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2 Abstract: The study was conducted at dairy and cattle improvement farm, Hathazari, Chittagong for a period of one year. A total of 82 dairy cows were selected during the period from June 03-July 04 and their information regarding milk production upto 180 days, productive and other reproductive parameters were recorded from farm record book. Average milk production (459.09±138.09 liter), calving interval (634.59±223.92 days), age at puberty (1205.02±313.80 days), service per conception (1.88±1.09), gestation length (273.08±7.48 days) and birth weight of fetuses (18.78±34 kg) were observed. The minimum and maximum value of these results was also observed. The highest milk production (487.54±109.73 liter) was found in the cows with parity number 4-8 and the second highest (456.84±169.58 liter) was found with the parity number 2 and the lowest milk production (445.79±86.64 liter) was found with the parity number 3. The average production of milk was observed (473.44±134.15 liter) in the cows required interval between 370- 590 days and 444.74±142.11 liter found in the cows required 591-1365 days. When the range of age at puberty was 1186-2270 days and 665-1185 days the average production of milk was 468.56±161.92 liter and 450.50±113.56 liter was observed, respectively. Comparatively more milk production was found (461.52±151.89 liter) in cows required less number of services per conception was 1-2 than the cows required more number of services per conception was 3-6 and their milk production was 452.84±96.60 liter. There was no any significance difference of production of milk among the different variables.

The present research work was undertaken to identify the quality milk production trend of Bangladesh Milk Production Co-operative Union Ltd. (Milk Vita) throughout the year. To achieve the objectives relevant data were collected during the period from January 1995 to December 1999 at different Milk Shed Area (MSA) of Milk Vita. Milk production trend of Baghabarighat and Takerhat MSA was differed significantly (p

The present research work was undertaken to identify the quantitative and qualitative trends of milk production of Baghabarighat Milk Shed Area of Milk Vita throughout the year from January, 2001 to December, 2005. It was observed that milk production trend of BMSA statistically significant (P

1 Abstract: This study was undertaken to find out the milk fat production trend both in qualitative and quantitative aspect and seasonal effect on it at Sree-Nagor Milk Shed Area (MSA) under Milk Vita in Munshigonj, Bangladesh. The experiment was conducted during the period of 1995 to 1999. Season had the tremendous effect on milk yield (l/d). The milk production showed highest in the month of June, lowest in January, August, September and December; but in other months of the year it seemed almost similar. However, the average fat value of milk at Sree-Nagor MSA followed almost a specific trend throughout the year. Furthermore, the average fat value of Sree-nagor MSA was in-significant (P>0.05) between different months of the experimental period, but that of each year (1995-1999) between different months were highly significant (P