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Articles 38791 - 38820 of 39773
Full-Text Articles in Physical Sciences and Mathematics
Population Studies Of The Desert Cottontail (Sylvilagus Auduboni), Black-Tailed Jackrabbit (Lepus Californicus) And Allen's Jackrabbit (Lepus Alleni) In The Sonoran Desert, C. R. Hungerford, C. H. Lowe, R. L. Madsen
Population Studies Of The Desert Cottontail (Sylvilagus Auduboni), Black-Tailed Jackrabbit (Lepus Californicus) And Allen's Jackrabbit (Lepus Alleni) In The Sonoran Desert, C. R. Hungerford, C. H. Lowe, R. L. Madsen
Memorandum
No abstract provided.
An Approach For A Photosynthesis Model Of Desert Plants, E. D. Schultze, O. L. Lange, A. Olsen
An Approach For A Photosynthesis Model Of Desert Plants, E. D. Schultze, O. L. Lange, A. Olsen
Memorandum
No abstract provided.
Meteorological Input To General-Purpose Models: A New Subroutine, David W. Goodall, Janice Robinson
Meteorological Input To General-Purpose Models: A New Subroutine, David W. Goodall, Janice Robinson
Memorandum
No abstract provided.
Simulations Of Desert Biome Sites Using The General-Purpose Model, C. Gist, David W. Goodall
Simulations Of Desert Biome Sites Using The General-Purpose Model, C. Gist, David W. Goodall
Memorandum
No abstract provided.
Demographic And Individual Growth Studies For Dipodomys Ordii, Peromyscus Maniculatus And Reithrodnotomys Megalotis, H. Duane Smith, Clive D. Jorgensen, Gary H. Richins, Nils C. Stenseth
Demographic And Individual Growth Studies For Dipodomys Ordii, Peromyscus Maniculatus And Reithrodnotomys Megalotis, H. Duane Smith, Clive D. Jorgensen, Gary H. Richins, Nils C. Stenseth
Memorandum
No abstract provided.
Terrestrial Model: Soil Processes (Version Iv), Paul Lommen
Terrestrial Model: Soil Processes (Version Iv), Paul Lommen
Memorandum
No abstract provided.
Classification And Quantification Of Invertebrate Activity And The Role Of Invertebrates In Nitrogen Processing In Plants, Litter And Soil In Curlew Valley, P. R. Sferra
Memorandum
No abstract provided.
Ecology Of Cool Desert Annuals, Lionel G. Klikoff, D. C. Freeman
Ecology Of Cool Desert Annuals, Lionel G. Klikoff, D. C. Freeman
Memorandum
No abstract provided.
Nitrogen Transformations In Rock Valley And Adjacent Areas Of The Mohave Desert, Arthur Wallace, E. M. Romney, J. W. Cha, S. M. Soufi
Nitrogen Transformations In Rock Valley And Adjacent Areas Of The Mohave Desert, Arthur Wallace, E. M. Romney, J. W. Cha, S. M. Soufi
Memorandum
No abstract provided.
A Decomposition Submodel, H. Parnas, J. Radford
Pasture Species Investigations - High Rainfall Area 1974, D. A. Nicholas
Pasture Species Investigations - High Rainfall Area 1974, D. A. Nicholas
Experimental Summaries - Plant Research
1. Clover cultivar grazing trial North Bannister - 68NA1. 2. Clover cultivar grazing trial Chowerup - 70BR15. 3. Clover cultivars x redlegged mite - Chowerup - 70BR16. 4. Pasture types x stocking rate: - Denmark - 72D1. 5. Stocking rate and conservation for steer beef production - Mt. Barker Research Station - 71MT46. 6. Perennial versus annual grass grazing trial - Manjimup Research Station - 72MN5 - 72MN6
Summary Of 1974 Phosphorus And Sulphur Group, J W. Bowden, B. Scurr, R Lunt
Summary Of 1974 Phosphorus And Sulphur Group, J W. Bowden, B. Scurr, R Lunt
Experimental Summaries - Plant Research
Stocking x Super Rate - Merredin - 66M30. Twitcham - 62MB9. Kojonup - 68BR7. Maintenance P x S Trials - I. Residual Value - 66N07 and 66ME3. II. Wheatbelt Rate Trials - 67N011, 66LG1, 68LG1, 67NO5, 6NA3, 67GE2, 66M06 and 67M01. III. Wheatbelt Research Stations and Farmers- 65C5, 65A1, 65N5,69WH15 and 66N09. IV. Higher Rainfall Area Trials - 68B1, 68BU2, 68BR5,68AL3, 69E6, 69AL2 and 69AL3. Miscellaneous Trials - 74GE2, 74GE4, 74GE5,74JE3, 74LG4, 74M06, 74M07, 74TS3, 74NA3 74NA4, 74M07, 74TS4.
1974 Potash Trials 2. Yield Data, W. J. Cox
1974 Potash Trials 2. Yield Data, W. J. Cox
Experimental Summaries - Plant Research
Experiment nos: 74AL1, 74AL2, 74AR1, 74AR2,74BU1, 74BU2, 74BU3, 74BU4, 74BY1, 74 BY2, 74BY3, 74DE1, 74DE2, 74DE3, 74DE4, 74DE5, 74DE6, 74HA1, 74HA2, 74HA3, 74MA1, 74MA2, 74MA3, 74MO1, 74MO2, 74MO3, 74NA1, 74NA2.
1974 The Ecology And Control Of Doublegee (Emex Australis) And Emex Spinosa, D J. Gilbey
1974 The Ecology And Control Of Doublegee (Emex Australis) And Emex Spinosa, D J. Gilbey
Experimental Summaries - Plant Research
The objectives of the field experimental programme for 1974 were to - 1) Evaluate a technique to measure pasture loss as a result of doublegee infestation at Merredin, Wongan.Hills and Chapman. 2) Evaluate the effect of cultural and herbicide treatment combinations on the magnitude and distribution of viable doublegee seeds in the soil at Avondale, Merredin, Wongan Hills and Chapman. 3) Measure the magnitude and distribution of viable doublegee seeds in the soil from paddocks representing each year of a two crop, plus three year pastureley rotation at Avondale, Merredin, Wongan Hills and Chapman. 4) Screen herbicides for selective control …
Pasture Deterioration - High Rainfall Areas, D J. Gillespie
Pasture Deterioration - High Rainfall Areas, D J. Gillespie
Experimental Summaries - Plant Research
a. Pasture deterioration - High rainfall areas - A farm at Karridale (near Augusta) exhibiting "classic" pasture deterioration symptoms was closely monitored throughout 1974. This farm has paddocks ranging from relatively newly sown pastures with a high clover percentage, few weeds and high dry matter production (resown 1973 and 1974), through to extremely poor pastures with as little as 3 % clover and a weed component of over 80% (resown 1970 and 1971)... b. Midland B competition studies (69Mt19) -This grazing trial was sown in 1969 to plots of pure Midland B, pure Woogenellup and to three mixtures of the …
Weed Trials 1974 Summary - Annual Ryegrass Control - Wild Oats - Cereal Tolerance To 2,4-D - Annual Ryegrass Toxicity, G. A. Pearce
Weed Trials 1974 Summary - Annual Ryegrass Control - Wild Oats - Cereal Tolerance To 2,4-D - Annual Ryegrass Toxicity, G. A. Pearce
Experimental Summaries - Plant Research
A herbicide trial and demonstration was commenced in 1973 and the treatment repeated in 1974. the objective was to control the annual ryegrass which was the dominant species and allow the scattered plants of sub clover to re-establish a clover dominant pasture. (See table) Despite the high reduction of seed stalks formed on some treatments in 1973 the ryegrass was only reduced by 50 per cent on the best treatment in 1974, The reduction in seed production in 1974 will no doubt further reduce the density of ryegrass in 1975 but eradication is unlikely. The value of burning in destroying …
Pasture Species Investigations - Wheat Belt (May, 1975), N. R. Mckeown
Pasture Species Investigations - Wheat Belt (May, 1975), N. R. Mckeown
Experimental Summaries - Plant Research
Results from trials comparing the growth and persistence of a number of annual pasture legumes are presented in this report. Rainfall conditions during the year are described briefly and a table of annual and growing season rainfall at relevant centres is appended. The experiments are grouped as follows according to average annual rainfall:- Zone A - Average annual rainfall > 400 mm Zone B - Average annual rainfall 345 - 400 mm Zone C - Average annual rainfall < 345 mm and then, further, on soil type. District Rainfall, 1974. 71LG16,, 72LG3, 74KA3, 70OTS2, 72TS5, 70NA3, 71TS22, 74NO3, 70ME4. The early break, with good rainfall continuing through most of the growing season, provided optimal conditions for most wheat belt trials. These conditions were in direct contrast to the dry years of the late 1960's and early 1970's. In 1974, legume growth on droughty deep sands should have been at its best. Serradella responded at Kukerin in direct relationship with earlier heavy dressings of potash. West of Three Springs, serradella and Tornafield medic stayed a little ahead of Harbinger medic and well ahead of Daliak sub. clover and rose clover. On deep sands at Marchagee and Arrino, subterranean clover was the only species worth considering. The failure of Eragrostis curvula to persist through the dry 1973-74 summer after good germination in late winter, indicates a need for more work on the establishment of this grass on deep sands. The low yields of dry matter at Tincurrin do not offer much incentive for such work, but Eragrostis, lupins and serradella probably give the best chance of pasturing the grossly infertile, erodable sands. Under favourable conditions, Geraldton sub. clover continued to show its versatility and aggressiveness. On an alkaline loamy sand at Lake King, waterlogged for periods during the winter, Dwalganup, Geraldton and Northam A produced more dry matter than a wide range of other pasture legumes. At Walgoolan, Geraldton maintained better than 503 content in mixtures with other sub. clover cultivars sown in 1970, while in a trial at Marchagee there was evidence of gradual, aggressive regeneration of Geraldton from a sparse pasture sown before the trial. Only two new legume species trials were planted in 1974, and these were not successful. Trial 74KA3, east of Katanning, demonstrated the need for timely planting. Had seed been available on time, the trial would have been planted before the onset of heavy rains and would have given better results. The failure of Tornafield and Harbinger on 74N03 should not weight the record unduly against these medics; :they have never excelled on clay loams, and they were sorely harassed by redlegged earthmite. The medics will not be replanted, but Northam A and Geraldton will be observed in 1975. :
Drought Effects On Wheat Cultivars Using Trickle Irrigation, R N. Weir
Drought Effects On Wheat Cultivars Using Trickle Irrigation, R N. Weir
Experimental Summaries - Plant Research
Trial 74M32 - The trial was aimed at - 1. Looking for cultivar differences in drought tolerance: particularly involving Gamenya and Insignia. 2. Considering trickle irrigation as a means of controlled water application. Four cultivars were sown at the end of July in salmon gum soil at Merredin. Drought effects on four wheat cultivars in controlled environment Trial 74GL8 - This work was aimed at assessing the performance of the cultivars Gamenya, Gambee, Darkan and Insignia under controlled moisture stress.
Limnetic Zooplankton Dynamics In Beaver Reservoir Including An Inventory Of Copepod Species And An Evaluation Of Vertical Sampling Methods, Eugene H. Schmitz
Limnetic Zooplankton Dynamics In Beaver Reservoir Including An Inventory Of Copepod Species And An Evaluation Of Vertical Sampling Methods, Eugene H. Schmitz
Technical Reports
There can be little doubt that the development of primary food sources (i.e. plankton) is an important factor contributing to fish production. Applegate and Mullan (1968) report that an exceptional sport fish harvest is generally associated with the development of new reservoirs, although the precise reasons for such interrelations are not known. Kramer and Smith (1962) demonstrated the tendency of bass fingerlings to feed on Cladocera in proportion to the latter's abundance, and Hodson (1966) reported the same basic pattern for largemouth and spotted bass fingerlings in Beaver Reservoir. Applegate and Mullan (1969) analyzed the digestive tract contents of larval …
The Role Of Orthoporus Ornatus Millipedes In A Desert Ecosystem, C. S. Crawford
The Role Of Orthoporus Ornatus Millipedes In A Desert Ecosystem, C. S. Crawford
Memorandum
No abstract provided.
Curlew Valley Validation Site Report, R.S. Shinn, R.D. Anderson, M. Merritt, W. Osborne, J.A. Macmahon
Curlew Valley Validation Site Report, R.S. Shinn, R.D. Anderson, M. Merritt, W. Osborne, J.A. Macmahon
Memorandum
No abstract provided.
Demography And Role Of Herbivorous Ants In A Desert Ecosystem As Functions Of Vegetation, Soil And Climate Variables, Walter G. Whitford, Carol Ann Kay
Demography And Role Of Herbivorous Ants In A Desert Ecosystem As Functions Of Vegetation, Soil And Climate Variables, Walter G. Whitford, Carol Ann Kay
Memorandum
No abstract provided.
Demographic Studies Of Sagebrush Insects As Functions Of Various Environmental Factors, Ting H. Hsiao, Thomas W. Green
Demographic Studies Of Sagebrush Insects As Functions Of Various Environmental Factors, Ting H. Hsiao, Thomas W. Green
Memorandum
No abstract provided.
Plant Productivity And Nutrient Interrelationships Of Perennials In The Mohave Desert, S. A. Bamberg, A. Wallace, G. E. Kleinkopf, A. Vollmer, B. S. Ausmus
Plant Productivity And Nutrient Interrelationships Of Perennials In The Mohave Desert, S. A. Bamberg, A. Wallace, G. E. Kleinkopf, A. Vollmer, B. S. Ausmus
Memorandum
No abstract provided.
Biology Of Nematodes In Desert Ecosystems, D. W. Freckman, S. A. Sher, R. Mankau
Biology Of Nematodes In Desert Ecosystems, D. W. Freckman, S. A. Sher, R. Mankau
Memorandum
No abstract provided.
Gaseous Losses Of Nitrogen From The Soil Of Semi-Arid Regions, T. C. Tucker, R. L. Westerman
Gaseous Losses Of Nitrogen From The Soil Of Semi-Arid Regions, T. C. Tucker, R. L. Westerman
Memorandum
No abstract provided.
A Nitrogen Submodel, H. Parnas, J. Radford
The Role Of Algae In Crust Formation And Nitrogen Cycling In Desert Soils, R. I. Lynn, M. C. Vogelsberg
The Role Of Algae In Crust Formation And Nitrogen Cycling In Desert Soils, R. I. Lynn, M. C. Vogelsberg
Memorandum
No abstract provided.
Some Pseudoscorpions Of Curlew Valley, George F. Knowlton
Some Pseudoscorpions Of Curlew Valley, George F. Knowlton
Memorandum
No abstract provided.
Management And Administration, Frederic H. Wagner