M. J. Vagg
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Magnesium and milk fever
There is clinical, experimental and theoretical evidence for a connection between the occurrence of subclinical hypomagnesaemia and the incidence of milk fever. Clinically, pregnant dry cows in dairy… Expand
The absorption of dietary manganese by dairy cows.
Additional manganese, sufficient to increase the dietary concentration to approximately 1000 mg/kg, was administered to one cow for four and another for seven days. Manganese concentrations in portal… Expand
The effect of ammonium chloride induced acidosis on calcium metabolism in ruminants.
SUMMARY A mild acidosis was induced in goats and cows by oral administration of ammonium chloride. The effects of this treatment on the accretion rate of calcium into bone and on the size of the… Expand
Use of the field vole (M. agrestis) for monitoring potentially harmful elements in the environment
Abstract The behaviour and life-cycle of the field vole (M. agrestis) suggested that it might be a promising indicator species by which to estimate the hazards to wild life or grazing animals of… Expand
The effects of reducing manger space on dairy cow behaviour and production
The manger space for a group of 30 cows was reduced from 105 cm to 15 cm per cow during a period of six weeks. Before each reduction in manger space the cows were observed for 24 hours and their… Expand
The effects of Solanum malacoxylon on calcium metabolism in cattle.
Summary The absorption of calcium from the diet of 2 dry barren cows was increased from less than 10% during a control period to between 40 and 50% during a period when 200 mg./kg. body weight/week… Expand
Selenium concentration in the blood and wool and glutathione peroxidase activity in the blood of three breeds of sheep.
The activity of the enzyme glutathione peroxidase (GSH-Px) in whole blood and the selenium concentrations in whole blood and wool were measured in samples taken from 15 Scottish Blackface, 16 Welsh… Expand
Field trial to determine the efficacy of two doses of 1 alpha-hydroxycholecalciferol in the prevention of milk fever
The efficacy of 1 alpha-hydroxycholecalciferol (1 alpha-HCC) for the prevention of milk fever has been tested in a controlled field trial using a total of 601 cows on 18 farms with a history of a… Expand
Effects of selenium and copper supplementation on the growth of beef steers
During the grazing seasons of 1978 and 1979, 126 Hereford cross Friesian and 25 Charolais cross Friesian steers were used in controlled trials of the effects of injecting them with copper and, or,… Expand
Study of combined injections of 1 alpha-hydroxy-cholecaldiferol and cloprostenol in the prevention of parturient paresis
Dairy cows were injected with 1 alpha-hydroxycholecalciferol (1 alpha-HCC) and, or, cloprostenol at 275 days of gestation. Blood samples were taken daily from 270 days of gestation until seven days… Expand