Results 41 to 50 of about 11,907 (273)
Association between age at first calving and milk production in first lactation on longevity traits in Holstein cows [PDF]
Biotechnology in Animal Husbandry, 2020 The objective of this research was to determine the association between age at first calving (AFC) and milk production in the first lactation of longevity traits for Holstein cows. The research was conducted on 2307 cows raised on 4 farms in AP Vojvodina.
Kučević Denis +6 more
doaj
Productive life in buffalo cows and effect of some factors on it
Italian Journal of Animal Science, 2010 Subject of investigation were 3989 buffaloes from the Bulgarian Murrah breed during the period 1976 – 2003. The productive life (PL) is determined as the period between date of first calving to the date of last milking, before culling.
T. Peeva, Y. Ilieva
doaj +1 more source
The age at first calving and the longevity of beef cows in Hungary [PDF]
Archives Animal Breeding, 2006 Abstract. The length of time beef cows spend in production is an important component of the rentability of beef cattle husbandry. In spite of this fact, very few publications have dealt with this trait, either in Hungary or abroad. Therefore the aim of the present study was to evaluate some of the age parameters of beef cows related to the production ...
Dákay, I. +5 more
openaire +2 more sources
Journal of Dairy Science: This study aims to determine the effects of feeding, management, and reproductive strategies used to reduce age at first calving (AFC) on production and reproductive performance through meta-analytic methods.
A.K.G. Lean +5 more
doaj +1 more source
Genetic improvement of Nellore cattle in the semi-arid region of northeastern Brazil
Acta Scientiarum: Animal Sciences, 2015 The semi-arid region of Brazil represents approximately 57% of the northeastern territory. The main economic activity in this region is agriculture and livestock, in most cases, using traditional technologies.
Ana Carla Borges Barbosa +5 more
doaj +1 more source
Field progeny testing of Frieswal bulls - Retrospective and perspective
Indian Journal of Animal Sciences, 2022 Young Frieswal bulls (334; cross of HF and Sahiwal) were put under test mating in 16 different sets at four states located in varied agro-climatic conditions of India.
A K DAS +5 more
doaj +1 more source
Spanish Journal of Agricultural Research, 2014 A deterministic simulation was conducted to assess the effects of sexed semen utilization strategies on age at first calving (AFC). Four different strategies were implemented on dairy heifers: continuous use of conventional semen only (CC), continuous ...
Sahereh Joezy-Shekalgorabi +3 more
doaj +1 more source
Accounting for animal health in efficiency analysis: An application to Swedish dairy farms
American Journal of Agricultural Economics, EarlyView.Abstract Poor animal health is a central concern in modern livestock production. Despite the necessity to incorporate animal health in efficiency analysis, the theoretical and empirical developments are limited on this subject. This article appropriately characterizes the axiomatic properties of animal health within a production framework.
Frederic Ang +3 more
wiley +1 more source
Journal of Dairy Science, 1917 The most desirable age for the first parturition with cows is a very important question. In a great many herds it is certain that the method of raising heifers is not such as to permit full development of their inherited powers of production. Prof. F. W. WQll in Research Bulletin No.
openaire +1 more source
Age at first calving and calving interval.
, 2018 Back-transformed predicted means (± 95% confidence intervals) obtained from mixed effects multivariable regression modelling for calving interval (days) by different age at first calving (AFC) class.
Amy Coates (5390834) +5 more
core +1 more source