Fresh Water Studies Commons^™

Residual Value Of Legumes., J. Hamblin, R. Delane, G. Adam, A Bishop

Experimental Summaries - Plant Research

This report examines the residual value of lupins and several other species grown at ECRS in 1984 on the yield of wheat in 1985 (85 C 25). 85 C 46 examined the residual effect of several lupin species and varieties grown under different nutritional treatments in 1984 at two sites differing in rainfall on wheat yields in 1985. 85 C 47 examines the interaction between levels of applied potassium and deep cultivation (ripping) on the yield of wheat at a low K, dry site.

Report on 85 C 27, 85 C 46 and 85 C 47.

Pasture Research Programme For The Medium Rainfall Zone Of W.A. Species Selection And Management Related In Particular To The Ryegrass Toxicity Problem (Fund 492/0035)., C. K. Revell, C. W. Thorn

Experimental Summaries - Plant Research

Species evaluation, 85KA69, 85 KA 70, 85 KA 94, 85 KA 68. Small plot evaluation, 85 KA 89, 8S KA 90. Long term medic species evaluation, 82 KA 44, 82 KA 45. Drill run evaluation of M. polymorpha, 84 KA 38, 84 KA 39, 84 KA 40. Species characterization trials, 83 KA 66, 83 KA 67. Serradella evaluation, 85 KA 72, 85 KA 73, 85 KA 74, 85 KA 76

Organic Source Of Nitrogen Trials & Miscellaneous Trials., J. W. Bowden, A. Diggle, R. J. Lunt

Experimental Summaries - Plant Research

1. Nitrogen sources Badgingarra 85BA3 Organic Source of Nitrogen 8SBA4 Interaction of Organic and Inorganic Nitrogen sources 85BAS Miscellaneous Organic Nitrogen Sources 85BA39 Times and Levels of Inorganic Nitrogen Application Lancelin 85M02 Organic sources of nitrogen 85M03 Interaction of Organic and Inorganic Nitrogen Sources 85M04 Miscellaneous Organic Nitrogen Sources 85MOS3 Times and Levels of Inorganic Nitrogen Application Meckering 85N01 Organic Sources of Nitrogen 85N03 Miscellaneous Organic Nitrogen Sources 85NOS9 Times and Levels of Inorganic Nitrogen Application 2. Miscellaneous trials 84M6 Rates of Nitrogen on Wheat - CSIRO Megatrial (E. Harvey) 85M4 Nitrogen and Water on Wheat (with M. Mason) 83WH29 …

Weed Seed Ecology., A. H. Cheam

Experimental Summaries - Plant Research

Emergence of weed seedlings from different soil depths. 82MT49, Mt Barker Research Station. 83MT4, Mt Barker Research Station. 82NR12, Northam Research Station. 83NR2, Northam Research Station. 82C37, Chapman Research Station. 83C3, Chapman Research Station. Longevity of buried weed seeds. 82MT50, Mt Barker Research Station. 83MT5, Mt Barker Research Station. 82NR13, Northam Research Station. 83NR3, Northam Research Station. 82C38, Chapman Research Station. 83C4, Chapman Research Station. Emergence of weed seedlings in relation to soil type and cultivation. 82PE32, South Perth. Emergence and fate of weed seeds in different depths of cultivated and undisturbed compacted soil. 84C49, Chapman Research Station. 84MT62, Mt …

Low Rainfall Pasture Project., M. A. Ewing

Experimental Summaries - Plant Research

Variety experiments, rows 85M53, small plots 85M54, large plots, 85M43, 85N21, 85ME49, 85M44. defoliation comparison, 85M41. Pasture establishment systems, 85N25, 85N26, 85M52, 85M45, 85M46, 85M47, 85ME61, 85M62, 85M63. Cereals following pastures, 84M42, 84M43, 84M56, 84M57, 84LG34. Pasture wheat rotation, 82WH39, 82M47.

Long Term Rotation Trials, Lupins: Wheat Rotation., I. Rowland, W. Hawkins

Experimental Summaries - Plant Research

Long term rotation trials 66M29, 67C13, 67N4, 68E5, 65SG5, 73SG16, Lupins : wheat rotation 80TS3, 82TS2, 82M26.

Soil Acidity - High Rainfall Pastures., J. S. Yeates, M. F. Clarke, D. A. Tooke, R. A. Deyl

Experimental Summaries - Plant Research

Aims of the Project (i) To establish the current pH of the cultivated soils of the high rainfall areas of south-west Western Australia, and the extent to which pH has altered since clearing. (ii) To examine the responsiveness of old land pastures with low current soil pH levels (< 5.5 water) to applied lime. (iii) To relate the responsiveness of subterranean clover-based pastures to measured soil parameters. 80BU14, 81AL10, 81AL12, 81BU18, 81BY18, 81BY25, 81BY26, 82AL4, 82AL5, 82AL55, 82BU7, 82HA35, 82HA36, 82PE1, 82MA20, 83AL7, 83AL9, 83AL10, 83ALll, 83BY29, 84BU9, 84BU10, 84BY37, 84HA21, 84HA37, 84MA21.

Effect Of Soil Type On Relative Crop Yields, Effect Of Seeding Time On Pea And Lupin Yields, Effect Of Seeding Rate On Field Pea Yields, Studies In Legume Nodulation And Response Of Cereals In The Year Following Legumes., R. French

Experimental Summaries - Plant Research

Trials 85M36, 85M37, 85M38, 85M39. Trials 8SJE17, 85KA62, 85N20, 85ME42, 85ME43, 85ME44, 85WH48. Trials 85KA63, 85M33. Trials 85M32, 85M34, 85M35. Trials 84M50, 84M51, 84M52.

Long Term Minimum Tillage Investigations, Stubble Management Techniques, Deep Ripping And Seeding Machine Comparisons., R. J. Jarvis, L. G. Butcher, L. D.J. Smith

Experimental Summaries - Plant Research

77 A 16, red/brown sandy loam. 77 WH 17, yellow clayey-sand (Wongan loamy sand). 77 M 13, red sandy clay loam (salmon gum, gimlet). 78 M 25, Yellow acid loamy sand (Wodgil). 77 Mt 15 Gravelly loamy sand/sandy loam - forest soil 77 E 18, fine white sand over fine sandy clay. 77 A 43, Brown loamy sand/sandy loam - Jam country.77 WH 88, Grey loamy sand over gravel at 50 cm - Elphin soil series – Mallee. 77 M 56, Red sandy clay loam - Salmon Gum, Gimlet. 82 M 35, Loamy sand/sandy loam – Mallee. 77 E 52, …

Stubble Retention Effects On Soil Water Storage And Yield., D. Tennant

Experimental Summaries - Plant Research

Merredin Research Station on red brown earth soil type, 84M1, 84M5. Summer data. Winter data.

Farm Systems Research Involving New Pasture Species., C. W. Thorn, C. K. Revell

Experimental Summaries - Plant Research

The effect of grazing on Circle Valley medic production. Effect of rotations on M. polyrnorpha production and persistence and cereal crop yields, 84 KA 35, 85 LG 44, 84 KA 37 Effect of tillage x gypsum x nitrogen on continuous cereal production, 84 KA 28. Effect of gypsum x seeding rate on the seed yield of three pasture legumes. Pasture species tolerance to grass and broadleaf herbicides. Undersowing cereal crops with burr medic.

Grain Legume Agronomy Programme., G. H. Walton

Experimental Summaries - Plant Research

Lupin agronomy, 85AL4, 85AL6, 85M05, 85PE13, 81M029, 81M030, 81M027. Grain legume crop comparisons, 85LG23, 85LG24, 85LG25, 85E23, 85GE28, 85C71, 85ME35, 85KA7, 85E2, 85N5, 85N04, 85SG2, 85E34, 85LG38, 85LG40, 85MN2, 85MD25, 85MN1.

Agronomy Of Oat Varieties., W. K. Anderson

Experimental Summaries - Plant Research

Nitrogen rates x oat varieties, 85MT47. Seed rates x oat varieties, 85MT48. Time-of-sowing x oat varieties, 85MT49. Applied Phenology in crop variety testing, 85WH5, 85N4.

Barley Agronomy., K. J. Young, B. R. Wylde, B. Raszyk, T. N. Khan

Experimental Summaries - Plant Research

Barley foliar diseases, effect on nitrogen response, 85ES25, 85E24, 85E25, 85MT37, 85ES29, 85MT38, 85E26, 85ES32, 85ES31, 85ES30, 85ES26, 85ES24, 85ES27, 85ES28, 85ES34, 85M27, 85SG27, 85MT42, 85C70,

Low Tillering Cereals, Early Maturity Of Cereals, Cereal Variety And Reduced Branching Lupins., R. Delane, J. Hamblin

Experimental Summaries - Plant Research

Trial 85C62 - growth and water use of low tillering cereals. Trial 85C62 - yield potential of low tillering cereals. Trial WEUNI - response of low tillering breeding lines and standard varieties to sowing rate. Trial 85C45 - effect of flowering date, seeding rate, deep tillage and applied nitrogen on yield of barley. Trial 85C61 - wheat variety x management interaction on sandplain. Trial 85C55 - growth and water use of reduced branching lupins. Trial 85C56 - normal and reduced branching lupins - planting density response.

Benthic Diatom Community Dynamics In The Colorado River: Interactive Effects Of Periodic Dessication And Current Regime, Christopher Gerard Peterson

Publications (WR)

The response to periodic desiccation of periphyton communities developed in eddy environments or in areas exposed to variable, direct current was examined. Algal communities were incubated on clay tiles for between 2 and 12 weeks in the Colorado River, directly below Hoover Dam from October, 1983 - January, 1984. Mean daily discharge from the dam decreased over this period. To assess the influence of these discharge changes on community dynamics, samples collected over the first 12 weeks of the investigation were compared to samples of the same age collected over the final 8 weeks.

The small diatom taxon Achnahthes spp …

A Proposal To Fertilize The Overton Arm And Gregg Basin Areas Of Lake Mead, Larry J. Paulson

Publications (WR)

Several limnological studies have been conducted in Lake Mead during the past decade. The recent studies clearly show that most of Lake Mead is deficient in nutrients, especially phosphorus, and very low in productivity. The reservoir-wide average total phosphorus concentration for 1981 - 1982 was only 9 mg/m³. This is below levels found In most oligotrophic lakes and reservoirs. Algal biomass, as measured by chlorophyll-a, averaged only 1.5 mg/m³. That also places Lake Mead in the oligotrophic range. Transparency, as measured by a Secchi disc, averaged 9-5 m in Lake Mead during 1981-1982. That far exceeds …

Seasonal And Spatial Heterogeneity In The Limnetic Zooplankton Community Of Lake Mead, Gene Robert Wilde

Publications (WR)

Zooplankton samples collected from throughout Lake Mead, in 1981-1982, demonstrate the presence of a statistically significant seasonal and spatial heterogeneity in zooplankton densities. Seasonally, the major zooplankton groups were most abundant in the spring and fall, coincident with maxima in chlorophyll-a concentrations. Successions among the various rotifers, cladocerans and copepods present in the reservoir were influenced by food availability, diapause, predation by planktivorous fish and, possibly, water temperatures. Spatial heterogeneity in zooplankton densities was unrelated to water temperature, pH, conductivity and dissolved oxygen concentrations, but was related to the abundance of phytoplankton (chlorophyll-a concentrations) and fish. Statistical analyses indicate that …

Phytoplankton Ecology And Dynamics In The James River Estuary Virginia, U. S. A., Margaret J. Filardo

OES Theses and Dissertations

Autotrophic biomass and productivity as well as nutrient distributions and phytoplankton cell populations in the James River estuary, Virginia, from Newport News Shipyard to the 0 o/oo isohaline, were sampled on a monthly basis from August of 1981 to December of 1982. Particular emphasis was placed on the very low salinity region (defined as the location where surface salinity measured between 0.0 and 0.75 o/oo based on conductivity) in order to determine the fate of fresh water phytoplankters upon being advected into the estuary because of their suspected role in the biogeochemical cycling that occurs there.

Both chlorophyll a and …

Las Vegas Wash Multispectral Scanner Survey, T. H. Mace, M. V. Olsen, Environmental Protection Agency

Publications (WR)

At the request of the U.S. Bureau of Reclamation, Boulder City, Nevada, the U.S. Environmental Protection Agency's Environmental Monitoring Systems Laboratory at Las Vegas collected multispectral scanner imagery of Las Vegas Wash on October 1, 1982. A combined maximum likelihood classification and editing procedure was used to classify the multispectral scanner imagery into 12 categories of land cover. The classification identified four categories of marsh vegetation, one category of riparian, two categories of mixed scrub, and two desert categories. Turbid water and cultivated land formed an "other" category. Area tabulations were formed by georeferencing the classification to the Universal Transverse …

Pasture Research Programme For The Medium Rainfall Zone Of Wa, C K. Revell, C W. Thorn

Experimental Summaries - Plant Research

Field Assistants: I.R. Rose S.P. Davis Soil Analysis: I.A. Pritchard. A. Screening trials M. polymorpha var brevispina. M. truncatula. T. cherleri - 84KA41, 84KA42, 84KA43, 84KA47. B. Large scale M. polymorpha evaluation - 84KA38, 84KA39, 84KA40, C. Long term Medic species evaluation - 82KA44, 82KA45. D. Species characterization trials - 83KA66, 83KA67. E. M. murex evaluation - 83KA45. F. Dwalganup replacement subclovers - 83KA69. Since 1981, the major emphasis of the Katanning pasture programme has been to select pasture species suitable for replacing ryegrass on soils where Annual Ryegrass Toxicity (ARGT) has been a major problem. These soils have traditionally …

Sulphur Nutrition Of Pastures. Potassium Nutrition Of High Rainfall Pastures On Deep Sands, J. S. Yeates, M. F. Clarke

Experimental Summaries - Plant Research

A. Sulphur - High Rainfall. 1. Sources, rates, time of application of sulphur to pastures - 80AL1, 80AL4, 80AL48. 2. Sulphur nutrition of pastures - 83PE36. 3. S sources and rates on sandy soils of the high rainfall areas - 84HA20, 84HA27. 4. Maintenance of S on pastures on sandy soils - 84AL35, 84HA19, B4HA26. B. Sulphur - Low Rainfall. 1. Sulphur on pastures - 82AL9, 82KA4. C. Potassium. 1. Sources, rates, time of application of potassium on high rainfall deep sand pastures - 80AL6.

Lupin Growth And Water Use; Wheat, Barley, Pea, Rob Delane, J. Hamblin, A Bishop Ms

Experimental Summaries - Plant Research

84C16/84C17 Lupin Growth and Water Use. 84C19 Effect of Density and Nitrogen on Growth and Yield of Uniculm and Tillering Wheat. 84C20 Maturity, Nitrogen and Density Effects of Barley. 84C21 Wheat Variety Trial. 84C18/23/28/33 Pea Research in the Geraldton Region. 84C32 Effect of Terra Sorb on Wheat Yield.

Phosphorus Nutrition Of High Rainfall Pastures - Peel Harvey Estuarine System Study, J S. Yeates, D M. Deeley, M. F. Clarke, R A. Deyl, G. Cockerton

Experimental Summaries - Plant Research

1. Field experiments. A. Sources, rates, time of application of phosphorous on high rainfall Pastures - 80AL2, 80ALS, 81AL5, 81AL6, 81KE2, 81MA4, 82AL10, 82HA31, 82HA32, 83HA26, 83HA27. B. Soil test calibration curve trials. 82HA20, 82HA26, 82HA29, 83HA20, 83HA21, 83HA22, 83HA23, 83HA24, 83HA25. C. P sources and rates on sandy soils of the high rainfall areas - 84AL33, 84AL34, 84HA18, 84HA25. D.Maintenance P trials - 84AL32, 84HA17, 84HA24, 84HA28. 2.Glasshouse Experiments. 84GL5 - 1. Phosphorus sources on subterranean clover on sandy soils. 2. Soil test calibration experiment.

Lupins Wheat Rotation Long Term Rotation Trials, I Rowland, W Hawkins

Experimental Summaries - Plant Research

Long term rotation trials - 66M29, 67Cl3, 67N4, 68E5, 68SG5, 73SG16.

Lupins Wheat Rotation - 80TS3, 82TS2, 82M26.

Ecology Of Skeleton Weed (Chondrilla Juncea) In Western Australia, F D. Panetta

Experimental Summaries - Plant Research

For the first time a laboratory for conducting this type of research has been established in South Perth, and it has been possible to type plants from mature leaf material. This obviates the necessity of waiting for plants to seed to be able to identify them. A total of six new collections were identified as belonging to either the broad-leaf or narrow-leaf forms, the locations for which are given in Table l.l..

Seed viability. To determine the amounts, viability and dormancy status of seeds produced by field-grown plants during summer and autumn months. Time course of seed production by field-grown …

Foliar Disease Of Wheat, A. G. P. Brown

Experimental Summaries - Plant Research

Wheat leaf diseases were at much reduced levels in 1984. This may have been caused by prolonged summer rain prematurely setting off dispersal of spores and also initiating microbiological breakdown of stubble residues. No survey was carried out in 1984 but a good indication of the seasonal effect can be gained by noting that in the spray-timing experiment at Badgingarra disease levels were extremely low until the end of August some 90 days after sowing. Timing of fungicide for Septoria and Yellow Spot control. 84BA32, 84GE59. Effect of Yellow-spot at Merredin (with S. Trevenen) 84ME57. Yellow-spot is common though not …

Water Use Of Alternative Wheatbelt Crop Species, A P. Hamblin, M W. Perry, D Tennant, Neil C. Turner Dr

Experimental Summaries - Plant Research

84M5, 84M6, 84M7. Location: Merredin Research Station Merredin, Western Australia. Three experiments were conducted to measure the productivity and water use of alternative wheatbelt crop species on contrasting soil types in a dry mediterranean environment. Crop species investigated were wheat, barley, cereal rye, narrow leafed lupin and field pea. These were grown on three contrasting soil types, a red-brown earth, a sandy loam over clay and a deep loamy sand; all soils occurring within close proximity to each other. Detailed measurements were made of meteorological conditions, dry matter production, leaf area, root growth, soil water profiles, light interception and plant …

Molybdenum Nutrition, M M. Riley

Experimental Summaries - Plant Research

Field trials. 1. Residual value of Molybdenum on an acid soil - 81NO40. 2. Residual value of Molybdenum on an acid soil - 81M2. 3. Residual value of Molybdenum on an acid soil - 81LG12. 4. Residual value of Molybdenum on an acid soil - 83ME82. 5. Residual value of Molybdenum on and acid soil - 82NO7. 6. Residual values of different Molybdenum sources - 84ME10. 7. Residual values of different Molybdenum sources - 84GE49. 8. Molybdenum requirements of wheat and lupins - 83ME10. 9. Molybdenum requirements of wheat, triticale and lupins - 84ME8. 10. Forms and rates of soil …