29
MAR
2022
Estimation of environmental effects on test day milk yield in Patch-faced Maritza sheep
P. Zhelyazkova*, D. Dimov Department of Animal Science, Faculty of Agronomy, Agricultural University, 4000 Plovdiv (Manuscript received 29 September 2021; accepted for publication 17 December 2021) Abstract. The aim of this study was to estimate environmental effects on test day milk
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MAY
2014
Effect of the age at first calving on test day production traits in black-and-white cows
Zh. Gergovska Abstract. The research has been carried out with cows of the Bulgarian black-and-white cattle in 10 farms from various regions in the country. The cows calved in the period 1995 – 2006. A total of 1460 cows are included with 2852 lactations from І-st to ІІІ-rd and respec
Continue Reading →07
MAY
2014
Effect of age at first calving on the evaluation of breeding potential of dairy cattle and its correlation to test day productivity
The research has been carried out with cows of the Bulgarian black-and-white cattle in 10 farms from various regions in the country. The cows calved in the period 1995 – 2006. A total of 1460 cows with 2852 lactations from І-st to ІІІ-rd and respectively 27228 controls have been inclu
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