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Department of Primary Industries and Regional Development, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
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Articles 1 - 13 of 13
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Degradation Of Remnant Vegetation, Richard George, Don Mcfarlane, Russell Speed
Degradation Of Remnant Vegetation, Richard George, Don Mcfarlane, Russell Speed
Journal of the Department of Agriculture, Western Australia, Series 4
Remnant vegetation, wetlands and riverine systems on both private and public land throughout south-western Australia are being rapidly degraded by dryland salinity, inundation, silting, nutrient enrichment and weed invasion. Richard George, Don McFarlane and Russel Speed outline some of the reasons why this is happening and provide some case studies that highlight actions to protect these remnants.
Cooperative Landcare Venture Revisited, Kate Mcinnes
Cooperative Landcare Venture Revisited, Kate Mcinnes
Journal of the Department of Agriculture, Western Australia, Series 4
Four years ago, the Journal of Agriculture reported on a unique partnership forged in 1989 between the Department of Agriculture Alcoa of Australia Limited and six catchment groups located in the Avon River catchment.
Kate McInnes reports on progress with the Avon Catchment Landcare Project.
How Sustainable Is Grazing Sheep On Annual Pastures In The Woolbelt?, Don Mcfarlane, Richard George
How Sustainable Is Grazing Sheep On Annual Pastures In The Woolbelt?, Don Mcfarlane, Richard George
Journal of the Department of Agriculture, Western Australia, Series 4
Low wool prices have reduced the profitability of producing wool from clover-based annual pastures in the south-western woo/belt. The heavy reliance on one commodity is economically unsustainable for many farmers. But we should also consider how ecologically sustainable the practice is.
Shallow-rooted annual pastures contribute to widespread salinity in the area, annual legumes are acidifying the soils and making them water repellent, and bare, detached soils from heavy grazing cause sheet and rill erosion during autumn storms. In addition, stock are degrading remnant vegetation and destroying the soil's structure.
To counteract this degradation, the woo/belt needs more perennial pastures and …
Land Degradation : Not Just As An Agricultural Problem, J R H Riches
Land Degradation : Not Just As An Agricultural Problem, J R H Riches
Journal of the Department of Agriculture, Western Australia, Series 4
No abstract provided.
Pastoral Land Degradation: The Fitzroy As A Case Study, Alan L. Payne, Ronald B. Hacker
Pastoral Land Degradation: The Fitzroy As A Case Study, Alan L. Payne, Ronald B. Hacker
Journal of the Department of Agriculture, Western Australia, Series 4
When large numbers of domestic livestock are superimposed on native vegetation in semi-arid and arid areas of the world, the ecological balance inevitably changes. In extreme cases these changes include such degradation as drastic losses of vegetation and active soil erosion. Areas affected in this way are unproductive for most purposes.
Western Australia's Fitzroy River valley has deteriorated in this way. Today, this once-productive grazing country is so degraded that it has become a matter of concern to Governments, the pastoral industry and others.
This article gives a brief history of land degradation in parts of the Fitzroy River valley, …
Land Conservation In Western Australia, G A. Robertson
Land Conservation In Western Australia, G A. Robertson
Journal of the Department of Agriculture, Western Australia, Series 4
No abstract provided.
The Costs Of Land Degradation, D J. Carder
The Costs Of Land Degradation, D J. Carder
Journal of the Department of Agriculture, Western Australia, Series 4
No abstract provided.
Erosion Risks With High Stocking Rates At Kojonup Trial, Department Of Agriculture, Western Australia
Erosion Risks With High Stocking Rates At Kojonup Trial, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
A pasture grazing trial at Kojonup dramatically illustrated the effects of Cyclone Alby. Severe erosion was evident on the heavily stocked plots while the more lightly stocked plots showed little damage.
Agriculture And Pollution In Western Australia. Part 2. Pollution Problems In W.A, C V. Malcolm
Agriculture And Pollution In Western Australia. Part 2. Pollution Problems In W.A, C V. Malcolm
Journal of the Department of Agriculture, Western Australia, Series 4
In Part I pollution was defined as a reduction in the usefulness of a resource and its significance in relation to resource fragility was discussed. Pollution problems in Western Australia are here considered in broad geographical regions with further subdivision into pollution types.
The Long Term Effects Of Frequent Cropping, Stanley Thomas Smith
The Long Term Effects Of Frequent Cropping, Stanley Thomas Smith
Journal of the Department of Agriculture, Western Australia, Series 4
AGRICULTURALLY speaking, few Western Australian soils are more than 50 years old. We have the responsibility of preserving them for farming—not for one man's lifetime, but for centuries.
The aim of this article is to demonstrate that cropping and cultural practices do have some effects on the soil, and that these effects should be considered when choosing a farm rotation.
The Ord River Regeneration Project. 2. Dealing With The Problem, K Fitzgerald
The Ord River Regeneration Project. 2. Dealing With The Problem, K Fitzgerald
Journal of the Department of Agriculture, Western Australia, Series 4
THE PROGRAMME of protective and remedial work being undertaken in the Ord River catchment area had as its major objective the re-establishment of perennial vegetation, as a means of controlling erosion and reducing the silt load of the rivers. It is now in its seventh year of operation.
The Ord River Regeneration Project. 3. Eight Years Of Progress, K Fitzgerald
The Ord River Regeneration Project. 3. Eight Years Of Progress, K Fitzgerald
Journal of the Department of Agriculture, Western Australia, Series 4
REGENERATION of degraded areas in regions of marginal rainfall is a slow process under the best of conditions, but on the Ord River Catchment, where much top-soil had been removed, the problem was unusually severe.
In many areas top-soil will have to be rebuilt before vegetation can be re-established.
This will be a long, slow process and regeneration will proceed through gradual plant succession from the "pioneer" annual species through to the permanent and more productive perennial species needed for a stable catchment area.
The Ord River Catchment Regeneration Project. 1. The Nature, Extent And Causes Of Erosion In The Ord River Catchment Area, K Fitzgerald
The Ord River Catchment Regeneration Project. 1. The Nature, Extent And Causes Of Erosion In The Ord River Catchment Area, K Fitzgerald
Journal of the Department of Agriculture, Western Australia, Series 4
OF the 17,800 square miles of Ord River catchment area, an estimated 1,450 square miles of country is subject to varying degrees of erosion.
This lies astride the Ord River and its major tributaries, the Elvire, Negri, Stirling, Panton, Turner, Nicholson and RB rivers.
The bulk of the eroded country lies in W.A. but part projects into the Northern Territory.