Browsing 1994 Onderstepoort Journal of Veterinary Research, Volume 61, 1994 by Subject "Friesian cattle"

Browsing 1994 Onderstepoort Journal of Veterinary Research, Volume 61, 1994 by Subject "Friesian cattle"

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  • Effect of heat-stress on conception in a dairy-herd model in the Natal highlands of South Africa 
    Du Preez, J.H.; Willemse, J.J.C.; Van Ark, H.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1994)
    Regression models are proposed for predicting conception rate in a dairy herd under South African and especially Natal conditions. Conception rate (CR%) was related to mean monthly temperature-humidity index (THI) by ...