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Articles 1231 - 1260 of 1581
Full-Text Articles in Physical Sciences and Mathematics
The Causes Of Saltland : A Case Study At Esperance, P R. George, S. C. Bull
The Causes Of Saltland : A Case Study At Esperance, P R. George, S. C. Bull
Journal of the Department of Agriculture, Western Australia, Series 4
A series of bores on the Esperance Downs Research Station has demonstrated that the groundwater levels change after clearing, and the relatiojnnship between groundwater levels and soil salinity has been emphasised. This pattern of hydrological change leading to soil salinity problems applies widely in the wheatbelt.
Producing 20-Month Old Beef Steers Off Annual Pasture, K D. Greathead, D. J. Barker, W. J. Ryan
Producing 20-Month Old Beef Steers Off Annual Pasture, K D. Greathead, D. J. Barker, W. J. Ryan
Journal of the Department of Agriculture, Western Australia, Series 4
A recent Mt Barker experiment compared two systems of fodder conservation with continuous grazing, using two types of steers, at three stocking rates. Year-round performance, carcass composition, and resulting costs and returns per hectare were assessed.
Production per hectare was greatest from crossbred steers at the intermediate stocking rate with either type of fodder conservation.
New Header Treatment Aids Weevil Control, J H. Moulden
New Header Treatment Aids Weevil Control, J H. Moulden
Journal of the Department of Agriculture, Western Australia, Series 4
A new insecticide formulation supplied in high pressure cylinders simplifies weevil control in headers.
Supplementary Summary Report 1977 Pasture Species Investigations - Wheatbelt., N. R. Mckeown
Supplementary Summary Report 1977 Pasture Species Investigations - Wheatbelt., N. R. Mckeown
Experimental Summaries - Plant Research
Seed yields of early maturing subterranean clovers. A brief description of weather conditions in 1977, site details and results of germination counts and growth ratings were included in the Summary Report for 1977. Drill-sown trials - Seed yields from the trials varied from good in the southern wheatbelt to very poor in the northern areas. Test samples were taken from trials 77GE32, 77GE40 and 77GE41 in the Pindar and Tardun districts, 77ME22 at Koorda and 77TS25 at Perenjori but the quantity of seed did not warrant yield assessment. Trial 77M022 at Gabalong was not sampled. Seed yields from the rest …
General Phosphorus And Sulphur Trials, J. W. Bowden, R J. Lunt, K F. Longbottom
General Phosphorus And Sulphur Trials, J. W. Bowden, R J. Lunt, K F. Longbottom
Experimental Summaries - Plant Research
(A) Long Term Trials/Trial number: Super x Stocking Rate - 66M30. Super Sulphur and Stocking Rate - 68BR7. Maintenance P and S trials - 69E6, 68B1, 65A1, 65N5, 65C5, 69WH15 & 67N05. Continuous Cropping - 75LG26. Cropping Residual Value - 29M/148, 149. (B) Lupin Trials: Rate of P and S - 78A8, 78A9, 78BA9, 78BA10, 78C5, 78C6, 78E8, 78E9, 78WH7, 78WH8 & 78NA25. Current and Residual phosphorus - 75KA4. (C) Cereal Trials: Depth of Placement of P on Wheat - 78M38. Row spacing x P rates on Wheat - 78ME4. Current and Residual Nitrogen on Wheat - 77M033. (D) Pasture …
Clover Scorch, Annual Rye Grass, Legume Seed Inoculation, D. L. Chatel
Clover Scorch, Annual Rye Grass, Legume Seed Inoculation, D. L. Chatel
Experimental Summaries - Plant Research
List of experiments 78D1 - Clover varietal screening for tolerance to clover scorch - Denmark. Annual ryegrass toxicity- glasshouse experiments. Annual ryegrass toxicity- host range. 77TS35 - Second year nodulation of early flowering subterranean clovers - Bunjil. 78ME25A - The response of Nungarin subterranean clover to inoculation - on land previously sown to clover - Koorda. 78ME25B - The response of Nungarin subterranean clover to inoculation - on land new to clover - Koorda (East). 78ME25C - The response of Nungarin subterranean clover to inoculation - on old clover land - Belka. 78TS22 - The response of Nungarin subterranean clover …
Sowing Systems, Effect On Mineralisation Of Soil Nitrogen And Fallow Re-Assessment., D Tennant
Sowing Systems, Effect On Mineralisation Of Soil Nitrogen And Fallow Re-Assessment., D Tennant
Experimental Summaries - Plant Research
Planting systems investigation. Avondale, Esperance, Wongan Hills, Mt. Barker, Merrden research stations.
Fallow re-assessment, 72M29.
Phosphorus And Sulphur Interactions, 1978., J S. Yeates, R J. Lunt, K F. Longbottom
Phosphorus And Sulphur Interactions, 1978., J S. Yeates, R J. Lunt, K F. Longbottom
Experimental Summaries - Plant Research
Yield results, 78AL3, 78KE4, 78M08, 78BY3, 78BA8, 78BU3, 78N04, 78A7, 78C4, 78B4, 78MA2.
Soil sampling data.
Field Crops And Pasture Experiments., P Mcr Wood
Field Crops And Pasture Experiments., P Mcr Wood
Experimental Summaries - Plant Research
Lupinosis.
Badgingarra.
On-farm treatments.
Western Australian Soils Store Large Quantities Of Salt, C V. Malcolm, R. A. Nulsen, C. Henschke
Western Australian Soils Store Large Quantities Of Salt, C V. Malcolm, R. A. Nulsen, C. Henschke
Journal of the Department of Agriculture, Western Australia, Series 4
Enormous quantities of salt are stored in the soil in the agricultural areas of Western Australia. Small movements in this salt can produce large effects on farms.
Investigations Of Ryegrass Toxicity., Brian A. Stynes
Investigations Of Ryegrass Toxicity., Brian A. Stynes
Experimental Summaries - Plant Research
Effect of burning on the production of galls, 78KA13.
Effect of the nematicide Nemacur, on the development of toxicity in ryegrass pasture, 78KA15.
Survival of Anguina sp and emergence from galls, 78KA14.
Study of populationsof Anguina sp on plants, 78KA31.
Long Term Rotation Trials, 1978., I Rowland
Long Term Rotation Trials, 1978., I Rowland
Experimental Summaries - Plant Research
66M29, 67C13, 67N4, 68E5, 68SG5, 73SG16.
Predictive Test For Take-All; Effect Of Nitrogen Fertalizers On Wheat Rhizosphere Micro-Organisms., K Sivasithamparam
Predictive Test For Take-All; Effect Of Nitrogen Fertalizers On Wheat Rhizosphere Micro-Organisms., K Sivasithamparam
Experimental Summaries - Plant Research
Predictive test for take-all. The use of the most probable number technique.
Effect of nitrogen fertalizers on wheat rhizosphere micro-organisms, 78LG3, 78E16.
76LG25, 77LG20, 76E6, 77JE4, 78LG3, 78E16,
Summary Report 1977 Pasture Species Investigations - Wheatbelt, N. R. Mckeown
Summary Report 1977 Pasture Species Investigations - Wheatbelt, N. R. Mckeown
Experimental Summaries - Plant Research
Trials in progress - 68MO23, 70ME2, 71LG17, 71WH13, 76M5. Seasonal conditions. Grazing trials - 68MO23, 70ME2, 71LG17, 71WH13, 75N18, 76M5 - Mini-ley, Merredin. Legume species grazing management trial (West Moora) - 68M023. Comparison of production from Cyprus barrel medic and volunteer pasture (Lake Grace) - 71LG17. Comparison of production from Tornafield medic, serradella and subterranean clover (Wongan Hills Research Station) - 71WH13. Comparison of Geraldton and Northam subterranean clover (Walgoolan) - 70ME2. Early maturing subterranean clover grazing trial (Merredin Research Station) - 75M5. Small plot trials: Early maturing subterranean clovers Subterranean clover trials - southern wheatbelt - 75LG21, 75LG23, 76N16, …
Soil Salinity In Western Australia : A Summary, T C. Stoneman
Soil Salinity In Western Australia : A Summary, T C. Stoneman
Journal of the Department of Agriculture, Western Australia, Series 4
Soil salinity problems have long been recognised in Western Australia. The earliest published explanation in 1924 suggested that removing native vegetation increased stream salinity, and this basic cause has been confirmed by many studies since.
Pasture Species Investigations, High Rainfall Area, 1978., D A. Nicholas1978
Pasture Species Investigations, High Rainfall Area, 1978., D A. Nicholas1978
Experimental Summaries - Plant Research
Clover cultivar grazing trial, N. bannister.
Perennial versus annual grass grazing trial, Manjimup research station.
Pasture types and stocking rate trial, Denmark agricultural high school. Clover cultivar evaluation trials, 77BU10, 77AL22, 77D5, 77ES27, 77ES28, 77ES29, 78DE1, 78MN5, 78BR16, 78BU15.
Trikkala evaluation trial, Mt Barker research station, see also report of D. J. Gillespie.
Crop Competition Trials, M L. Poole
Crop Competition Trials, M L. Poole
Experimental Summaries - Plant Research
Rates of nitrogen on mixtures of wheat and ryegrass, 78H69.
Rates of Nungarin subclover under a wheat crop with and without applied nitrogen, 78WH70.
Rates of seedling wheat on competition between wheat and ryegrass, 78WH71.
Rates of ryegrass on wheat and. barley yields, 78WH72
Phosphorus Source Trials, M D.A Bolland
Phosphorus Source Trials, M D.A Bolland
Experimental Summaries - Plant Research
HIGH RAINFALL AREAS.
SAND: 76BU1 - New land phosphorus sources trial (pasture) T. O'Bryne, Yallingup. 76BU4 - Old land phosphorus sources trial (pasture) T. Combe, Busselton.
GRAVEL: 76MT10 - New land phosphorus sources trial (pasture) Mt. Barker Research Station. 76MT9 - Old land phosphorus sources trial (pasture) Mt. Barker Research Station. 77MT1 - New land particle size and method of cultivation phosphorus sources trial (pasture) Mt. Barker Research Station. 77MT2 - Old land phosphorus sources cropping trial (oats every third year). Mt. Barker Research Station.
MEDIUM RAINFALL AREAS.
SAND: 77E537 - Young land phosphorus sources trial (pasture) F. Fels, Esperance. …
The Comprehensive Water Supply Scheme, K J. Kelsall
The Comprehensive Water Supply Scheme, K J. Kelsall
Journal of the Department of Agriculture, Western Australia, Series 4
The Comprehensive Water Supply Scheme has been a great boon to the agricultural area, and it has received strong support from all political parties. The Scheme has been responsible for increased prosperity of country towns, the decentralisation of industry, and general improvements in the standard of living.
This is a look at the development of the Scheme.
Phosphorus And Sulphur Group, J. W. Bowden, R J. Lunt, K F. Longbottom
Phosphorus And Sulphur Group, J. W. Bowden, R J. Lunt, K F. Longbottom
Experimental Summaries - Plant Research
Long Term Trials Stocking and superphosphate trials - 66M30, 68BR7. Maintenance Phosphorus x Sulphur trials - 65A1, 65N5, 65C5, 69WH15, 68B1, 69AL3 and 67N05. Low Rainfall Crops and Pastures. Residual phosphorus trials - 76ES8, 75KA4, 75LG26 and 76NA5. Miscellaneous Cropping Trials. Rate of phosphorus on wheat - 77ES2, 77ME5, 77N03. N. P and seed rates on wheat - 77JE1. Row spacing, phosphorus and seed rate on wheat - 77ME6. Phosphorus on nitrogen build up - 77M033. Rate of super on old land lupins - 77A18 & 19, 77BA13 & 14, 77E20. Pasture Trials. Phosphorus and Sulphur on old land pasture …
Cultivar Evaluation In High Rainfall Areas, D J. Gillespie
Cultivar Evaluation In High Rainfall Areas, D J. Gillespie
Experimental Summaries - Plant Research
1. Trikkala Evaluation Trial 76MT3. A joint trial with D.A. Nicholas. The trial's aim is to compare the competitive ability under grazing of Trikkala and Yarloop clover on a waterlogged new land site. The competitive ability to be measured in the presence and absence of clover scorch. (Kabatiella caulivora). 2. Pasture deterioration. Field experiments. Three trials established in 1975 to determine whether various cultivation techniques could control root rot and. subsequent pasture deterioration have now concluded. 3. Lucerne productivity and persistence. 4. Effects of saline irrigation water on pasture production. During the 1976/77 irrigation season the effects on pasture production …
Longevity Of Doublegee Seed Under Continuous Pasture, D J. Gilbey
Longevity Of Doublegee Seed Under Continuous Pasture, D J. Gilbey
Experimental Summaries - Plant Research
Locality: Avondale, Wongan Hills and Chapman Research Stations. Background. Since 1974 pegged areas on the three research stations have been under continuous pasture and have been sampled annually to study the fate of the viable doublegee seed population. Each site was sprayed for doublegee control in the growing season before the first samples were taken in late summer of 73/74. The sites were again sprayed in the 1974 growing season except for Wongan Hills. The Wongan Hills site was cropped in 1976 and no further data is available. 74C7, 75WH65, 75WH66, 76AL11, 76C9, 76C6, 77C3, 77GE9, 77LC26, 77ME28, 77M028, 77N034, …
The European Wasp : A New Threat To W.A, Department Of Agriculture, Western Australia
The European Wasp : A New Threat To W.A, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
The European wasp was detected in Western australia for the first time in January and February 1977 in the metropolitan suburbs of Mosman Park, Cottesloe and Attadale.
So far it has only been found within an area of 8 km radius from Fremantle but the outer boundries of the infestation are still uncertain.
It is Department of agriculture policy to eradicate the European wasp, if possible, and to destroy all nests detected.
1977 Summary Of Results Of Field Experiments (January 1978), D L. Chatel
1977 Summary Of Results Of Field Experiments (January 1978), D L. Chatel
Experimental Summaries - Plant Research
1. Inoculation. 1.1. High rainfall. 1.2. Low rainfall. 2. Clover Scorch. 3. Rye grass toxicity. LIST OF EXPERIMENTS 1. The responses of varieties of Trifolium yanninicum to inoculation with different strains of rhizobia - Denmark. 2. The response of T. yanninicum to inoculation over two growing seasons - Denmark. 3. The response of white and strawberry clovers to inoculation - Denmark. 4. The response of sub clover to inoculation - spaced row trial - Merredin. 5. The response of sub clover to inoculation - plot trial (Not sampled) - Merredin. 6. The response of sub clover to inoculation - spaced …
Clover And Medic Breeding And Selection 1977, C. M. Francis
Clover And Medic Breeding And Selection 1977, C. M. Francis
Experimental Summaries - Plant Research
Early Maturing Low Oestrogen Crossbreds. Disease Resistant Clovers for-Higher Rainfall Regions. Waterlogging Resistant Clovers (T. yanninicum). Overseas Collections. Early Maturing Medics from Libya. Table 1. Seed Yields of Medicago Species.
Cereal Foliage Disease Survey, T N. Khan, A. G. P. Brown
Cereal Foliage Disease Survey, T N. Khan, A. G. P. Brown
Experimental Summaries - Plant Research
Cereal Foliage Disease Survey A dry season reduced disease to insignificant levels (as measured by this survey) in all areas except the south west. Late rains may have produced some damage to wheat by S. nodorum however but this was probably confined to southern areas. In barley net blotch which has been declining re appeared a major disease in 1977 excepting high rainfall areas, where scald continued to be severe. The level of scald infection was considerably lower which may be associated with relatively higher temperatures and low rainfall. Variety Clipper continued to show high degree of tolerance to net …
Summary Of 1977 Field Trials, M. L. Poole
Summary Of 1977 Field Trials, M. L. Poole
Experimental Summaries - Plant Research
Competition between wheat and annual ryegrass at six rates of seeding wheat, six ryegrass densities and five rates of nitrogen fertiliser (Wongan Hills Research Station) - 77WH6. Time of removal of annual ryegrass from a wheat crop (Wongan Hills Research Station)- 77WH7. Effect of different tillage systems on establishment and yield of wheat (Merredin Research Station) - 77M52. Rapeseed variety trial (Lancelin) - 77MO30. Shedding losses in rapeseed (Mount Barker Research Station) - 77MT25. Time of germination of ryegrass on wheat yield (Wongan Hills Research Station) - 77WH47. Sunflower agronomy trial (Bramley research Station) - 77B5. Other trials: 1. Co-operative …
Planting Systems Investigations, D Tennant
Planting Systems Investigations, D Tennant
Experimental Summaries - Plant Research
Planting systems investigation. l. Planting depths. 2. Soil water (0-lOcm) near planting. 3. Mineralised N near planting. Planting systems investigation. Two trials were initiated on each of five Research Stations in collaboration with G.A. Pearce and J.E. Holmes. Details in respect of treatments, operations, fertilisers, rainfall, yields and weed populations are provided by these officers in their respective reports. For the purposes of this report, attention is drawn to two findings of a preliminary study of similar planting systems in 1976. TABLE 1. DepthS of planting (cm). Means of 40 to 80 estimates - 77A16, 77E18, 77M13, 77MT15, 77WH17. TABLE …
Moisture Responses Of Wheat (Merredin), R Weir
Moisture Responses Of Wheat (Merredin), R Weir
Experimental Summaries - Plant Research
A trial was planted at Merredin in 1976 on Salmon Gum soil with the aim of testing the drought tolerance of Gamenya, Madden and Insignia wheat.
Water Supplies On Wheatbelt Farms : A General Picture, I A F Laing
Water Supplies On Wheatbelt Farms : A General Picture, I A F Laing
Journal of the Department of Agriculture, Western Australia, Series 4
In good rainfall years, farm dams provide water fo more than 50 per cent of the total stock in the wheatbelt.
Other sources include ground water supplies and the piped Comprehensive Water Scheme.
The March 1970 census included questions on farm water supplies including how farmers coped in the 1969-70 drought.