Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2002.97.100HaqueM.N. AzizS.A. ChandaS.S. HossainM.I. BasetM.A. 1200251Various milking and reproductive performances were analyzed. The effects of concentrate feed were found significant on age at weaning AW (p<0.001) age at first heat (AFH) (P<0.05) age at first conception (AFH) (P<0.001) No. of services per conception (P<0.05), age at first calving (P<0.001) post partum heat period (PPHP) (P<0.001), calving interval (Cl) (P<0.001), daily milk yield (p<0.05) and lactation length LL (P<0.001). The effects of management level were significant on AW (P<0.001), PPHP (P<0.01), CI (P<0.001) and daily milk yield (P<0.05). The overall mean values were 245.80± 3.80 days for AW, 35.30±0.40 months for AFH, 37.20± 0.70 monthly for conception, 46.20±0.40 monthly for AF calving, 1.30±0.10 for no. of services for conception, 182.90± 4.80 days for PPHP, 15.50±0.20 months for CI, 2.50±0.30 kg for daily milk yield and 250.60±4.50 days for lactation length.]]>Ashraf, A.,19981998BBS.,19981998Bhuiyan, A.K.F.H. and R. Sultana,199420355358Chaudhury, M.Z., M.J. Tahir and M. Rafique,19947383387Hafez, E.S.E., 19936th Edn.,Hossain, M.A. and S.F. Routledge,19821982pp: 161167Hussain, S.S. and K.G. Mostofa,1985101519Islam, S.S.,19951995Jahan, S., M.M.R. Howlader, S.M.Z.H. Chowdhury, N. Nahar and M.F. Rahman,199074849Majid, M.A., T.N. Nahar, A.I. Talukder and M.A. Rahman,199826371Nahar, T.N., M. Islam and M.A. Hasnath,19925435438Rahman, M.F., N. Ahmed and A.R. Ahmed,1987215561Rahman, M.F., N. Islam, M.A. Hossain, M.A.M. Prodhan and A. Rahman,199311924Rahman, M.S.,19921992pp: 8488Sultana, R.,19951995