This article presents the results of a comparative study of milk productivity and certain biological characteristics of Simmental and Black-and- White cows under farm conditions in Sherobod District, Surkhandarya Region, Uzbekistan, during 2025–2026. The study involved 24 first-calving cows, including 12 purebred Black-and-White cows and 12 Simmental cows. Milk productivity, milk fat and protein content, lactation duration, reproductive characteristics, and adaptability were investigated.
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Rajaboy et al. (2026) studied this question.
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