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Articles 1321 - 1350 of 1581
Full-Text Articles in Physical Sciences and Mathematics
1975 Trials On Doublegee, D J. Gilbey
1975 Trials On Doublegee, D J. Gilbey
Experimental Summaries - Plant Research
75A16, 75A17, 75C13, 75MO36, 75MO37, 75WH21, 75WH22. Biological control of doublegee.
1975 Mn Drilled And Sprayed On Unicrop, J. W. Gartrell
1975 Mn Drilled And Sprayed On Unicrop, J. W. Gartrell
Experimental Summaries - Plant Research
75AL25 (with Trevenen) Mn Drilled and Sprayed on Unicrop, 75AL26, 75ES28, 785ES29, 75GE32, 75MO31, 75MO33, 75TS24, 75TS25.
1975 Evaluation Of New Subterranean Clover Cultivars, C. M. Francis
1975 Evaluation Of New Subterranean Clover Cultivars, C. M. Francis
Experimental Summaries - Plant Research
This year's trials have added little to the data already accumulated on the corssbreds 175,1 and 239.2 (Table 1). Higher seed yields at Merredin would have included some hard seed from the previous year. The lack of reliable data from the May sowings due to poor viability of some seed lines (including 175 and 239) grown at Medina was unfortunate. Data from Lake King is not yet available. Geraldton performed surprisingly well in the late sowings despite overall low seed yields. With late sowing its flowering date was within a few days of the crossbreds so that late sowing appears …
Summary Of Trial Results - 1975, N. R. Mckeown
Summary Of Trial Results - 1975, N. R. Mckeown
Experimental Summaries - Plant Research
1. From September 1971 to late August 1974 there was a mean reduction of legume content in the medic pastures from 40 per cent to 22.0 per cent but the reduction at 7.4 sh/ha was to 31 per cent. The drop in woolly clover content on the volunteer pastures was closely similar. 2. In 1972, at 7.4 sheep/ha a difference in body weight of 7-9 kg rapidly developed in favour of sheep grazing barrel medic compared with sheep on volunteer pasture. This difference was maintained consistently throughout the trial. At lower stocking rates the differences were smaller and less consistent. …
1975 Nitrogenous Fertilisers For Cereals - Trials With Wheat, Oats And Barley, M. G. Mason
1975 Nitrogenous Fertilisers For Cereals - Trials With Wheat, Oats And Barley, M. G. Mason
Experimental Summaries - Plant Research
Rates of nitrogen on wheat - soil test - Fifty-one sites were selected and soil sampled during February- March. All these proposed trials consisted of four replications and these reps were soil sampled separately. In each rep. 20 samples were taken to 10cm depth with pogo stick samplers. In addition, from three holes at random across each trial bulk samples were obtained from the 0-15, 15-30 and 30-45 cm soil intervals These soil samples were air dried (if not already dry) and sieved to remove > 2 mm fraction (gravel). Portions of these < 2mm fractions from the 0-10cm samples were sent to the Government Chemical Laboratories and to C.S.B.P. & Farmers Ltd. At C.S.B.P. analyses were carried out to determine P and K content and the C.S.B.P. soil nitrogen test was also carried out on them. This measures nitrate content before and after incubation with moist soil at 32c for seven days. A measurement was also made after 14 days. At Government Chemical Laboratories analyses were to be carried for Organic carbon and for a number of nitrogen fractions, including Total Nitrogen, MH4 + NO3 Nitrogen and several incubation techniques. These were also to be determined on the profile samples, which were also to be subject to the following analyses: a) Mechanical Analysis b) pH (in water) c) Cation Exchange Capacity d) Moisture Holding Capacity All of these trials were planted except for one at Jerramungup, where the marker pegs were ploughed out by the farmer. Vegetative cuts were then taken during the August - September period on 46 of the remaining 50 sites. Three of the other four sites were abandoned because of severe waterlogging (Neridup), extreme weediness (Nugadong) or due to poor plant survival (possibly due to webworm) combined with weeds (Mallalying). The trial at Wannamal was sown to oats, by the farmer. The nitrogen treatments were still applied and the trial was retained but not sampled for dry matter production. These samples were to be analysed for nitrogen content. Dry matter production and grain yields are set out in the following tables. 61M11, 75A1. 75A2, 75A3, 75AL1, 75AL2, 75BA2, 75BA3, 75BR1, 75BR2, 75C1, 75C2, 75C3, 75E2, 75E3, 75ES1, 75ES2, 75ES4, 75GE1, 75GE2, 75GE3, 75JE1, 5JE2, 75KA1, 75KA2, 75LG1, 75LG2, 75LG3, 75M2, 75M3,75M4, 75ME1, 75ME2, 75ME3, 75MO1, 75MO2, 75MO4, 75MT2, 75MT3, 75N1, 75N2, 75N3, 75NA1, 75NA3. 75NA4, 75NO2, 75NO3, 75SG1, 75SG2, 75TS2, 75TS3, 75TS4, 75WH4, 75WH5, 75WH6, 75WH7.
Evaluation Of The Systemic Nematicide Phenamiphos To Control The Nematode Anguina Sp In Toxic Ryegrass Pasture, B A. Stynes
Evaluation Of The Systemic Nematicide Phenamiphos To Control The Nematode Anguina Sp In Toxic Ryegrass Pasture, B A. Stynes
Experimental Summaries - Plant Research
Field trials done in 1974 showed that phenamiphos could be used to control Anguina sp. and suggested that low rates may be effective with critical timing of applications. These possibilities were investigated in 1975. Locality - Katanning - F. Quartermaine and c. Butterworth. Gnowangerup - J. Griffith. Tables 1 and 2 show the absolute levels of nematodes in ryegrass seed and the density of nematodes per unit area of pasture after treatment with phenamiphos. All rates of nematicide reduced the level and density of nematodes; the highest rate being slightly more effective. The spray schedule including sprays in July and …
1975 Weed Control In Lupin Investigations, J M. Allen
1975 Weed Control In Lupin Investigations, J M. Allen
Experimental Summaries - Plant Research
1. The results with pre emergence herbicides confirm previous recommendations of simazine 1.25 kg/ha on heavy soil and diuron 1.25 kg/ha on light soils with the following modification. a) Simazine rates need to be increased to 3 kg/ha on very early (April) sovm crops in southern areas. b) Simazine has not damaged lupins in southern areas and where ryegrass is a major problem on sandy soils (i.e. Esperance) it is likely to give better responses than diuron. 2. As suspected in previous years simazine can by way of effective weed control produce a marked lupin vegetative response without any increase …
Decide : How Much Superphosphate, G A. Robertson, J. W. Bowden, N. J. Halse
Decide : How Much Superphosphate, G A. Robertson, J. W. Bowden, N. J. Halse
Journal of the Department of Agriculture, Western Australia, Series 4
* A 400 per cent increase in ihe price of superphosphate has reduced the economic optimum rates of super for crops and pastures in 1975.
* Many factors, both biological and economic, must be taken into account in determining the rate of superphosphate to apply.
• DECIDE, a model developed by CSIRO and the Department of Agriculture, provides a formal system in which all these factors can be considered.
• DECIDE is based on the results of all research on superphosphate carried out in Western Australia. However, each farmer's own knowledge of his farm, the soils, crops and animals is …
1975 Fallow Re-Assessment And Soil Physical Data Accumulation, D Tennant
1975 Fallow Re-Assessment And Soil Physical Data Accumulation, D Tennant
Experimental Summaries - Plant Research
This report summarises progress and data available for the following investigations. 1. Fallow Re-assessment - 72M29. 2. Soil Physical Data Accumulation. (a) Evaluation of methods of bulk density measurement. (b) Water holding capacities and mechanical analyses of wheatbelt soils. (c) Water holding capacities of metropolitan sands. TABLE 3 Water holding capacities (1/10 - 15 Atmosphere water contents) of metropolitan sands (mm of water). Bulk density of 1.6 assumed. 1. Medina Research Station. 2. Morley White Sand. 3. Karrakatta Sand. 4. Bassendean Sand. 5. South Perth Lawn. 6. South Perth Scrub. 7. Underwood Avenue Research Station. 8. Floreat Park Sand. 9. …
Summary Of 1974 Weed Control In Lupin Evaluations, J. G. Allen
Summary Of 1974 Weed Control In Lupin Evaluations, J. G. Allen
Experimental Summaries - Plant Research
Lupin Trials 1974 1. Herbicides x Depth of Seeding - There is no evidence of a herbicide x depth of seeding interaction in lupin plant numbers, at either Broomehill or Eradu. The lupin plants on the shallow sown plots were reported to be more effected by herbicides than on the deeper sown plots at Eradu. It is suggested that shallow seeding may be a factor in predisposing lupin crops to simazine damage particularly on sandy soils, however it has not been possible to demonstrate such on effect. 2. Herbicides x Time of Seeding - At two sites (Myrup, Namban) there …
1975 Pasture Species Investigations High Rainfall Area, D. A. Nicholas
1975 Pasture Species Investigations High Rainfall Area, D. A. Nicholas
Experimental Summaries - Plant Research
Contents - 1. Clover cultivar grazing trial - North Bannister - 68NA1. 2. Clover cultivars x red legged earth mite - Chowerup - 70BR16. 3. Pastures species x stocking rate - Denmark - 72D1. 4. Stocking rate and conservation for steer beef production - Mt. Barker Research Station - 71MT46. 5. Perennial versus annual grass grazing trial - Manjimup Research Station - 72MN5. 6. Trials in Association - Albany Regional Office. (i) Rate and time of fungicide on clover scorch - South Stirlings - 75AL33. (ii) Rate and types of fungicide on clover scorch - South Stirlings - 75AL34. (iii) …
1975 Experimental Programme With Lupins, G H. Walton
1975 Experimental Programme With Lupins, G H. Walton
Experimental Summaries - Plant Research
74MO10 - Pasture establishment under a lupin orop (Wheat crqp 1975). 75AL3 - 6 Time x 3 Rates x 2 Varieties x 2 Herbicide Factorial. 75B3 - Lupin Agronomy in High Rainfall Area. 75BA4 - Early planting of Unicrop lupin. 75GE4 - Polyculture of Wheat and Lupin. 75GE5 - Rate of seeding Unicrop - low rainfall site. 75JE4 - Time of planting x rate of seeding lupins. 74MO10 - Pasture establishment under a lupin crop (Wheat crop 1975). 75MO6 - Time of planting x rate of seeding with L. albus cv WB2. 75MO7 - Pasture establishment under lupin crops. 75MO12 …
1975 Lupin Diseases, P M. Wood
1975 Lupin Diseases, P M. Wood
Experimental Summaries - Plant Research
Sclerotinia stem rot, a fungal disease, is becoming increasingly important. This disease can attack the stem at any point from the stem base to the first laterals. Lodging can result if the canker is severe enough. Superficial cankers can disrupt sap flow resulting in poorly filled pods. The fungicide Benlate is used overseas to control Sclerotinia in bean plantings, Accordingly, a fungicide trial was planned to estimate yield losses resulting from Sclerotinia infection. A secondary aim was to examine any yield response which could be attributed to reported growth promoting properties of benomyl - 75MT33. Brown spot of lupins - …
1975 Field Experiments And Cereal Disease Surveys, A. G. P. Brown
1975 Field Experiments And Cereal Disease Surveys, A. G. P. Brown
Experimental Summaries - Plant Research
1. Septoria disease of wheat - 75BA17. 2. Fungicide seed dressing on lupins 3. Cereal Disease survey - Table 7 - Zone l. Beverley R.S. B3 2. Badgingarra A2 3. Chapman Bl 4. Gibson A5 5. Merredin C3 6. Mt Barker A5 7. Newdegate B4 8. Salmon Gums C5 9. Wongan Hills B2 10. Woodgenellup A5 11. Chowerup A5 12. Neradup A5 13. W. Grass Patch B5 14. E. Salmon Gums C5 15. Mellewa Cl 16. Yuna Cl 17. N. Mingenew Bl 18. Mingenew Bl 19. Gairdner River A5 20. Jerramungup B5 21. Ravensthorpe B5 22. N. Kojonup A4 23. …
1975 Clover Scorch, D. L. Chatel
1975 Clover Scorch, D. L. Chatel
Experimental Summaries - Plant Research
(Feb 1976) This report covers the three major clover scorch activities for the year: A) The tolerance screening at Denmark. B) The dry matter production in the second year of a mowing trial, in which clovers with and without scorch were compared the previous year. C) A summary of the first four years of a disease incidence survey - and an examination of some meteorological factors in relation to disease development. The first two were done jointly with Dr C.M. Francis. The following tentative hypotheses are advanced to explain the regional differences in the distribution of clover scorch: a) The …
1975 Field Experiments On Legume Seed Inoculation, D. L. Chatel
1975 Field Experiments On Legume Seed Inoculation, D. L. Chatel
Experimental Summaries - Plant Research
(January 1976) LIST OF EXPERIMENTS 1. The effect of cobalt and seed inoculation on Unicrop lupins. GREEN RANGE 2. The effect of cobalt and seed inoculation on Unicrop lupins. BRAMLEY RESEARCH STATION 3. The effect of cobalt and seed inoculation on Unicrop lupins. McALINDEN 4. The effect; of cobalt and seed inoculation on Unicrop lupins. CHOWERUP 5. The effect of cobalt and seed inoculation on Unicrop lupins. ALANO OKA 6. The effect of cobalt and seed inoculation on Unicrop lupins. LANCELIN 7. The effect of inoculation on Uni crop lupins. KATANNING 8. The effect of inoculation on Uni crop lupins. …
Nitrogenous Fertilisers For Cereal Production, M G. Mason
Nitrogenous Fertilisers For Cereal Production, M G. Mason
Journal of the Department of Agriculture, Western Australia, Series 4
Among the many factors influencing crop response to nitrogen applications, the most important are the season, soil type, paddock history, time of application and source of nitrogen. Before deciding whether to use nitrogen on a cereal crop, which source to use and at what rate, the farmer needs some understanding of how these factors work.
Time And Rate, Comparative Fungicide, Fungicide Application Method Trial, Clover Scorch Economy Demonstrations, A Bokor
Experimental Summaries - Plant Research
Time and Rate Trial 75AL33 Comparative Fungicide Trial 75AL34. Fungicide Application Method Trial 75D8. Clover Scorch Economy Demonstrations 75AL35.
1975 Drought Responses Of Wheat Cultivars - Environment Responses Of Subterranean Clover., R N. Weir
1975 Drought Responses Of Wheat Cultivars - Environment Responses Of Subterranean Clover., R N. Weir
Experimental Summaries - Plant Research
Environment responses of subterranean clover. Aim - To clarify the responses of four cultivars to temperature, vernalisation and photoperiod. Method - Dinninup, Midland B, Geraldton and Blackwood sub clover was grown in phytotron cabinets under 14 hour and 10 hour photoperiods and temperatures 10°c day/5°c night, l5/l0°c, 20/l5°C, 25/20°c. A seed vernalisation treatment of 6 weeks refrigeration of swelled seed was included. Dissections were made to observe first floral initiation and first flower production was noted. Conclusions - Higher temperatures either had no effect or delayed floral initiation, but accelerated flower development greatly from initiation to anthesis. Photoperiod and vernalisation …
1975 Phosphorus And Sulphur Group Results, J. W. Bowden, B. Scurr, R Lunt, M Baker
1975 Phosphorus And Sulphur Group Results, J. W. Bowden, B. Scurr, R Lunt, M Baker
Experimental Summaries - Plant Research
Stocking X Super Rate - 66M30, 68BR7. Residual Value of Superphosphate - 66 & 68LG1, 66ME3, 66NO7, 67NO11, 67NO5, 74GE2, 74MO7, 74MO8. Maintainance P X S Trials - 65A1, 65C5, 65N5, 67NO11, 68AL3, 68B1, 69AL2, 69AL3, 69E6, 69WH15. Miscellaneous trials - Rates and Methods of Super on Wheat Lupins and Clover 74LG5, 75A20 and 21; 75ES5, 6, and 7; 75GE6 and 7; 75JE7, 75JE5, 75KA3 and 4; 75LG4 and 7; 75LG26; 75MO9, 75MO28, 75NA4, 75NO5 and 6. High Rainfall Pasture Trials - 75AL4 and 5; 75AR3 and 4; 75BR11, 12, and 13; 75BY5, 6, and 8; 75BU8 and 10; 75DE2, …
The Banana Industry At Carnarvon, John Roger Burt
The Banana Industry At Carnarvon, John Roger Burt
Journal of the Department of Agriculture, Western Australia, Series 4
In viewing the semi-arid conditions of the West Gascoyne, visitors are surprised to see a thriving banana industry at the mouth of the Gascoyne River, 930 kilometres north of Perth. The natural vegetation in the plantation area consists mainly of stunted gums, low acacia scrub and salt bush.
Despite the adverse climatic conditions, the average yields of Carnarvon bananas are double those of banana areas in other states.
Fruit In W.A., Department Of Agriculture And Food, Western Australia
Fruit In W.A., Department Of Agriculture And Food, Western Australia
Bulletins - 3000 - 3999
The main fruit growing districts of Western Australia are in the Mediterranean climate areas of the south-west. Apples, pears, stonefruit, citrus and vines are grown on a commercial basis. Figs, mulberries and olives are also grown, but not in big commercial quantities.
Lupin Agronomy: Time Of Planting, Seeding Rate And Variety In A Long Season Area., M. W. Perry
Lupin Agronomy: Time Of Planting, Seeding Rate And Variety In A Long Season Area., M. W. Perry
Experimental Summaries - Plant Research
To evaluate lupin varieties and agronomic practices in a long season district using a factorial experimental design. 74A16a Location - Warriup 57 km E. of .Albany. 74A16b Green Range, 70 km E. of Albany. Time of Planting (4) Seeding Rates (4) Varieties (4) Fertiliser.
Summary Of Experimental Work 1974, G Walton
Summary Of Experimental Work 1974, G Walton
Experimental Summaries - Plant Research
Lupinus albus cv WB2: Maximum yield response to 36 plants/m2 at Avondale (1973 and 1974) and Mt Barker Research Station in 1973 (achieved with 180 to 200 kg/ha seed rate), Maximum yield response to 48 plants/m2 at Chapman 1973 and 1974 and at Eradu 1974 (achieved with 220 tG 240 kg/ha). Very good yield results: Season - site Avondale 1973-3300, 1974-2250. kg/ha Chapman 1973-2800, 1974-2400. Mt Barker 1973-1900. 74A2 - Rates Of seeding for L, albus cv WB2. 74A21 - Rates of super on two lupin varieties. 74BR1 - Pasture regeneration after lupin survey. 74C4 - Rates of seeding L. …
Grain Moisture Problems On The South Coast, J A. Parish, G. H. Jones
Grain Moisture Problems On The South Coast, J A. Parish, G. H. Jones
Journal of the Department of Agriculture, Western Australia, Series 4
In most West Australian grain growing districts high temperatures and dry weather at grain maturation are ideal for harvesting and enable delivery of grain with acceptable moisture levels. Grain from W.A. is known in world markets as a good quality dry product which is unlikely to deteriorate in storage. However, growers in coastal areas and particularly those south of Narrogin sometimes have trouble harvesting grain below the receival limit of 12 per cent moisture.
Grain Moisture And The Weather : What Can The Records Tell Us?, M W. Perry, P. A. Fievez
Grain Moisture And The Weather : What Can The Records Tell Us?, M W. Perry, P. A. Fievez
Journal of the Department of Agriculture, Western Australia, Series 4
The expansion of cereal production in areas along the south coast has exposed harvesting problems associated with high grain moisture.
A grain delivery standard of 12 per cent moisture means that, in the absence of grain drying facilities, harvesting times in the field are restricted to those hours when grain moisture falls below this figure.
Grain moisture, however, remains the major problem and for planning purposes, producers require an estimate of the harvesting time available in a given year. This will depend on all the climatic variables which affect grain moisture. These include rainfall and dew which deposit water directly …
Conservation Of The National Estate, Department Of Agriculture, Western Australia
Conservation Of The National Estate, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
In 1973 the Australian Government established a Committee of Inquiry under Mr. Justice R. M. Hope to inquire into the National Estate. Under its terms of reference the Committee was to assess the nature and condition of the National Estate and the measures which were being and should be taken for its preservation and enhancement.
Officers of the Department of Agriculture recognise that there are basic natural resources such as land, water, gene material and ecosystems which are essential elements of the National Estate held in trust by successive generations.
In a submission to the Inquiry, matters of particular concern …
The Place Of Lucerne In Western Australian Agriculture, N J. Halse, C. M. Francis
The Place Of Lucerne In Western Australian Agriculture, N J. Halse, C. M. Francis
Journal of the Department of Agriculture, Western Australia, Series 4
Lucerne, the world's most important fodder legume, has never won largescale acceptance in West Australian farming, largely because of our success with productive subterranean clover pastures. But recent disease problems on sub. clover stands have led to greater interest in alternative species, especially lucerne, for higher rainfall areas.
This article summarises our knowledge of lucerne establishment and management in W.A. and reviews current research aimed at achieving better results from lucerne.
Interim Summary 1974 Experiments, M L. Poole
Interim Summary 1974 Experiments, M L. Poole
Experimental Summaries - Plant Research
Data presented for: 74MT38 - Variety Trial - New rape and radish varieties 74MT27 - Rates of seed, time of planting on Crambe abyssinica 74GE'1 ·- Time of Seeding X Rate of Nitrogen on Sunflowers. Oilseed and Grain Legumes under Summer Irrigation. Sunflower Progress Report. Safflower Progress Report. Response of Oilseed Crops to Climate. Introduction - The results given in this report provide an interim record of 1974 experimental work with oilseed crops. An essential part of oilseed trial programme is an evaluation of the quantity and quality of oil produced by different species and varieties under a range of …
Summary Of Experimental Results - Wheat Protein Survey, R Weir
Summary Of Experimental Results - Wheat Protein Survey, R Weir
Experimental Summaries - Plant Research
Wheat protein survey Seeding rate x grain protein - 72NA33. Seeding rate x grain protein - 72M28. Temperature effects on flower set of lupin - 72GL4. Wheat protein survey - A survey of 130 farmers in 13 Shires of the high protein area around Merredin was undertaken in the few weeks prior to the 1972 harvest. Grain samples were forwarded by farmers after supplying site data including yield estimate. A soil sample was collected on which % soil N was determined. This information together with grain protein percentage was included in multiple regression, and stepwise regression analyses.