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Articles 1 - 20 of 20
Full-Text Articles in Life Sciences
Stubble Retention For Control Of Wind Erosion, Dan Carter, Paul Findlater, Steve Porritt
Stubble Retention For Control Of Wind Erosion, Dan Carter, Paul Findlater, Steve Porritt
Journal of the Department of Agriculture, Western Australia, Series 4
The surest way to control wind erosion in continuous cropping systems is to retain stubble. Over the past ten years, Western Australian research has focused on the amounts of stubble needed to prevent that erosion.
Are Foxes Serious Predators Of Stock?, Peter Mawson, John Long
Are Foxes Serious Predators Of Stock?, Peter Mawson, John Long
Journal of the Department of Agriculture, Western Australia, Series 4
Commercial farming of goats for mohair, cashmere and meat production is a rapidly developing industry in the south-west of Western Australia.
In this article, the authors discuss the results of two studies conducted by the Agriculture Protection Board in which the levels of predation of kids and lambs by foxes in commercial goat flocks, and an experimental multiple-birth genotype sheep flock in the southwest of Western Australia, were measured.
Stubble : Friend And Foe, Department Of Agriculture And Food, Western Australia
Stubble : Friend And Foe, Department Of Agriculture And Food, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
Several articles in this issue of the Journal of Agriculture discuss some of the important issues of stubble management. The articles are condensed from some of the papers presented at a stubble workshop at Geraldton in 1991.
Red Kangaroos Can Set Back Range Regeneration, Andrew Mclaughlin
Red Kangaroos Can Set Back Range Regeneration, Andrew Mclaughlin
Journal of the Department of Agriculture, Western Australia, Series 4
After years of severe drought, stocking rates in Western Australia s arid rangelands have been kept low since the 1970s to allow native pastures to regenerate. As well, extensive re-seeding programs have started and sheep and cattle grazing on these areas has been restricted or eliminated. However, pasture regeneration in the rangelands can only succeed when grazing by all animals - sheep, cattle, kangaroos, goo.ts, camels, brumbies and donkeys - is controlled Many more red kangaroos roam throughout Western Australia's pastoral areas today than 20 years ago. The installation of windmills and troughs to water domestic livestock has allowed kangaroo …
Three New Late-Midseason Subterranean Clovers Released For High Rainfall Pastures, Phil Nichols, Donald Nicholas
Three New Late-Midseason Subterranean Clovers Released For High Rainfall Pastures, Phil Nichols, Donald Nicholas
Journal of the Department of Agriculture, Western Australia, Series 4
Three new subterranean clovers - Denmark, Gou/bum and Leura - have been released in 1992 by the National Subterranean Clover Improvement Program. These subterranean clovers are black-seeded, have low oestrogen levels and improved disease resistance. Their release offers the potential for substantial improvements in pasture productivity in areas of southern Australia that have long growing seasons.
This article outlines some of the testing procedures and subsequent selection of these varieties and describes their characteristics and potential role in Western Australia.
Results Of Stubble Research In Western Australia, Michael Perry, Ron Jarvis, Mel Mason, David Tennant
Results Of Stubble Research In Western Australia, Michael Perry, Ron Jarvis, Mel Mason, David Tennant
Journal of the Department of Agriculture, Western Australia, Series 4
Few farmers would question the desirability of retaining stubbles, both for control of erosion by wind and water, and to return organic matter to the soil. While the present debate is focused on the short term management of stubbles, longer term effects also need to be considered.
The Department of Agriculture has several long-running trials intended to measure long term effects.
The Impact Of Red Kangaroos On The Rangelands, Grant Norbury, Dale Norbury
The Impact Of Red Kangaroos On The Rangelands, Grant Norbury, Dale Norbury
Journal of the Department of Agriculture, Western Australia, Series 4
Kangaroos and other native animals should be maintained across their natural range, including areas set aside for pastoral use. But the added grazing pressure on native vegetation from sheep, cattle and feral animals, together with unnaturally high numbers of kangaroos, has seriously degraded much of our rangelands. Cattle and sheep numbers are relatively easy to control. The same cannot be said for kangaroos. Access to widespread man-made watering points has allowed kangaroos to continue breeding when normally a shortage of water would suppress reproduction.
Pastoralists complain that commercial kangaroo shooting is not always effective in preventing damage caused by kangaroos. …
The Sheep Lice Detection Test, Peter Morcombe
The Sheep Lice Detection Test, Peter Morcombe
Journal of the Department of Agriculture, Western Australia, Series 4
Sheep farmers would agree it is difficult to find sheep lice when carrying out an inspection.
The lice detection test makes this task easier and helps farmers decide how to control lice. The test also helps community liaison groups with eradication of lice infestations in specific areas, and provides data for epidemiologists to monitor changes in prevalence of lice and efficacy of treatments. Tests are much cheaper than flock inspection on the farm.
The present lice detection test was developed by the Australian Wool Testing Authority (A WTA) and introduced as an integral part of the Western Australian Sheep Lice …
Changes In The Western Australian Dairy Farm Industry, Ross Kingwell, Graham Annan
Changes In The Western Australian Dairy Farm Industry, Ross Kingwell, Graham Annan
Journal of the Department of Agriculture, Western Australia, Series 4
Over the past decade, the number of dairy cows and the number of producers in the Western Australian dairy industry have steadily declined. The industry still relies heavily on market milk quotas for its profits, but recent export contracts have boosted profits from manufacturing milk production.
Market milk quotas remain unevenly distributed across the dairy regions and amongst quotaholders, although the regional distribution of quotas is changing.
Opportunity Knocks : Sowing Wheat Early In The North-Eastern Wheatbelt, Nicole Kerr, Doug Abrecht
Opportunity Knocks : Sowing Wheat Early In The North-Eastern Wheatbelt, Nicole Kerr, Doug Abrecht
Journal of the Department of Agriculture, Western Australia, Series 4
Farmers consider many factors in deciding whether to start sowing wheat, but the most important are the amount of rain and time of year. In this study we assessed the chances of farmers in the north-eastern wheatbelt (less than 325 mm rainfall) receiving enough rain to sow wheat early. In low rainfall areas such as this, where an early finish to the season is likely, it is especially important that farmers take advantage of all early sowing opportunities. The potential benefits of sowing wheat early generally outweigh the associated risks, particularly in lower rainfall areas. However, early sowing depends on …
Wider Spaced Rows For Lupins, Ron Jarvis
Wider Spaced Rows For Lupins, Ron Jarvis
Journal of the Department of Agriculture, Western Australia, Series 4
In this farm scale trial at Wongan Hills, a lined combine was used to seed lupins into rows spaced 380 mm apart in wheat stubble.
Test Detects Resistant Green Peach Aphids In Lupins, Francoise Berlandier, Ian Dadour
Test Detects Resistant Green Peach Aphids In Lupins, Francoise Berlandier, Ian Dadour
Journal of the Department of Agriculture, Western Australia, Series 4
Confirmation of insecticide resistance in green peach aphid in Western Australia's lupin crops means farmers will have to choose insecticides much more carefully to control this pest. Resistance within an aphid population varies, and when resistant aphids are no longer exposed to insecticides, they may revert back to being susceptible in as little as one generation. Furthermore, when these revertant populations are exposed to the same insecticides in the future, resistance quickly reoccurs. In this article, the authors discuss a test to determine the extent of insecticide resistance in green peach aphid and how to manage it.
New Yellow Serradella Varieties For Low Rainfall Pastures, Clinton Revell
New Yellow Serradella Varieties For Low Rainfall Pastures, Clinton Revell
Journal of the Department of Agriculture, Western Australia, Series 4
Large areas of acidic, sandy soils in Western Australia's low and medium rainfall, wheatsheep areas are suited to the pasture legume, yellow serradella.
In the past, a lack of varieties with suitable maturity has limited the use of this species.
New varieties developed in Western Australia and significantly earlier in maturity than traditional types can now extend the use of yellow serradella into these regions.
The Role Of Earthworms In Western Australian Agriculture, Tom Mccredie, Lex Parker
The Role Of Earthworms In Western Australian Agriculture, Tom Mccredie, Lex Parker
Journal of the Department of Agriculture, Western Australia, Series 4
Earthworms have a reputation as soil builders and renovators, particularly among 'organic' farmers and gardeners. They improve soil fertility through increased aeration, aggregation, water infiltration and release of nutrients from organic matter. However, the benefits of earthworms in the wheatbelt have been doubted for many years because of their poor survival in cultivated soils.
Since cropping began in the Western Auslmlian whealbelt over 1OO years ago, the physical condition of many soils has deteriorated. The primary causes of soil degradation were the European cultivation practices used by farmers and the trampling effect of introduced animals. in particular, sheep.
Rural Depopulation In Western Australia, Ross Kingwell
Rural Depopulation In Western Australia, Ross Kingwell
Journal of the Department of Agriculture, Western Australia, Series 4
Western Australia's population has recently drifted from inland rural areas to cities and coastal regions. Changes in fanning practices over several decades and the recent falls in wheat and wool prices, have forced many families to leave inland farms and rural towns .
However, many families are also developing sources of off-farm income and other activities to keep themselves, local businesses and towns suroiving.
What Do Foxes Do At Night?, Peter Mawson, John Long
What Do Foxes Do At Night?, Peter Mawson, John Long
Journal of the Department of Agriculture, Western Australia, Series 4
Foxes are often labelled as ruthless killers of lambs, kid goats and poultry. However, studies of the incidence of predation on lambs and kids have shown that foxes generally kill less than 3 per cent of lambs and 3 to 5 per cent of kids,
Are foxes, therefore, killers of lambs and kid goats, or just timid scavengers?
This article provides an insight into the behaviour of foxes in lambing and kidding paddocks at the Department of Agriculture's Avondale Research Station, Beverley, and near Moora, during 1987 and 1988.
Clearwing Moths Are Key To Dock Control, Kingsley Fisher
Clearwing Moths Are Key To Dock Control, Kingsley Fisher
Journal of the Department of Agriculture, Western Australia, Series 4
Two clearwing moths imported from Morocco and France could be the key to controlling dock (Rumex pulcher) - one of the worst weeds of high rainfall pastures in southern Australia
Taking The Emu To Market, Paul Frapple, Ruth Hagan
Taking The Emu To Market, Paul Frapple, Ruth Hagan
Journal of the Department of Agriculture, Western Australia, Series 4
Licensed, commercial emu farming in Western Australia is now five years old.
This year, 13,500 birds will be processed for their meat, skin and oil. Production has exceeded demand at prices which the industry considers fair because the industry is still developing marketd for these producys.
Without secure, long term markets, over-production will worsen as the turn-off in this State increases and emus become available from other Australian states and overseas.
The Department of Agriculture is assisting the industry to develop a viable industry.
Understanding The Importance Of Eperythrozoon Ovis Infection In Sheep, Marc Kabay
Understanding The Importance Of Eperythrozoon Ovis Infection In Sheep, Marc Kabay
Journal of the Department of Agriculture, Western Australia, Series 4
Assigning priorities for research on sheep diseases relies in part on understanding the prevalence and economic impact of each disease.
Eperythrozoon ovis infection in sheep, for example is a common, but not costly, disease.
Breeding Better Malting Barleys, Ross Gilmour, Allen Tarr, Stefan Harasymow
Breeding Better Malting Barleys, Ross Gilmour, Allen Tarr, Stefan Harasymow
Journal of the Department of Agriculture, Western Australia, Series 4
Development of new barley cultivars in Western Australia has substantially improved the grain yield and quality of the State's barley crop. This has increased returns to barley growers and enhanced Western Australia's reputation in export markets as a major supplier of barley for malting and feed.
The State exports more than 200, 000 t of malting barley, 60, 000 t of barley malt and 150, 000 t of feed barley each year.
The major challenge for the future is to develop new, high yielding cultivars with improved malting quality.
In this article, the authors discuss the achievements of the past; …