Postępy Nauk Rolniczych > 1997 > 44 > 3 > 73-82
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journal ISSN : | 0032-5547 |
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Bibliography
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[1] Broderick G.A. 1995. Performance of lactating dairy cows fed either alfalfa silage or alfalfa hay as the sole forage. Jour. of Dai. Sci. 78(2): 320-329.
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[2] Carlsson J., Bergström J., Pehrson B. 1994. Variations with breed, age, season, yield, stage, of lactation and herd in the concentration of urea in bulk milk and in invidual cows milk. Vet. Inst. Swedish Univ. of Agric. Sci. Skara, Diss. 1-14.
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[3] Carlsson J., Pehrson B. 1994. The influence of the dietary balance between energy and protein on milk urea concentration. Experimental trials asseassed by two different protein evaluation systems. Acta Vet. Scand. 35(2): 193-205.