary to release some hormones and inhibit the release of mothers. This has the total effect of suppressing ovulation with contraceptive effect being strongest during lactational period. Mothers in rural and urban area may choose to adopt a contraceptive method during breastfeeding and that is suitable method in this period oral pill 33% and condom 28% by their opinions. The overall distribution of opinion about risk of conception reflects that significantly larger proportion with 99% confidence level of urban mothers think that lactational period does not provide adequate protection from conception. Mothers should be informed about the maternal health benefit of breastfeeding including lactational period and its contraceptive effect, which increases birth interval and maintain good health of the mothers.
  P. K. Sarker , S. Rahman , M. M. Rahman , S. C. Chakraborty and M. N. Islam
  A laboratory trial was conducted on the protein digestibility of rohu (Labeo rohita) fingerlings in a static indoor fish rearing water system of glass made aquaria (90 cm x 30 cm x 30 cm) for a period of 75 days. Each treatment had two replicates containing 12 fingerlings. Five experimental diets A, B, C, D and E were prepared from different combination of five major sources of protein viz., fish meal, protein concentrate, meat & bone meal, mix of animal protein sources and mix of plant protein sources each containing 33% dietary protein level. The apparent protein digestibility (APD) values of the above mentioned diets were 81.70, 78.66, 75.53, 72.53 and 69.96%.
  Md. Ziaul Ahsan Chowdhury , M. N. Uddin , M. N. Islam and M. S. Islam
  The study was undertaken to determine the economic performance of tossa (Corchorus olitorius ) jute at growers level. The results revealed that per hectare average cost of production of Tossa Jute were Tk.16538.91 and Tk.8106.09 on variable cost and cash cost basis, respectively while per hectare gross return was estimated to Tk.28375.85. The average yield of Tossa jute was 1720.16 kg ha -1. The yield was higher in Faridpur (1826.40 kg ha -1) compared to Rangpur (1669.07 kg ha -1 ) and Dhaka (1665 kg ha -1 ). The gross margins were Tk.11836.94 ha -1 and Tk.20269.75 ha -1 on total variable cost and cash cost basis respectively. The average benefit-cost ratios were 1.72 and 3.50 respectively on total variable cost and cash cost basis. Lower price of fibre, non-availability of HYV seeds at proper time, shortage of buyers, high input cost, absence of fair price in terms of fibre quality etc. were addressed as problems by the farmers.
  M. Y. Ali , M. A. Islam , M. J. Alam and M. N. Islam
  Yogurt samples from ten different shops of Mymensingh Town and Laboratory made in 3 batches were analyzed in the Dairy Technology Laboratory, Department of Dairy Science, Bangladesh Agricultural University to monitor the quality. Significant difference in overall score of physical test (smell and taste, body and consistency, colour and texture), chemical (protein, fat, total solids, ash, acidity and PH) and microbiological status was found among different yogurt samples. Laboratory made yogurt was the best in quality. Dayamoy and Anil Gosh were in 2nd and 3rd position in quality of yogurt. This investigation suggested that adulterated milk must be avoided in yogurt preparation and also to follow strict hygienic condition in order to have
  Kamruzzaman M. , M. N. Islam , M. M. Rahman , S. Parvin and M. F. Rahman
  Different types of dahi were prepared by using banana juice and the prepared dahi samples were divided into two group having all types of dahi in each group. One group was covered with paper on the top of the cup and another group was without covered and were kept inside the refrigerator having a temperature of approximately 50 oC for a 16 days storage period. The removal of moisture percentage was measured every four days of interval during storage. The evaporation rate (gm/d) of dahi samples was also calculated by how much amount of water was removed per day during storage. The removal of moisture percentage and evaporation rate (g/d) of dahi samples of with cover group was lower than that of dahi samples of without cover group and evaporation rate of dahi samples of both with cover and without cover group was increased gradually due to incorporation of banana juice.
  M. Kamruzzaman , M. N. Islam and M. M. Rahman
  Two types of dahi were prepared. One type was prepared by using 10, 20 and 30% banana juice with whole milk and another one (plain dahi) was prepared by using whole milk only. Dahi samples were stored both in room temperature and refrigeration temperature until deterioration. During storage samples were analyzed for getting the organoleptic quality (Smell and Taste, Body and Consistency, Colour and Texture), percentage of acidity and pH value. Organoleptic quality and pH value of different types of dahi samples decreased but acidity percentage increased during storage at both room and refrigeration temperature. Plain dahi was in good condition up to 3 days of storage period and banana juice based dahi was up to 2 days only at room temperature. On the other hand, at refrigeration temperature plain dahi was suitable for consumption up to 12 days and banana juice based dahi was up to 8 days. Keeping quality of banana juice based dahi was lower than that of plain dahi both under room and refrigeration temperature.
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