Results 61 to 70 of about 46,786 (294)
GENETIC ANALYSIS OF REPRODUCTIVE TRAITS IN BALI CATTLE MAINTAINED ON RANGE UNDER ARTIFICIALLY AND NATURALLY BRED [PDF]
Journal of the Indonesian Tropical Animal Agriculture, 2011 The aim of this study was to evaluate genetic analysis including heritability and further phenotypic and genetic trends of reproductive traits in Bali cattle.
A. Gunawan, R. Sari, Y. Parwoto
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
Journal of Dairy Science, 1985 Mean ages at first calving were computed from over 6 million cow records from 1960 through 1982 for six breeds. Average Jerseys first calved at 26.18 mo compared with 28.75 mo for Ayrshires. Other breed means were intermediate: Holsteins, 27.52 mo; Guernseys, 27.72 mo; Brown Swiss, 28.04 mo; and Milking Shorthorns, 28.11 mo.
openaire +2 more sources
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
Livestock Science, 2019 We aimed to evaluate multiple-trait Bayesian models for handling censored records in genetic evaluations of age at first calving (AFC) and stayability (STAY) in Nellore cattle.
E. V. Costa +5 more
semanticscholar +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
Comparison of the effects of high and low milk-replacer feeding regimens on health and growth of crossbred dairy heifers [PDF]
, 2019 Context: Pre-weaning growth in dairy heifers is highly dependent on the amount of milk fed. Both milk replacer (MR) and associated labour are costly, encouraging restricted milk rations and once-a-day feeding.
Johnson, Kate F. +2 more
core +3 more sources
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