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Articles 1 - 30 of 33
Full-Text Articles in Life Sciences
Organic Compounds In Surface Sediments And Oyster Tissues From The Chesapeake Bay, R. H. Bieri, P. O. Dufur, R. J. Huggett, W. Macintyre, P. Shou, C. L. Smith, C. W. Su
Organic Compounds In Surface Sediments And Oyster Tissues From The Chesapeake Bay, R. H. Bieri, P. O. Dufur, R. J. Huggett, W. Macintyre, P. Shou, C. L. Smith, C. W. Su
Reports
This report contains three parts. In Part I, the methodology to extract and analyze sediment and oyster tissue samples from the Chesapeake Bay is described in detail. Remaining problems are clearly identified. Part II contains the results and their discussion. Part III contains a number of appendices with detailed data. For those readers interested in still more detail, the complete bank of processed data is on computer tapes at this institute and at the Environmental Protection Agency-Chesapeake Bay Program office at Annapolis, Maryland. Also included in Part III we give the results of volatile halogenated organic compounds determined in water …
Loose Smut Of Barley. Sub-Clover Root Rot. Rapeseed Diseases., M. J. Barbetti
Loose Smut Of Barley. Sub-Clover Root Rot. Rapeseed Diseases., M. J. Barbetti
Experimental Summaries - Plant Research
Loose smut of barley. Fungicidal control of loose smut in barley – 81MT31, 81NA29. Sub-clover root rot. Fungicidal control of pythium sp – 81AL37, 81BU3. Rapeseed diseases. 1. Rapeseed varieties/Lancelin blackleg strain – 81MO24. 2. Rapeseed varieties/Sclerotinia disease – 81MT32. 3. White leaf spot and grey stem of rapeseed – 81MT33.
Sulphur Nutrition Of Pastures And Crops, Phosphorus And Potassium Nutrition Of High Rainfall Pastures On Deep Sands, Soil Acidity - High Rainfall Pastures, J S. Yeates, M F. Clarke
Sulphur Nutrition Of Pastures And Crops, Phosphorus And Potassium Nutrition Of High Rainfall Pastures On Deep Sands, Soil Acidity - High Rainfall Pastures, J S. Yeates, M F. Clarke
Experimental Summaries - Plant Research
A. SULPHUR - HIGH RAINFALL 1. Rates and time of application of superphosphate to pastures. 79AK2, 79AL23, 79AL25, 79AL41, 81BY1, 81KE1. 2. Sulphur soil test calibration on pastures. 79AL18, 80BY2, 80KE2. 3. Sulphur soil test calibration on pastures: Co-operative PKS soil test project on pastures on duplex soils of the east Albany area (PRD/ARO). Sulphur results. 80 AL44, 46, 47, 48, 72, 73 81AL51, 53, 55 4. Sulphur on adsorbing soils receiving no current S input. 80BY1., 80AL16. 5. Sources, rates, time of application of sulphur on pastures. 80AL1, 80AL4, 81AL3, 81AL4, 80KE1, 80MA1 B. SULPHUR - LOW RAINFALL 1. …
Aerial Spraying Trial., G A. Pearce
Aerial Spraying Trial., G A. Pearce
Experimental Summaries - Plant Research
Conclusions 1. The volume of application with water affected the results obtained. The visual results of Treatment 1 suggested it was not an acceptable commercial result and the plant counts support this conclusion. Treatments 2 and 3 looked very similar and were very similar and were very acceptable results. 2. The height of spraying affected the results in that where the plane had to start climbing to pass over trees, the effectiveness dropped off. 3. Spray drift could be a problem because of the risk of causing damage to trees and native vegetation. Severe damage was seen on trees at …
Grain Legume Agronomy Programme, G Walton
Grain Legume Agronomy Programme, G Walton
Experimental Summaries - Plant Research
Lupin agronomy, series 1 - growth factor interactions. To evaluate the relative influence that various growth factors exert on crop yield. Lupin agronomy, series 2 - harvest index response to density. To establish whether the harvest index of the plants at maximum crop yield density remains constant over a range of environmental conditions and whether differences exist between cultivars. Lupin agronomy - nutrition. To compare the grain yield response to potash rates. Grain legumes for wheatbelt rotations. To compare the soil fertility after one year growth of different legume species. In the 1981 experiments, Derrimut field pea yielded well, outyielding …
Pasture Trials At Esperance, M Da Bolland
Pasture Trials At Esperance, M Da Bolland
Experimental Summaries - Plant Research
Introduction. Most of the 1981 data viz seed yield results, and hardseed data, has not yet been completely processed, and thus only some of the data can be presented in this summary. Section i: Medic species trials – 80SG39, 80SG23, 80SG24, 80ES65(a), 80ES21 (a). Section ii: Lucerne variety trials – 81ES28, 81ES25, 81ES29, 81ES30, 81ES31.
Phosphorus Sources Trials. Miscellaneous Trials., J. W. Bowden, R J. Lunt, M J. Baker
Phosphorus Sources Trials. Miscellaneous Trials., J. W. Bowden, R J. Lunt, M J. Baker
Experimental Summaries - Plant Research
I Sources of PhosphorusTrials - 1981 results. Pasture Trials. 76MT10 - New land pasture at Mt Barker - gravel. 77MT1 - New land pasture at Mt Barker - gravel Methods and particle size effects. 76BU1 - New land pasture at Yallingup - sand over gravel. Cropped to oats 1981. Cropping Trials. 76WH10 - Young land at Wongan Hills - ley year: W.L.S. 76WH9 - New land at Wongan Hills - W.L.S. 76N4 - New land at Newdegate - shallow gravel. 76LG6 - Young land at Newdegate - sandy gravel. 80BA6 - Young land at Badgingarra - pale, deep sand. Trials …
Legume Seed Inoculation, D. L. Chatel
Legume Seed Inoculation, D. L. Chatel
Experimental Summaries - Plant Research
Medic inoculation experiments – 81ME6, 81GE5. Inoculation trials were conducted at Holleton (81ME6) and Canna (81GE5).The major objectives were: 1. To test the field effectiveness of new strains of Rhizobium meliloti and to compare them with standard strains. 2. To initiate trials aimed at examining the performance of R. meliloti as long term colonisers of mildly acid soils. These trials are the first in a programme aimed at looking at the feasibility of developing acid tolerant strains for large areas of acid soil which are not suitable for growing subterranean clover. The 1981 trials will provide a basis for comparison …
Doublegee Seed Dormancy. Lupins -Weed Control,Herbicides, New Products, D J. Gilbey
Doublegee Seed Dormancy. Lupins -Weed Control,Herbicides, New Products, D J. Gilbey
Experimental Summaries - Plant Research
Doublegee seed longevity x depth - 75WH66, 76C9, 76KA8. Grass control in dry sown lupins – 81A46, 81GE21, 81TS33. Broadleaf weed control in dry sown lupins – 81TS34, 81A47. Early post-emergence weed control – 81GE20. Early post-emergence weed control - lupins - 81TS32, 81A45. Post-emergence grass control in lupins. Post-emergence grass control in lupins None of the mixtures of Barban with Hoegrass and Matavin controlled the main target, Bromegrass. No significant differences due to treatments were detected in grain yields except at Avondale where annual ryegrass was the main grass weed which was controlled readily by the Hoegrass treatments as …
Development Of Bioassay Techniques/ Field Persistence Of Trifluralin, Simazine And Diuron. Calotropis Procers And Parkinsonia Aculeata., A H. Cheam
Experimental Summaries - Plant Research
1. Development of bioassay techniques for trifluralin, simazine and diuron. 2. Field persistence of trifluralin, simazine and diuron in Wongan Hills soils. 3. Taxonomic studies of Calotropis procera, a declared weed of the North-West of Western Australia. 4. Germination studies of calotropis procera and Parkinsonia aculeata.
Kabatiella Caulivor, Root Rot Resistance, Bluegreen Aphid, Asessment Of Medicago Murex, Clover Establishment Techniques, D J. Gillespie
Kabatiella Caulivor, Root Rot Resistance, Bluegreen Aphid, Asessment Of Medicago Murex, Clover Establishment Techniques, D J. Gillespie
Experimental Summaries - Plant Research
Kabatiella caulivora (clover scorch). In contrast to previous years where all overseas introductions and most crossbreds were tested for resistance to Kabatiella, only selected clovers are now being screened so as to reduce the number requiring testing to a manageable size. Root rot resistance screening. One hundred and seven clovers selected as low in formononetin, tolerant of clover scorch, mid to late season maturity, and reasonable winter vigour were tested at two sites for root rot resistance. Bluegreen aphid (BGA) resistance screening. Sub clover screening for bluegreen aphid resistance ranked from tolerant to susceptible (ratings at 49 days from commencement). …
1981 Trace Element Nutrition, J. W. Gartrell, R F. Brennan
1981 Trace Element Nutrition, J. W. Gartrell, R F. Brennan
Experimental Summaries - Plant Research
1. Long term copper trial - Newdegate Research Station - 66N14. 2. Zinc residual with OAP for wheat - 80NO31. 3. Zinc residual with OAP for wheat - 79ME22. 4. Zinc residual with OAP for wheat - 79ME23. 5. Zinc, sulphur and copper residual with OAP for wheat - 79WH66. 6. Wheat response to zinc rates - 81MO8. 7. Manganese on wheat and oats - 81KA29. 8. Molybdenum and ammonium sulphate (S/A) on wheat - 81NO40. 9. Molybdenum and ammonium sulphate on wheat - 81NO41. 10. Molybdenum and ammonium sulphate on wheat - 81NO39. 11. Mo, lime, Mg on sub. …
Minimum Tillage, Stubble Management, Deep Ripping, Newland Clearing, Residual Chemicals, R J. Jarvis
Minimum Tillage, Stubble Management, Deep Ripping, Newland Clearing, Residual Chemicals, R J. Jarvis
Experimental Summaries - Plant Research
A/ Long term Minimum Tillage Investigations (i) Continuous Cropping Sites - 77A16, 77WH17, 77M13, 78M25, 77E18, 77MT15, 78BA42 (ii) Rotational Sites - 77A43, 77WH88, 77M56, 77E52, 77MT51. B/ Minimum Tillage Investigations Including - Time of seeding Cultivars and varieties. Depth of cultivation. Depth of seeding. Nitrogen rates - 81WH8, 81N5, 81NA31, 81NA32, 81WH3, 81A2, 81M45, 81M46, 81GE24, 81N29, 81NA40, 81M24, 81M25, 81MO10, 81MO11, 81MO12. C/ Stubble Management Techniques - 79WH6, 79M7. Stubble Trials by Other Researchers - 78WH3, 78C3, 78M2, 81TS36. D/ Deep Ripping - 80A44, 77WH17, 81NO3, 81NO4, 80NO46, 81NA10, 81NA11, 79MO19, 81NO2, 81M45, 81MO39. 81M45, 81M45, 81ES58 ,81ES57, …
Spraytop/Barley Control, Ryegrass Herbicides, Bromegrass Control, J. E. Holmes
Spraytop/Barley Control, Ryegrass Herbicides, Bromegrass Control, J. E. Holmes
Experimental Summaries - Plant Research
Trials reported Spraytop control of bromegrass - 80NO50, 80BA45. Spraytop control of barley grass – 80NA65, 80NO51. Barley grass control - evaluation of Fixaven and Mataven – 81LG40, 81KA44. Pre- and post-emergent application of ryegrass herbicides – 81LG37. Bromegrass control Evaluation of herbicides effect on brome and crop – 81WH52. Evaluation of Glean – 81BA58, 81A53, 81WH51. Evaluation of Dual and Isopoturon – 81A52. Evaluation of Dual and Hoegrass – 80BA59. Screening herbicides for brome control – 81BA57. Evaluation of Glean - 81WH54, 81N27. Tank mixes for minimum tillage – 81M50, 81A56, 81N28, 81NA41. Evaluation of Sencor, Diuron, Trifluralin tank …
Nitrogenous Fertiliser Requirements In Different Cropping Rotations 1981 Results, M G. Mason, I C. Rowland
Nitrogenous Fertiliser Requirements In Different Cropping Rotations 1981 Results, M G. Mason, I C. Rowland
Experimental Summaries - Plant Research
Nitrogen Requirement of Wheat After Clover, Lupins and Cereal – 78C1, 80BA3, 78N1. Nitrogen Requirement of Barley After Clover, Lupins and Non Legume – 78E3. Nitrogen Fertiliser Requirement in Alternate Crop-Pasture Rotation – 78BA1, 78WH2. Nitrogen Fertiliser Requirement in a Lupin - Wheat Rotation – 81LG29.
Rapeseed, Oilseed Phenology, Linseed And Sunflower Trial, A G. Mckay
Rapeseed, Oilseed Phenology, Linseed And Sunflower Trial, A G. Mckay
Experimental Summaries - Plant Research
Nitrogen x time of sowing, two rapeseed varieties – 81AL21, 81BR2. Rapeseed establishment trial – 81AL47. Rapeseed harvesting methods – 81MT48. Shattering differences among rapeseed lines - 81MT49. Estimated pre-treatment pod shattering losses.
Oilseed phenology – 81MT47, 81WH57, 81A48, 81BA53, 81C37, 81E34. Comment: 81C37- severely infested with wild radish - not hqrvested. 81E34- early insect damage - not harvested. 81A48- yield data not available. 81MT47- yield potential of site reduced by waterlogging.
Kerb on rapeseed and linseed – 81GL6.
Sunflower agronomy trial – 80AL89.
Influence Of Planting Systems On Crop Growth And Soil Water Relations., D Tennant
Influence Of Planting Systems On Crop Growth And Soil Water Relations., D Tennant
Experimental Summaries - Plant Research
Summary of experimental results 1981. Influence of planting systems on crop growth and soil water relations. Rainfall infiltration, drainage and water use. Yields. The two late sown treatments of previous years were replaced in 1981 with deep ripping treatments. Details are presented in R. Jarvis' report. 77A16, 77WH17,
Part 1. A. Take-All Of Cereals B. Rhizoctonia C. Pythium Root Rot Of Wheat, Part 2, A. Minimum Tillage Trials., G S. Macnish
Part 1. A. Take-All Of Cereals B. Rhizoctonia C. Pythium Root Rot Of Wheat, Part 2, A. Minimum Tillage Trials., G S. Macnish
Experimental Summaries - Plant Research
Take-all following cleaning crops. Take-all build-up on new land rotation. Take-all build-up and rates of phosphorus on wheat. Long-term rotation and take-all. Take-all incidence in cereal/lupin rotation. Take-all incidence in a wheat/clover or/pasture rotation. Continuous wheat and take-all. Rhizoctonia patch of cereals. Rhizoctonia mapping experiment. Rhizoctonia patch - control. Pythium root rot of wheat. Part 2. Sprayseed followed by direct drilling with triple disc drill. Plough, Sprayseed followed by direct drilling with triple-disc drill. Sprayseed followed by direct drilling with combine. Cult + seed with combine - Sprayseed followed by cultivation followed by drilling with combine. For this report the …
Grass Control In Pastures., C W. Thorn
Grass Control In Pastures., C W. Thorn
Experimental Summaries - Plant Research
Crop Yields after Pasture Manipulation in 1980. Effect of Grass Control on Pasture Production. Effect of Grass Control on Animal Production. Pasture Density Effects and Composition on Soil Nitrogen. The Effect of Kerb (R) on Rapeseed, Linseed and Barley Grass. 80M041, 80M040, 80AB2, 81A23, 81 A188, 81Ba2, 81 N3, 81 N2, 81 A11 81N21, 81Ka1, 81Ka2, 81 Na3, 81NO5, 81MO1
Investigations Of Ryegrass Toxicity., Brian A. Stynes
Investigations Of Ryegrass Toxicity., Brian A. Stynes
Experimental Summaries - Plant Research
81KA47, 81NA47, 81M047, 81KA48, 81NA45, 81M045, 81KA50, 81NA46, 81M046, To monitor the amount of toxin present in galls from the time of first head emergence until maturation of the ryegrass pastures. To relate the onset and development of toxicity to plant growth stages and climatic conditions in the different regions affected by annual ryegrass toxicity. To relate the level of toxicity to pasture density and to the number of galls present in the pasture. As part of the series of experiments done to monitor the amount of toxin present in pasture at a number of sites throughout the seasons, an …
Long Term Rotation Trials., I Rowland.
Long Term Rotation Trials., I Rowland.
Experimental Summaries - Plant Research
Long term rotation trials. 66M29/2083EX, 67Cl3/2332EX , 67N4/2333EX, 68E5/2474EX , 68SG5/2475EX , 73SG16. Lupins: Wheat Rotation. 79GE36/3288EX, 79GE37/3288E, 80TS3/3288EX, 73SG16/3229EX Continuous Cropping with Nitrogenous Fertiliser. 80NA6
Organic Matter As A Source Of Nitrogen., A Reincke
Organic Matter As A Source Of Nitrogen., A Reincke
Experimental Summaries - Plant Research
Contents 1.0 The effects of seeding clover at three rates on three soil types - 81GH1 1.1 Effect on dry matter of tops and roots, and their nitrogen contents. 1.2 Effect on mineral nitrogen, yield and nitrogen uptake. 2.0 The effect of organic matter and time on plant growth - 81GH2 3.0 Seeding rates of clover - 80WH5 3.1 Over summer losses. 3.2 Effect on mineral nitrogen and yield. 4.0 Pasture species/seeding rate trials. 4.1 81GE4 - Dry matter yields and root production. 4.2 81GE2 and 81M04 - Dry matter yields. 5.0 The effect of organic matter, rate of addition, …
The Effect Of Soil Acidity On Crop And Pasture Production., W Porter, R Klemm
The Effect Of Soil Acidity On Crop And Pasture Production., W Porter, R Klemm
Experimental Summaries - Plant Research
SUMMARY The effects of lime and molybdenum applications on wheat and subterranean Clover were studied further. Wheat. In relation to lime use, my aim is to develop soil tests to be used to predict when a soil requires lime to produce maximum yield, and to predict the optimum rate of lime. Using the results from field trials commenced in 1980 and 1981 the soil parameters which may be used to predict lime responses in wheat have been narrowed down. From the relationships between soil data and lime responses it appears that soil ph (measured in 1:5 H20 or 1:5 N …
Experimental Summaries., M W. Perry, R N. Weir
Experimental Summaries., M W. Perry, R N. Weir
Experimental Summaries - Plant Research
Wheat Yield Potential Trials, 81BA4, 81WH7, 81KAS.Wheat-Regenerating Sandplain Lupin Rotation Trials, 79GE38, 79GE42.Nitrogen x Cycocel x Foliar Nutrients x Fungicide-on Wheat,81KA6. Historical Wheat Trials, 81A3, 81C4, 81SG22, 81WH6. Time of Planting on Cereal Yields, 81NA8, 81KA55.
Growth Regulator Trials. Part 1, M W. Perry, R N. Weir
Growth Regulator Trials. Part 1, M W. Perry, R N. Weir
Experimental Summaries - Plant Research
This summary covers 1981 trials on chlormequat plant growth regulant (formulated as Cycocel 750A or Halloween), ECO organic seed dressing and a range of organic foliar sprays. Rates and times of application of chlormequat on wheat. 81A22, 81BA3, 81Cl8, 81E25, 81M22, 81MT2, 81N4, 81SG36, 81WH4. Effects of chlormequat on wheat varieties (S4 trials). 81A6, 81BA7, 81C6, 81E6, 81M9, 81M13, 81MT9, 81N10, 81SG26, 81WH19. Trials comparing organic seed treatments, organic foliar sprays and plant growth regulators. 81WH61, 81LG34, 81LG48, 81ME27a, 81ME276, 81TS39, 81ES51, 81ES52, 81ES53, 81ES54, 81NA57, 81N4A, 81MT2A, 81TS38A. H. McCashney, Cadoux Un-numbered, Newdegate Research Station.
Summary Of Results Of Field Experiments., M L. Poole, A R. Thompson
Summary Of Results Of Field Experiments., M L. Poole, A R. Thompson
Experimental Summaries - Plant Research
The aim of these experiments was to determine the relationship between bromegrass and ryegrass densities and their effects on wheat yields and in one case lupin yield 81 BA 45, Competition between bromegrass, ryegrass and wheat. 81 KA 28, Competition between bromegrass, ryegrass and wheat. 81 ME 35, Competition between bromegrass, ryegrass and wheat 81 TS 28, Competition between bromegrass, ryegrass and wheat. 81 WH 48, Competition between bromegrass, ryegrass and wheat. 81 NA 30, Competition between bromegrass, ryegrass and wheat. 81 MT 42, Abandoned due to severe waterlogging and disease. The wheat failed. The weeds grew magnificently. 81 MO …
The Effect Of Chemical Grass Control In Pastures On Subsequent Crop Production And Take All Levels, C W. Thorn
The Effect Of Chemical Grass Control In Pastures On Subsequent Crop Production And Take All Levels, C W. Thorn
Experimental Summaries - Plant Research
To evaluate the effect of chemical grass control, 82LG25.
Introduction. Methods. General notes on the trials. Results and discussion. Conclusions.
The Design Of Oxygen Rebreather Equipment For Use In Foul-Air Speleology, Donald A. Mcfarlane
The Design Of Oxygen Rebreather Equipment For Use In Foul-Air Speleology, Donald A. Mcfarlane
WM Keck Science Faculty Papers
The design of a lightweight oxygen rebreather set suitable for short duration explorations in foul-air caves is described, together with a discussion of its performance, limitations, and possible improvement.
Sediment Mixing By Invertebrates As Shown By 85kr1, Dexter S. Haven, Reinaldo Morales-Alamo, John N. Krauter
Sediment Mixing By Invertebrates As Shown By 85kr1, Dexter S. Haven, Reinaldo Morales-Alamo, John N. Krauter
Reports
In the event radionuclides are accidentally introduced into an estuary, many isotopes would become adsorbed on suspended particles of clay or silt; others would be incorporated into living cellular material (Caritt and Goodgal, 1954; Rice and Willis, 1959). Oysters and other filter feeders in these estuaries are capable of filtering from suspension large quantities of the suspended solids, as well as the larger living cellular material (Haven and Morales-Alamo, 1966a). Ingested material along with the associated radionuclides would be voided as compacted fecal strings or pellets (biodeposits). Many of these fecal pellets may be alternately suspended in the water mass …
An Animal-Sediment Study In The Lower York River : February 1965 To February 1966, Dexter S. Haven, John N. Kraeuter, Richarad C. Krauter, Reinaldo Morales-Alamo
An Animal-Sediment Study In The Lower York River : February 1965 To February 1966, Dexter S. Haven, John N. Kraeuter, Richarad C. Krauter, Reinaldo Morales-Alamo
Reports
Certain invertebrates are more efficient than others in filtering solids from suspension. An equal degree of variability exists among benthic invertebrates in their ability to mix biodeposits into subsurface sediments. As a result of these differences, the degree to which suspended particulate matter and associated contaminants may be deposited or mixed into sediments may in part depend on the species present, which in turn may be dependent on sediment type. A number of investigators have examined the relation between benthic animal communities and their limiting physical factors (Smith, 1932; Mare, 1942; Dexter, 1947; Holm, 1949; Stic~1ey and Stringer, 1957; Sanders, …