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Articles 691 - 720 of 1581

Full-Text Articles in Physical Sciences and Mathematics

An Introduction To The Soils Of The Jerramungup Advisory District, T C. Stoneman, National Soil Conservation Program (Australia) Jan 1990

An Introduction To The Soils Of The Jerramungup Advisory District, T C. Stoneman, National Soil Conservation Program (Australia)

Bulletins 4000 -

With descriptions, illustrations and notes on eight common soils.


Economics Of Interceptor Drains : A Case Study, Andrew Bathgate, Ian Evans Jan 1990

Economics Of Interceptor Drains : A Case Study, Andrew Bathgate, Ian Evans

Journal of the Department of Agriculture, Western Australia, Series 4

This case study determines the most likely rate of return to capital invested in constructing seepage interceptor drains to reduce the effect of waterlogging on crop and pasture yields. The analysis of a farm in the Denbarker region, west of Albany, determined what increases were needed in pasture growth to justify the cost of constructing drains across four adjacent paddocks. The benefits of changing rotations to include lupins were also determined, as growing lupins was unprofitable before the construction of drains.


The Extent And Cost Of Waterlogging, Don Mcfarlane, Buddy Wheaton Jan 1990

The Extent And Cost Of Waterlogging, Don Mcfarlane, Buddy Wheaton

Journal of the Department of Agriculture, Western Australia, Series 4

Waterlogging is an underrated and not widely recognized problem in our cropping areas. Before we can tackle the problem through drainage and alternative cropping systems, we need to know its extent and how much crop yield is lost. The effect of waterlogging on pasture growth is also poorly known.


Waterlogging Limits Growth On Duplex Soils, Bob Belford, Miles Dracup, David Tennant Jan 1990

Waterlogging Limits Growth On Duplex Soils, Bob Belford, Miles Dracup, David Tennant

Journal of the Department of Agriculture, Western Australia, Series 4

Duplex soils - soils with a sandy topsoil overlying a clayey subsoil -are ividespread in Western Australia's agricultural areas (see map). These soils are potentially highly productive, but crop growth is variable and the soils can become waterlogged. Work on a duplex soil site near Beverley has shoivn that the soil ivaterlogs where the permeability of the clay is low, and that this permeability varies ividely over the site. Waterlogging accounts for an average of half of the variation in wheat yields on this site; surprisingly, lupins have so far appeared less sensitive to waterlogging- The Department of Agriculture and …


Yield Potential Of Barley., J H. Moore, G R. Dean Jan 1990

Yield Potential Of Barley., J H. Moore, G R. Dean

Experimental Summaries - Plant Research

Barley yield potential demonstration, 89A130. Barley yield potential, 89A131. Logan herbicide mixtures, 89AL28. Logran herbicide mixtures for wheat and barley, 89AL29. Darnel control in cereals, 89AL38. Fumitory control in peas, 89AL37. Freezer pea herbicides, 89AL36. Post emergence weed control in processing peas, 89MC16. Post emergence weed control in processing peas, 89MC17. Diuron + 2, 4-DB effect on Zodiac Medic, 89AL41. Bladex, Diuron, 2, 4, DB and pursuit on doublegee in pasture. Diuron + 2, 4-DB for sheep thistle control in pasture. Bracken controlwith brush off, 89AL40.


Soils Of The Ivanhoe Plain, East Kimberley, Western Australia, J M. Aldrick, M H R Van Cuylenburg, P W. Moody, B A. Wren, A J. Clarke Jan 1990

Soils Of The Ivanhoe Plain, East Kimberley, Western Australia, J M. Aldrick, M H R Van Cuylenburg, P W. Moody, B A. Wren, A J. Clarke

Technical Bulletins

The Ivanhoe Plain was divided into two geomorphic provinces. The principal difference between the provinces is the time during which pedogenesis occurred. The crcking clay soils of the northern province are generally more highly leached than their younger counterparts in the southern province. Sixteen land units are identified as distinct from soil units. These units give cognizance to vegetation and topographical features as well as soils.


Stunt Patch Disorder Of Lupins., Miles Dracup Jan 1990

Stunt Patch Disorder Of Lupins., Miles Dracup

Experimental Summaries - Plant Research

Trial 89ME1 and 90ME5

Stunt patch disorder of lupins.

Location: Merredin.

Studies on the disorder have been initiated (89ME1 and 90ME5) on two sites 15 km south of Merredin. This report will summarize data on:

1) The soil;

2) Soil strength and lupin emergence on 90ME5; and

3) Soil chemical and physical characteristics associated with the patches on 89ME1 (investigations by A. Thomson for B Sc (Agric) dissertation).

Trial 90PE56

Understanding the importance of moisture and temperature in the seedbed on establishment of lupin.

However, despite their importance in determining the success of establishment, there have been few attempts to …


Understanding Crop Growth On Duplex Soils., R. Belford, Miles Dracup, D. Tennant Jan 1990

Understanding Crop Growth On Duplex Soils., R. Belford, Miles Dracup, D. Tennant

Experimental Summaries - Plant Research

Trial 88EB18

Location: East Beverley Research Station

Impeded early root growth.

Using aerial photography and crop growth data from previous seasons we identified areas on the site where crops grow well or poorly. One of the factors implicated in the poor growth areas is impeded early root growth (see Belford et al. and Tennant et at., 1990 Experimental Summaries, this section). Here we describe the problem and outline possible causes.

Trial 88EB18

Growth and yield of wheat and lupin crops at East Beverley.

Location: East Beverley Research Station.

To measure the growth and yield of wheat and lupin crops in …


Preliminary Groundwater And Salinity Investigation In The Eastern Wheatbelt. 4. Kitto's Hillslope, Tammin - 1985-90, Richard J. George Dr Jan 1990

Preliminary Groundwater And Salinity Investigation In The Eastern Wheatbelt. 4. Kitto's Hillslope, Tammin - 1985-90, Richard J. George Dr

Resource management technical reports

The investigation revealed that a deep, brackish to saline groundwater system and dolerite dyke, contained within the saprolite were responsible for the secondary salinity; the annual discharge of water and salt at the seep from the damp groundwater system was about 2800 kL and 17 tonnes respectively; and the water-tables were not rising and that the most appropriate management of the site was to plant salt tolerant forage plants in combination with trees.


Response By Stylosanthes Hamata And S. Scabra To Phosphate On Three Soils In The North-Kimberley Of Western Australia, A Mcr Holm, Mario F. D'Antuono Jan 1990

Response By Stylosanthes Hamata And S. Scabra To Phosphate On Three Soils In The North-Kimberley Of Western Australia, A Mcr Holm, Mario F. D'Antuono

Resource management technical reports

Legume herbage mass was maximized after two or three years application of 50 kg/ha double superphosphate for both Verano and Fitzroy on Red earth soils and for Fitzroy on Yellow lateritic soils. There was increased production of Verano up to the maximum fertilizer level. Both varieties responded in the second year to residual P following application in the first year but there were no responses in subsequent years.


Preliminary Groundwater And Salinity Investigation In The Eastern Wheatbelt. 1. Brennand's Catchment, Richard J. George Dr, P W C Frantom Jan 1990

Preliminary Groundwater And Salinity Investigation In The Eastern Wheatbelt. 1. Brennand's Catchment, Richard J. George Dr, P W C Frantom

Resource management technical reports

Groundwaters were found to be 10 m below the floor of the ancestral playa lake in Brennand's catchment. They were extremely saline. A groundwater flow system was not established on much of the catchment. Flow was observed to be occurring from recharge areas near the playa lakes towards the midslopes of the catchment. Flow was apparently restricted from leaving Brennand's catchment because of obstruction to groundwaters created by dolerite dykes.


Salinity And Waterlogging On The Esperance Downs Research Station, D J. Mcfarlane, A T. Ryder Jan 1990

Salinity And Waterlogging On The Esperance Downs Research Station, D J. Mcfarlane, A T. Ryder

Resource management technical reports

Details the situation on the station so that the demonstration and research programs can be designed and the effect of the treatments assessed. Past work on the station has been briefly summarised and the results of geophysical surveys and additional drilling are given. Surveys of electromagnetic terrain conductivities have shown where salinity is most serious at present. The most deeply penetrating method may have identified areas likely to developing salinity in future.


Jerdacuttup Land Resource And Capability Study, Geoff Allan Moore, S T. Gee, D Vincent Jan 1990

Jerdacuttup Land Resource And Capability Study, Geoff Allan Moore, S T. Gee, D Vincent

Resource management technical reports

The Jerdacuttup catchment on the south coast of Western Australia has a number of significant land degradation problems. A soil-landform map of the catchment was produced at a scale of 1:50,000. The map units are a combination of landform and soil type. A land capability assessment was undertaken for five land uses; improved annual pastures, perennial pastures, lucerne, cereal cropping and lupins, using a five class classification.


Busselton - Margaret River - Augusta Land Capability Study : Methodology And Results, Peter J. Tille, Neil Clifton Lantzke Jan 1990

Busselton - Margaret River - Augusta Land Capability Study : Methodology And Results, Peter J. Tille, Neil Clifton Lantzke

Resource management technical reports

A land unit map of the region has been prepared at a scale of 1:50,000. Additional maps of climate, surface and groundwater supplies and existing land use have also been prepared at smaller scales. The capability of each of the land units to support grazing, market gardens, vineyards, orchards and forestry has been assessed. The limitations for housing on small rural lots have also been evaluated. Describes the methods by which the survey was undertakenand will be primary of use to the technical user.


Pumps : A Method Of Financially Assessing Groundwater Pumping Used To Mitigate Salinity In South-Western Australia, Richard J. George Dr Jan 1990

Pumps : A Method Of Financially Assessing Groundwater Pumping Used To Mitigate Salinity In South-Western Australia, Richard J. George Dr

Resource management technical reports

No abstract provided.


Geraldton Rural-Residential Land Capability Study, R A. Dye, A M E Van Vreeswyk, Geoff Allan Moore Jan 1990

Geraldton Rural-Residential Land Capability Study, R A. Dye, A M E Van Vreeswyk, Geoff Allan Moore

Land resources series

With a growing population in the Geraldton area, there is a demand for rural and coastal subdivision to provide for rural residential development and intensification of agricultural activities. Future land use planning for land use change and management of land to overcome existing land degradation problems should be based on land capability. This study provides a semi-detailed (1:50,000) soil and landform inventory for the immediate zone around Geraldton, south from Coronation Beach to Cape Burney along the coast, 13.7 km inland in the north and 7.6 km inland in the south. Eight land systems were identified in the land resource …


Floristic Survey Of Remnant Vegetation In The Dandaragan Area, Western Australia, Edward Arnold Griffin Jan 1990

Floristic Survey Of Remnant Vegetation In The Dandaragan Area, Western Australia, Edward Arnold Griffin

Resource management technical reports

A study involving the documentation of the extent and floristic composition of patches of native vegetation left uncleared by agricultural development is described. Floristic regions were defined in the study area by detailed analysis of the floristic data. The concentration of the major conservation reserves in only a few of these regions left the floristic variation of most of these regions poorly represented conservation reserves. About 13 percent of the private property remains uncleared.


An Introduction To The Soils Of The Esperance Advisory District, T C. Stoneman, Tim D. Overheu, P G. Muller, National Soil Conservation Program (Australia) Jan 1990

An Introduction To The Soils Of The Esperance Advisory District, T C. Stoneman, Tim D. Overheu, P G. Muller, National Soil Conservation Program (Australia)

Bulletins 4000 -

With descriptions, illustrations and notes on seven common soils.


Spacing Water Points In The Southern Pastoral Areas Of Western Australia, Don Burnside, Adrian Williams, Peter Curry Jan 1990

Spacing Water Points In The Southern Pastoral Areas Of Western Australia, Don Burnside, Adrian Williams, Peter Curry

Bulletins 4000 -

An inadequate distribution of watering points in our pastoral lands, particularly in the saltbush/bluebush pasture, has caused localisized land degradation close to waters and reduced animal productivity (particularly in stressful times). From experimentation and observation, some generalised recommendations for water supply distribution in pastoral areas can be made.


An Introduction To The Soils Of The Albany Advisory District, T C. Stoneman, National Soil Conservation Program (Australia) Jan 1990

An Introduction To The Soils Of The Albany Advisory District, T C. Stoneman, National Soil Conservation Program (Australia)

Bulletins 4000 -

With description, illustrations and notes on eight common soils.


An Introduction To The Soils Of The Geraldton Advisory District, T C. Stoneman, National Soil Conservation Program (Australia) Jan 1990

An Introduction To The Soils Of The Geraldton Advisory District, T C. Stoneman, National Soil Conservation Program (Australia)

Bulletins 4000 -

With descriptions, illustrations and notes on eight common soils.


Integrated Control Of Soil Insect Pests Of Potatoes, Stewart Learmonth, John Matthiesson Jan 1990

Integrated Control Of Soil Insect Pests Of Potatoes, Stewart Learmonth, John Matthiesson

Journal of the Department of Agriculture, Western Australia, Series 4

One of the more difficult aspects of growing potatoes in Western Australia is controlling soil insect pests. These pests have become more troublesome because the highly effective and persistent organochlorine insecticides previously used to control the main soil pests, African black beetle and whitefringed weevil, were deregistered for agricultural use in 1987. Entomologists from the Department of Agriculture and CSIRO in Western Australia are collaborating to develop new management strategies for these pests that rely less on the use of chemical insecticides


Waterlogging : One Reason Why Our Crops And Pastures Are Not Achieving Maximum Yields, Department Of Agriculture And Food, Western Australia Jan 1990

Waterlogging : One Reason Why Our Crops And Pastures Are Not Achieving Maximum Yields, Department Of Agriculture And Food, Western Australia

Journal of the Department of Agriculture, Western Australia, Series 4

Water, either its lack"or excess, is the main factor affecting the yield of crops and pastures in Western Australia.


The 1989 Saltland Survey, Richard George Jan 1990

The 1989 Saltland Survey, Richard George

Journal of the Department of Agriculture, Western Australia, Series 4

In March 1989, the Australian Bureau of Statistics (ABS) surveyed farmers in Western Australia to determine the area of previously arable land that was now too saline for conventional agriculture. Farmers reported that 443,441 ha, or 2.83 per cent, of the 15.7 million hectares of cleared farm land in south-western Australia, was saline. This was an increase of about 180,000 ha on the 1979 survey figure.

The worst affected areas were in the 350 mm to 600 mm rainfall zone and included the Shires of Tammin (9.26 per cent arable area saline), Katanning (7.96 per cent), Goomalling (7.93 per cent), …


An Introduction To The Soils Of The Three Springs Advisory District, T C. Stoneman, National Soil Conservation Program (Australia) Jan 1990

An Introduction To The Soils Of The Three Springs Advisory District, T C. Stoneman, National Soil Conservation Program (Australia)

Bulletins 4000 -

With descriptions, illustrations and notes on seven common soils.


An Introduction To The Soils Of The Moora Advisory District, T C. Stoneman, National Soil Conservation Program (Australia) Jan 1990

An Introduction To The Soils Of The Moora Advisory District, T C. Stoneman, National Soil Conservation Program (Australia)

Bulletins 4000 -

With descriptions, illustrations and notes on eight common soils.


An Introduction To The Soils Of The Lake Grace Advisory District, T C. Stoneman, National Soil Conservation Program (Australia) Jan 1990

An Introduction To The Soils Of The Lake Grace Advisory District, T C. Stoneman, National Soil Conservation Program (Australia)

Bulletins 4000 -

With descriptions, illustrations and notes on eight common soils.


North Mullewa Research Station "Daisy Downs" Field Day, Peter Nelson Aug 1989

North Mullewa Research Station "Daisy Downs" Field Day, Peter Nelson

All other publications

NMRS (165 ha) was leased from "Daisy Downs" (Manager Mr Ken Thompson) in 1985. NMRS was established in response to famer and local goverment demand for more research on the shallow, heavy soils in a low rainfall area. It is run along similar lines to the East Chapman Research Station (ECRS), with large rotation paddocks (42 ha) set up to study farming systems the remainder of the leased area being used for general experimental purposes.


Forage Shrubs And Grasses For Revegetating Saltland, H V. Runciman, C V. Malcolm Aug 1989

Forage Shrubs And Grasses For Revegetating Saltland, H V. Runciman, C V. Malcolm

Bulletins 4000 -

Salt tolerant shrubs and grasses are used for forage production from salt-affected farmland. This Bulletin is designed to assist in recognition of the important species in Western Australia and to provide information on their use. The species listed have more forage value than some natural indicators and colonizers of saltland, such as Mediterranean barley grass (Hordeum geniculatum), ice plant (Mesembryanthemum spp.), mallee lovegrass (Eragrostisdielsii), salt spurry (Spergularia spp.), curly ryegrass (Parapholis incurva) and beard grass (Polypogon monspeliensis). Some of the plants are also useful for rehabilitating degraded rangeland and mine …


Interaction Of Rhizoctonia Root Rot On Wheat With Post Emergence Herbicides, W Macleod Jan 1989

Interaction Of Rhizoctonia Root Rot On Wheat With Post Emergence Herbicides, W Macleod

Experimental Summaries - Plant Research

Interaction of Rhizoctonia root rot on wheat with post emergence herbicides, 88E30. Location, aim, treatment, method, results, table1. Take-all inoculum levels in a ryegrass sward after treatment with hoegrass. 88MD30. Location, aim, treatment, method, results, Interaction of Pleiochaeta root rot on lupins with Simazine®, 88ME64, 88WH335, 88ME64. Location, aim, treatment, method, results, tables 1 to 8.