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Full-Text Articles in Life Sciences
New Insights Into The Management Of Ewes Over Summer And Autumn, Rob Kelly, Ian Ralph
New Insights Into The Management Of Ewes Over Summer And Autumn, Rob Kelly, Ian Ralph
Journal of the Department of Agriculture, Western Australia, Series 4
Recent research in Western Australia has provided new information on the effects of liveweight and liveweight change on wool production and quality, as well as lamb survival and growth. Liveweight and liveweight change in sheep reflect the animals' nutritional status, and this in turn directly influences their wool production and reproductive performance. The under-nutrition of sheep not only has an immediate effect on the animal's performance, but the research showed that it also produces a significant carry-over effect on wool and lamb production, even if the ewes have returned to good feed. These findings suggest that for the efficient management …
Differences Between Merino Strains And Studs, Roger Lewer
Differences Between Merino Strains And Studs, Roger Lewer
Journal of the Department of Agriculture, Western Australia, Series 4
When commercial wool growers select Merino rams they often use the following pattern: the buyers first consider the main strains of Merinos in Western Australia - Bungaree, Collinsville and Peppin. They then study the 550 studs and numerous non-stud ram breeders in this State. Having chosen a breeder, they examine the rams on offer and buy their annual requirements from among these. Until recently, no objective information has been available on the differences between studs and strains in Western Australia's agricultural areas. However, as part of a major study at the Department of Agriculture's Great Southern Agricultural Research Institute, these …
Summer Drenching Of Sheep : New Recommendations For High Rainfall Areas, Brown Besier, Jill Lyon
Summer Drenching Of Sheep : New Recommendations For High Rainfall Areas, Brown Besier, Jill Lyon
Journal of the Department of Agriculture, Western Australia, Series 4
'Summer drenching' has been a highly successful strategy for controlling sheep worms in Western Australia's winter rainfall regions for many years. Drenching to remove worm burdens in summer, when the risk of reinfection by worm larvae is low, is an efficient basis to year-round worm control. The Department of Agriculture recently altered its recommendations for the timing of summer drenches to take account of new findings regarding the survival of worm larvae over summer. It now recommends that sheep farmers give the first summer drench when the pasture is beginning to dry off, in spring in most locations. Experiments atMt …
The Accumulation And Run-Down Of Dieldrin In Wethers Grazed On Paddocks Previously Treated With Dieldrin, Tony Albertsen, Roy Casey, Keith Croker
The Accumulation And Run-Down Of Dieldrin In Wethers Grazed On Paddocks Previously Treated With Dieldrin, Tony Albertsen, Roy Casey, Keith Croker
Journal of the Department of Agriculture, Western Australia, Series 4
In mid 1987, the organochlorines (O/Cs) DDT, dieldrin, heptachlor and chlordane were deregistered for agricultural and horticultural use in Australia. These chemicals had been used widely, and land on several hundred Western Australian farms, particularly where potatoes had been grown, was contaminated with chemical residues. Livestock grazing pastures on such land was also contaminated, and our beef exports were threatened. In 1988, the Western Australian Department of Agriculture started a two-year project to collect information from sheep which were grazed on land that had previously been treated with O/Cs, particularly dieldrin. The levels of O/Cs in body and wool fats …