Results 121 to 130 of about 6,503,587 (307)
Are dairy cows replaced too early? Evidence from a structural model and cow‐level data
American Journal of Agricultural Economics, EarlyView.Abstract In past analyses of animal replacement decisions, studies have claimed that dairy farms often replace dairy cows too early to be maximizing profits. I estimate a structural model of asset replacement to determine the motives behind early replacement of dairy cows.
Jared P. Hutchins
wiley +1 more source
Cow-Calf Beef Production with Irrigated Forages [PDF]
, 1978 The Conservancy District were in cooperation with the Experiment Station for the purposes of the development of the facilities and research program. Their prime directive was to measure beef production per irrigated acre with a beef cow-calf enterprise ...
Dunn, Barry H., Olson, Howard M.
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Dingo baiting did not reduce fetal/calf loss in beef cattle in northern South Australia
, 2019 Beef cattle production is the major agricultural pursuit in the arid rangelands of Australia. Dingo predation is often considered a significant threat to production in rangeland beef herds, but there is a need for improved understanding of the effects ...
Heather Miller +17 more
core +1 more source
Early stages of tooth development in the harbor porpoise Phocoena phocoena
The Anatomical Record, EarlyView.Abstract Here we describe the stages of tooth development in toothed whales on the basis of the harbor porpoise (Phocoena phocoena). The aim of the study was to find out whether these stages are identical to those of other mammals analyzed so far although toothed whales are homodont and monophyodont.
Lasse M. Mathes +2 more
wiley +1 more source
The Economics of Rotational Grazing in the Gulf Coast Region: Costs, Returns, and Labor Considerations, Phase II [PDF]
Profitability and labor associated with rotational grazing at three stocking rates and continuous grazing at a medium stocking rate are compared. On a per-acre basis, profits are lowest for low stocking rate rotational grazing.
Blouin, David +6 more
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Mastitis incidence and milk quality in organic dairy farms which use suckling systems in calf rearing [PDF]
, 2008 In order to identify important factors influencing animal health and general disease resistance, detailed qualitative and quantitative farm data were collected from 99 organic dairy farms in the Netherlands. Mastitis incidence and milk quality were focal
Smolders, E.A.A. +2 more
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The “costly son” hypothesis: Sons exacerbate obstetrical dilemmas in humans and other mammals
The Anatomical Record, EarlyView.Abstract Human childbirth has often been considered uniquely difficult among mammals, yet recent evidence suggests that obstructed labor and fetopelvic disproportion are widespread across placental mammals. Here, we propose the “costly son” hypothesis: because male offspring are typically larger at birth, they impose greater obstetric risk on mothers ...
Nicole D. S. Grunstra +1 more
wiley +1 more source
Spotty and her calf photograph
, 1941 A cow named Spotty with her unusual two-headed calf, 1941. They were owned by W. A.
Campbells Photo Art (Photographer)
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Evaluation of Calf-fed and Long Yearling Production with Increasing Corn Price [PDF]
, 2008 An economic comparison of calf-fed and long-yearling production was conducted to determine the impact of increasing corn price on steer profitability. Corn prices of $2.50, $3.50, and $4.50/bu were used.
Klopfenstein, Terry J. +3 more
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The Anatomical Record, EarlyView.Abstract Nineteenth century excavations of the Ciply‐Malogne Phosphatic Chalk Formation in Hainaut, Belgium, yielded over 50 partial mosasaur skeletons, the majority of which were referred to the species Mosasaurus lemonnieri Dollo, 1889. In the years since, this taxon has experienced a complicated taxonomic history, and its exceptional hypodigm has ...
Henry S. Sharpe +3 more
wiley +1 more source