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Articles 1 - 17 of 17
Full-Text Articles in Sheep and Goat Science
Seminar Proceedings: Goats And The Farming System. Bridgetown, August 14, 1986, L J.E Karlsson
Seminar Proceedings: Goats And The Farming System. Bridgetown, August 14, 1986, L J.E Karlsson
Agriculture reports
Definition of goat fibre types - John Karlsson New breeding regulations for goats - Jim Maddams Requirements for keepign feral goats - David Rees Managing aspect of gaot farmining - John Karlsson Sheep and goat fibre market outlook - Peter Eckersley Review of the Australian goat meat industry - Larry King Goast establishment options and costs - Bruce Shields Economic comparison of mohair, cashmere and sheep - Garry Parlevliet Angora mohair breeders of Australia Litd - Graham Larke Australian cashmere industry - Tod Kirwan Worms in goats and their control - Joan Eggleston Selling cashmere through the ACMC - Lucinda …
Survey Of Parasite Control Practices In Sheep And Cattle, J R. Edwards, R V R Gwynn, R A. Love, Richard Thomas Norris, G Dalton-Morgan, Brown Besier
Survey Of Parasite Control Practices In Sheep And Cattle, J R. Edwards, R V R Gwynn, R A. Love, Richard Thomas Norris, G Dalton-Morgan, Brown Besier
Technical Bulletins
Farms in the Albany, Esperance, Jerramungup and Katanning districts were surveyed to determine parasite control strategies currently used, to evaluate the adoption of recommended control practices and to detect areas of ineffective parasite control. For cattle, the number of drenches given in the low rainfall zone was higher than the number given in the high rainfall zone.
Pregnancy Diagnosis Using Ultrasound, M A C Johns
Pregnancy Diagnosis Using Ultrasound, M A C Johns
Journal of the Department of Agriculture, Western Australia, Series 4
Few Western Australian ewe flocks are diagnosed for pregnancy despite the precence of high numbers of barren ewes. Surveys of farm flocks in the early 1970s recorded that between 14 and 29 per cent of ewes failed to lamb each year.
Techniques for diagnosing pregnant ewes have been available for many years, but ultrasonic devices and computer technology have made it possible for skilled operators to determine whether ewes are pregnant and more importantly, whether they have one, two or more foetuses.
Once the number of pregnant ewes is known farmers can use labour more efficiently. They can minimise the …
Reproductive Wastage In Sheep, R W. Kelly
Reproductive Wastage In Sheep, R W. Kelly
Journal of the Department of Agriculture, Western Australia, Series 4
The average lambing performance of Western Australia's ewe flock fluctuates between 60 and 70 per cent. Although this level of performance and variation between years is important for the sheep industry, individual farmers are more concerned about performance of their own flocks.
Figure shows the range in lambing performances that exist between farms in this State in 1983-84. The seriously poor performance of many flocks is apparentm - 28 percent of farms had less than 60 per cent lambing. By contrast, 24 farms had performances better than 100 per cent. The reasons for the large differences between farms ( and …
Feed For Autumn Lambing Ewes, B R. Beetson
Feed For Autumn Lambing Ewes, B R. Beetson
Journal of the Department of Agriculture, Western Australia, Series 4
Department of Agriculture feeding trials with grazing sheep have consistently shown that the level of supplementation should be set for survival and little more, because beyond that the additional costs of supplementary feeding usually outstrip the benefits from extra production.
Even sheep in the greatest need - autumn lambing ewes in late pregnancy and the early part of lactation before and during the break of season - can be fed less than was thought necessary to achieve acceptable production.
Preventing Lupinosis With Phomopsis-Resistant Lupins, Jeremy G. Allen, W. A. Cowling
Preventing Lupinosis With Phomopsis-Resistant Lupins, Jeremy G. Allen, W. A. Cowling
Journal of the Department of Agriculture, Western Australia, Series 4
Lupinosis is one of the major livestock siseases in Western Australia. It is caused by stock eating toxins produced by the fungus Phomopsis leptostromiformis which colonises the stems of dead lupin plants.
In 975, the Department of Agriculture started a breeding programme to develop Phompsis-resistant lupins to overcome or control lupinosis. In the previous issue of this Journal the results of small plot evaluations of new lines of Phompsis-resistant lupins developed in this programme were reported. This article describes the first trial involving grazing of Phompsis-resistant lupins.
Phomopsis-Resistanct Lupins : Breakthrough Towards The Control Of Lupinosis, W A. Cowling, J. G. Allen, P Mcr. Wood, J. Hamblin
Phomopsis-Resistanct Lupins : Breakthrough Towards The Control Of Lupinosis, W A. Cowling, J. G. Allen, P Mcr. Wood, J. Hamblin
Journal of the Department of Agriculture, Western Australia, Series 4
Attemots to control lupinosis in sheep have been thwarted by the unpredictable occurence of the disease in the field. The complex interaction of the toxin-producing fungus (Phomopsis leptostromiformis) with its host (the lupin plant), together with variable weather and paddock grazing conditions, have made it difficult to predict when stock are in danger of contracting the disease. The risk of lupinosis discourages many farmers from growing lupins, despite the many potential benefits of including them in crop rotations.
A team of Department of Agriculture plant breeders, plant pathologists, and animal scientists set out in the mid 1970s to find resistance …
Survey Of Post-Weaning Management, Growth And Mortality Of Merino Weaners, Richard Thomas Norris
Survey Of Post-Weaning Management, Growth And Mortality Of Merino Weaners, Richard Thomas Norris
Technical Bulletins
Flock owner's excessive use of supplementary feed, especially of hay, lack of knowledge of nutritional requirements of weaners and failure to follow recommended methods of internal parasite control were the main areas of inefficient management. Management of the weaners as observed in the first year, suggested that previous advice by the Department of Agriculture was not well accepted or had not reached some producers.
Annual Ryegrass Toxicity Research Update, A G P Brown, P. Vogal
Annual Ryegrass Toxicity Research Update, A G P Brown, P. Vogal
Journal of the Department of Agriculture, Western Australia, Series 4
Annual ryegrass toxicity (ARGT) is a complex disease that kills sheep and cattle grazing pastures which contain infected ryegrass. The disease results when a nematode (Anguina agrostis) and a batcerium (Corynebacterium sp.) invade annual ryegrass and cause the seed heads to become toxic as the grass dries off.
The bacterium produces a complex toxin of 18 glycolipid compounds or corynetoxins which have been found to be virtually identical to the antibiotic tunicamycin.
Control Strategies For Annual Ryegrass Toxicity, W J. Burdass
Control Strategies For Annual Ryegrass Toxicity, W J. Burdass
Journal of the Department of Agriculture, Western Australia, Series 4
In 982-83, annual ryegrass tocicity (ARGT) was estimated to have cost Western Australian sheep farmers between $7 and $8 million in total economic losses.
The disease can severely disrupt farming operations. Sheep must be checked daily and if affected moved to a 'safe' paddock. The availability of paddock feed is reduced, as is stock carrying capacity. Worry about the possibility of dramatic stock losses, and uncertainty about what decisions to make, are all stressful.
Stock losses from ARGT can be minimised by the use of selective herbicides to control ryegrass in pastures and crops. This breaks the disease cycle - …
Ovulation Rate Of Ewes : Role Of Energy And Protein, E Teleni, J. B. Rowe
Ovulation Rate Of Ewes : Role Of Energy And Protein, E Teleni, J. B. Rowe
Journal of the Department of Agriculture, Western Australia, Series 4
Western Australia's sheep farmers are familiar with the low ovulation rate of Merino ewes and how this limits the lambing performance of ewe flocks.
One way in which ovulation rate and therefore lambing percentage may be increased is to feed seed of sweet lupin (Lupinus augustifolius) to ewes at mating. However, Department of Agriculture research has found that these increases do not show up consistently, and that there is considerable variability between farms.
If improved nutrition is to be a useful way to increasing ovulation rate, the mechanism by which nutrition affects ovulation rate must first be understood. This article …
Phomopsis Infection Of Lupin Seed, D S. Petterson, P. Mcr. Wood
Phomopsis Infection Of Lupin Seed, D S. Petterson, P. Mcr. Wood
Journal of the Department of Agriculture, Western Australia, Series 4
Early reports of lupinosis in Western Australia implicated infected stems and leaves of the sandplain or W,A. blue lupin (Lupinus cosentinii) as the main source of toxicity.
After the introduction of low alkaloid varieties of L. augustifolius, lupinosis continued to oddur on stubbles but random testing of seeds showed only low levels of Phomopsis leptostromiformis infection.
However in 1976, scientists at the University of Western Australia who were evaluating the use of an all lupin seed ration for drought feeding sheep encounted lupinosis in one of their trials.Seven per cent of the seed used was found to be infected …
Protein Enrichment Of Cereal Grains For Livestock, Andrew C. Dunlop, C. L. Mcdonald
Protein Enrichment Of Cereal Grains For Livestock, Andrew C. Dunlop, C. L. Mcdonald
Journal of the Department of Agriculture, Western Australia, Series 4
Every year Western Australian farmers feed about 759,000 tonnes of cereal grain to livestock, mostly to sheep but also to dairy and beef cattle. These grains are fed as drought feeds, as supplements to augment poor quality or scarce paddock feed or in growth rations to attain higher levels of production. Many grains fed, however, have a low protien content and are therefore used inefficiently by animals.
Several methods of improving the low protien content of feed grains have been tested. They include the addition of lupin seed, spraying oats with urea and gassing oats with ammonia.
Supplementary Feeds For Sheep, J B. Rowe
Supplementary Feeds For Sheep, J B. Rowe
Journal of the Department of Agriculture, Western Australia, Series 4
No abstract provided.
More Lambs From Feed And Chemical Treatments, K P. Croker
More Lambs From Feed And Chemical Treatments, K P. Croker
Journal of the Department of Agriculture, Western Australia, Series 4
The ovulation rate, or the number of eggs shed per ovulating ewe, represents the upper limit of the capacity of a flock of ewes toproduce lambs. Several methods can be used to increase ovulation rates and lambing percentages of ewes, including selection for better breeding, feeding and the use of chemicals.
The potential for improving the reproductive performance of Western Australia's ewe flocks by the use of different approaches to breeding was discussed by L.G. Butler and R.P. Lewer in the Journal of Agriculture in 1983.
This article mainly discusses the research conducted by the Department of Agriculture's Sheep and …
Grazing And Management Of Saltland Shrubs, C V. Malcolm, J. E. Pol
Grazing And Management Of Saltland Shrubs, C V. Malcolm, J. E. Pol
Journal of the Department of Agriculture, Western Australia, Series 4
areas of bare saltland on farms need not be unproductive etesores. Many Western Australian farmers are now successfully growing salt-tolerant or halophytic shrubs such as bluebush (Maireana brevifolia), saltbushes (Atriplex spp.) and samphires (Halosarcia spp.) on these areas.
Department of agriculture trials and farmers' experience indicate that if saltland is planted with recommended shrubs, it can provide two months' valuable grazing for sheep during autumn and early winter, a time when paddock feed is scarce. Research by the Department has also identified a range of salt-tolerant shrubs suited to the various types of saltland.
Grazing trials to …
Wool Staple Strength, I G. Ralph
Wool Staple Strength, I G. Ralph
Journal of the Department of Agriculture, Western Australia, Series 4
The staple strength of western Australia's wool has come under scruitiny since additional wool measurements to those of yield, fibre diameter and vegetable matter began throughout the Australian 985-86 wool selling season.
In 1980, the Sale by Additional Measurement Trial conducted on the September-October wool sales at Fremantle showed a range in staple breaking forcesfrom 10 to 70 Newtons per kilotex, with an average breaking force of between 30 and 35 N/ktex, A third of the lots offered for sale had a staple breaking force of less than 26 N/ktex, a value which, according to the Australian Wool Testing Authority, …