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Articles 91 - 107 of 107
Full-Text Articles in Physical Sciences and Mathematics
Economics Of Interceptor Drains : A Case Study, Andrew Bathgate, Ian Evans
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.
Integrated Control Of Soil Insect Pests Of Potatoes, Stewart Learmonth, John Matthiesson
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
Pumps : A Method Of Financially Assessing Groundwater Pumping Used To Mitigate Salinity In South-Western Australia, Richard J. George Dr
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.
Floristic Survey Of Remnant Vegetation In The Dandaragan Area, Western Australia, Edward Arnold Griffin
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.
Busselton, Margaret River, Augusta: Land Capability Study, Peter J. Tille, Neil Clifton Lantzke
Busselton, Margaret River, Augusta: Land Capability Study, Peter J. Tille, Neil Clifton Lantzke
Land resources series
The study was done to ensure that information on the area's land resource, and its capability, is available for land use planning. This information will assist planners to make decisions which can allow for the optimal development of the land while avoiding land degradation or land use conflicts. A map showing the distribution of land units defined according to soil type, topography, drainage and wind exposure was prepared at a scale of 1:50,000. From this map a smaller scale, less detailed land systems map was drawn. Land capability, the ability of land to sustain a specific use without undesirable on-site …
Investigating Poor Pasture Productivity., J. W. Bowden, R. J. Lunt, C. Broun
Investigating Poor Pasture Productivity., J. W. Bowden, R. J. Lunt, C. Broun
Experimental Summaries - Plant Research
Trial 90N06
Location: West Dale
To determine the reason for poor pasture productivity in medium rainfall zone. Specifically why the pastures are dominated by the poorly productive species Trifolium suffocatum and why there was a large response to phosphorous fertilizer at 50 ppm P in the soil.
Wheat Responses To Levels, Sources And Times Of Application Of Nitrogen., J. W. Bowden, S. J. Burgess, R. J. Lunt, Ian Fillery
Wheat Responses To Levels, Sources And Times Of Application Of Nitrogen., J. W. Bowden, S. J. Burgess, R. J. Lunt, Ian Fillery
Experimental Summaries - Plant Research
Trial 90M055
Associated work: 90NO112, 105,104.111, 90MO53, 54,56
Location: Dandaragan
This project characterizes the dynamics of nitrogen supply to a wheat crop at each of the sites on which various methods of making fertilizer recommendation were tested. It supposedly provides the "optimum" nitrogen fertilizer regime as well as detailed information on nitrogen supply and demand so that results can be made transferable to other situations.
Trial 90MO56
Related trials: 90NO104, 105, 111, 112; 90MO53, 54,55
Tactical nitrogen application for wheat
Location: Danaragan
This project compares tactical and strategic methods for determining nitrogen requirements of wheat. The tactical methods depend on …
Murex Medic Field Evaluation., D. J. Gillespie, D. R. Mcclements, D. S. Francis
Murex Medic Field Evaluation., D. J. Gillespie, D. R. Mcclements, D. S. Francis
Experimental Summaries - Plant Research
Trials: 90GE113, 90MO62, 90WH87, 90ME72, 90NO115, 90A24, 90AB17, 90AL35
Locations: Geraldton, New Norcia, Wongan Hills, Merredin, Southern Brook, Avondale, Katanning, Tenderden.
The selection SEP29.1 was outstanding for both dry matter production and seed yield over a wide range of sites varying in both rainfall and soil type. On the basis of these trials, six lines have been selected for further evaluation in 1991.
They are: SEP29.1 SEP26.2.7 GRC69 GRC87.1 87F01.28 87FB2.36
Trials 90A25 and 90NO116
Redlegged earthmite field experiments.
Very low levels of redlegged earthmite and only minor damage to test varieties was recorded in this trial. Damage ratings were …
Deep Banding Phosphate For Lupins. 1990 Results., R. J. Jarvis
Deep Banding Phosphate For Lupins. 1990 Results., R. J. Jarvis
Experimental Summaries - Plant Research
Trials 90SC1, 90SC21, 90SC12, 88SC28, 90WH73
There is no doubt that deep banding is the only effective way to provide an efficient supply of phosphorus for lupins in the eastern wheatbelt.
Location: Carrabin, Wongan Hills.
Organochlorine Residues In Soil And Plant., Tony Albertsen
Organochlorine Residues In Soil And Plant., Tony Albertsen
Experimental Summaries - Plant Research
Trial 5812
To determine the relationship between soil and plant Dieldrin contamination in vegetables.
Location: Bunbury Regional Office (experimental site)
National Subterranean Clover Improvement Programme., P. G. H. Nichols
National Subterranean Clover Improvement Programme., P. G. H. Nichols
Experimental Summaries - Plant Research
The National Subterranean Clover Improvement Programme (NSCIP) aims to develop, by breeding and selection, better adapted and more productive low—oestrogen cultivars of subterranean clover for a range of environments in southern Australia. The programme is a collaborative one with the University of Western Australia and consists of two phases: (i) early generation selection, which involves selecting varieties satisfying primary selection criteria; and (ii) field evaluation of advanced lines, which is conducted by the Departments of Agriculture in each State and co—ordinated by the Plant Breeder.
The first phase is conducted at the University Field Station (UFS) and is continued until …
Potassium Nutrition Of Pastures On The Sandplain Soils Of Western Australia., N. K. Edwards
Potassium Nutrition Of Pastures On The Sandplain Soils Of Western Australia., N. K. Edwards
Experimental Summaries - Plant Research
Aims: Determine the factors affecting the fate of native and applied potassium on sandplain soils.
Define current and residual response curve parameters for potassium applications.
Develop recommendations for the economic management of soil potassium levels.
Trial 88BA46
Maintenance application rates of potassium on sandplain soils.
Location: Badgingarra Research Station.
Fertilizer: Pastures and L. cosentinii - 200 kg/ha Super topdressed, wheat - 100 kg/ha Super topdressed, 120 kg/ha Agras No 1 drilled, lupins - 240 kg/ha Super Mn drilled. Urea topdressed on wheat on 26 June, 100 kg/ha.
Trial 88TS69
Maintenance application rates of potassium on sandplain soils
Location: North Eneabba. …
Systems For Early Sowing Of Wheat In Low Rainfall Zones., Nicole Kerr, Glenn Adam
Systems For Early Sowing Of Wheat In Low Rainfall Zones., Nicole Kerr, Glenn Adam
Experimental Summaries - Plant Research
Aims:
(i) use available climatic data to determine when breaks are likely to occur, and assess the risk of crop failure from 'false breaks'.
(ii) determine optimum methods of early crop establishment on a number of soil types, particularly massive earth soils.
(iii) determine the yield advantages of early planting of cereals, and sowing date * variety interactions. (iv) increase adoption of early sowing technology throughout the north-eastern wheatbelt.
Trial 90GE7, 90GE8, 90NM1 and 90GE10
Time of sowing * variety trials.
Location: Balla, North Mullewa and Morawa.
All of the trials the following design: 3 sowing dates (mid May, late …
Rates Of Phosphorus And Potassium For Lupins On The South Coast,, M. Seymour
Rates Of Phosphorus And Potassium For Lupins On The South Coast,, M. Seymour
Experimental Summaries - Plant Research
Trial 90ES23
Phosphorus and potassium response of lupins in high rainfall areas.
Location: Neridup
To evaluate the response of lupins to Phosphorus and Potassium response of lupins in high rainfall areas.
Herbicide Resistance In Weeds., G. S. Gill
Herbicide Resistance In Weeds., G. S. Gill
Experimental Summaries - Plant Research
Trial 90WH76
Alternative herbicides for diclofop-methyl resistant annual ryegrass in wheat.
Location: Wongan Hills Research Station.
To investigate the performance of alternative herbicides for the control of diclofop-methyl resistant annual ryegrass in wheat.
Trial 90WH80
Alternative herbicides for diclofop-methyl resistant annual ryegrass in lupins.
Location: Wongan Hills Research Station.
To investigate the performance of alternative herbicides for the control of diclofop-methyl resistant annual ryegrass in lupins
Trial 90A15
Alternative herbicides for Diclofop-methyl resistant wild oats in wheat.
Location: Avondale Research Station.
To investigate the performance of alternative herbicides for the control of diclofop-methyl resistant wild oats in wheat.
Trial 90A17 …
Ecology And Control Of Grass Weeds In Cereal Pasture Rotations In The Great Southern Region., A. Wallace
Ecology And Control Of Grass Weeds In Cereal Pasture Rotations In The Great Southern Region., A. Wallace
Experimental Summaries - Plant Research
Silvergrass control.
Trial 90AB11
Location: Great Southern Agricultural Research Institute - Katanning.
The site was an established silvergrass dominant pasture on a light sandy soil.
Trial 90KA95
Location: Great Southern Agricultural Research Institute - Katanning
The site was an established silvergrass dominant pasture on a medium clay soil.
Trial 90KA96
Location: Great Southern Agricultural Research Institute - Katanning
The site was an established silvergrass dominant pasture on heavy (Moort type) clay soil.
Simazine was found to be very active against silvergrass on the light sandy site and all rates applied gave complete control. There were some late germinations which enabled …
Getting The Best Out Of Our Wheats., Brenda Shackley, L. Lambert
Getting The Best Out Of Our Wheats., Brenda Shackley, L. Lambert
Experimental Summaries - Plant Research
Trials: 90KA82 (TOS1), 90KA83 (TOS 2), 90KA84 (TOS 3)
90LG4 (TOS 1), 90LG45 (TOS 2), 90LG46 (TOS 3)
90LG47 (TOS 1), 90LG48 (TOS 2), 90LG49 (TOS 3)
90N42 (TOS 1), 90N43 (TOS 2), 90N44 (TOS 3)
Variety * time of sowing (TOS)
Locations: Wagin, Tarin Rock, Newdegate Research Station and Lake Varley.
Determine the optimum sowing date for maximum yield for a range of released and unreleased wheat cultivars.
Trials: 90KA79, 90LG50, 90LG51, 90N62
Nitrogen application.
Locations: Wagin, Tarin Rock, Newdegate Station and Lake Varley.
Determine the response of released and unreleased wheat cultivars to the application of nitrogen.
Trials: …