Results 121 to 130 of about 2,018,275 (336)
Evaluation of body condition score measured throughout lactation as an indicator of fertility in dairy cattle [PDF]
, 2004 Body condition score (BCS) records of primiparous Holstein cows were analyzed both as a single measure per animal and as repeated measures per sire of cow.
Banos, G, Brotherstone, S, Coffey, MP
core +1 more source
Boreas, EarlyView.Glacial erosion during the Last Glacial Maximum (LGM) has removed much evidence of earlier glaciations and interglacials in the European Alps. At Gröbminger Mitterberg (GM), beneath a blanket of LGM till, a distinctive sediment archive preserves deposits predating the LGM.
Gerit E. U. Griesmeier +7 more
wiley +1 more source
Milk production and survival of spring-calving carryover cows in New Zealand dairy herds : a thesis presented in partial fulfilment of the requirements for the degree of Master of Science in Animal Science at Massey University, Manawatu, New Zealand [PDF]
, 2017 Non-pregnant cows are generally culled from dairy herds and replaced with two-year-old heifers. Alternatively, non-pregnant cows can be dried-off at the end of lactation, retained for one year (carried over), before being mated and returned to a milking ...
Gardner, Rachel
core
Boreas, EarlyView.We present a 25‐stage reconstruction of the ice‐flow pattern evolution of the Scandinavian Ice Sheet based on mapping and analysis of ~240 000 subglacial lineations and lineation fields across Norway, Sweden, Finland, and parts of NW Russia. Our reconstruction uses a glacial geomorphological inversion approach, in which we generated 611 individual ...
Frances E. G. Butcher +9 more
wiley +1 more source
Animal, 2018 The calving interval (CI) can potentially impact the economic results of dairy farms. This study highlighted the most profitable CI and innovated by describing this optimum as a function of the feeding system of the farm.
A.-C. Dalcq +7 more
doaj +1 more source
Associations between the K232A polymorphism in the diacylglycerol-O-transferase 1 (DGAT1) gene and performance in Irish Holstein-Friesian dairy cattle [PDF]
, 2010 peer-reviewedSelection based on genetic polymorphisms requires accurate quantification of the effect or association of the polymorphisms with all traits of economic importance. The objective of this study was to estimate, using progeny performance data
Berry, Donagh +5 more
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Calculation of multiple-trait sire reliability for traits included in a dairy cattle fertility index [PDF]
, 2004 The advent of genetic evaluations for fertility traits in the UK offers valuable information to farmers that can be used to control fertility problems and safeguard against involuntary culling.
Banos, Georgios +5 more
core +1 more source
Length of Calving Interval and Average Milk Yield
Journal of Dairy Science, 1931 Summary Records published by Langmack (3) are considered with respect to the effect of length of calving interval on the average milk yield per day over the calving interval. The present data are confined to 186 Red Danish cows whose records in each case start with the cow's first calf and continue uninterruptedly through the nine following calvings ...
W.L. Gaines, J.R. Palfrey
openaire +1 more source
Environmentally adjusted productivity growth and shadow prices for dairy farms
Canadian Journal of Agricultural Economics/Revue canadienne d'agroeconomie, EarlyView.Abstract We estimate the environmentally adjusted productivity growth and shadow price for Ontario dairy farms. We use an input‐oriented directional distance function and farm‐level data from 2000 to 2020. First, we find that while GHG emissions per cow increase with higher milk yields, emission intensity decreases as milk yield per cow increases.
Bibek Dahal +2 more
wiley +1 more source
Scientific Papers Animal Science and BiotechnologiesThe objective of this study was to estimate the genetic parameters for reproductive traits in Romanian Spotted, Simmental type cattle breed using animal model.
Mircea Cătălin Rotar +3 more
doaj