Open Access. Powered by Scholars. Published by Universities.®
- Institution
- Keyword
Articles 1 - 30 of 36
Full-Text Articles in Fresh Water Studies
Assessment Of The Effects Of Household Chemicals Upon Individual Septic Tank Performances, Mark A. Gross
Assessment Of The Effects Of Household Chemicals Upon Individual Septic Tank Performances, Mark A. Gross
Technical Reports
A laboratory study and a field study were performed to determine the amounts of specific household chemicals required to destroy bacteria populations in individual domestic septic tanks. The particular chemicals evaluated include liquid chlorine bleach, High Test Hypochlorite (HTH), Lysol disinfectant and Drano crystal. The laboratory study was performed to determine the approximate chemical concentrations to destroy the bacteria in the septic tank, and the field study showed the actual effect of the chemicals upon the bacteria in terms of reduction of the number of bacteria in the septic tank as well as the time required for the bacterial population …
Estimating Potential Ground And Surface Water Pollution From Land Application Of Poultry Litter, J. T. Gilmour, D. C. Wolf, P. M. Gale
Estimating Potential Ground And Surface Water Pollution From Land Application Of Poultry Litter, J. T. Gilmour, D. C. Wolf, P. M. Gale
Technical Reports
In 1985, more than 750 million broiler chickens were produced in Arkansas. During the same year over 15 million laying chickens produced 3.6 million eggs. The waste products of these agricultural production systems, poultry litter and manure, were about 1 million metric tons. As a result of land application of these wastes, about 5,000 metric tons of annnonium N and 12,000 metric tons of mineralized nitrogen were applied to Arkansas pastures in 1985. Manures contributed about 2-3 percent of the total. The objective of this research was to quantify major components of the nitrogen cycle which influence the ground and …
Depth-Controlled Modified Combine For Direct Drilling And Lupin Row Spacing., R. Belford, G Reithmuller
Depth-Controlled Modified Combine For Direct Drilling And Lupin Row Spacing., R. Belford, G Reithmuller
Experimental Summaries - Plant Research
Trial 87WH52, (86M56)
Depth-controlled modified combine for direct drilling.
To compare soil penetration resistance, crop growth, water use, nutrient uptake and root development of wheat 1) sown after scarifying; 2) direct drilled with a combine; 3) direct drilled with the depth-controlled modified combine with loosening ties at 5, 9 or 13 cm; or 4) sown after deep ripping with an Agrowplow to 13 or 30 cm.
Trial 87M82
Location: Merredin Research Station paddock T6 south.
Lupin row spacing
Rapeseed, Tillage., J. D. Warren, Brenda Shackley
Rapeseed, Tillage., J. D. Warren, Brenda Shackley
Experimental Summaries - Plant Research
1. Rapeseed. Assessment of Early Maturing Brassica napus Lines 87KA74, 87LG42, Assessment of Early Flowering Brassica juncea Lines 87KA44, 87E41, 87LG38, 87KA44, 87LG38, Yield Performance of Traizine Resistant Rapeseed 87AL25, 87E40, 87KA42, 87KA42, 87LG37, 87MA32, Assessment of Short Statured B. napus lines 87AL26, 87KA43, 87MA33, Rapeseed Extension: Demonstration Trials 87ERS39, 87JE29, 87KA41, 87NA78. 2. Tillage. The effect of Gypsum, tillage and nitrogen on cereal yields in a continuous crop system 84KA28 The effect of Gypsum, tillage and nitrogen on cereal yields farm system with a medic component 87KA47 Pasture regeneration counts for tillage trials 77MT51, 77M56, 77WH88, 82M35, 85M67A, 86M56.
Evaluation Of New Pasture Legume Species In Terms Of Summer Feeding Value And Effects On Wool Production., S E. Flecker, C W. Thorn, J. B. Rowe, Tess Casson
Evaluation Of New Pasture Legume Species In Terms Of Summer Feeding Value And Effects On Wool Production., S E. Flecker, C W. Thorn, J. B. Rowe, Tess Casson
Experimental Summaries - Plant Research
86KA71, Pasture legumes improve the feeding value of summer pastures in a mediterranean-type environment by maintaining the protein intake of grazing animals over the dry summer period, much of which comes from the ingestion of legume burr (A.D. Wilson and N.L. Hindley, 1968). Some of the most important species of pasture legumes to have been released commercially are Trifolium subterraneum (sub.clover), Medicago truncatula (barrel medic) and Medicago polymorpha (burr medic) (D.B. Purser, G.B. Taylor and W.J. Collins, 1987). What little information is available on the feeding value of these species suggests that barrel medic pod (H. Brownlee, 1973) and dry …
Trial 65sg5, I Rowland., W Hawkins
Trial 65sg5, I Rowland., W Hawkins
Experimental Summaries - Plant Research
Trial 65SG5. Location - Paddock H5 on Salmon Gum Research Station
Cleared in 1962, then cropped until the start of the trial in 1968. Two of the four blocks were sown to Cyprus Barrel medic which is topdressed with superphosphate. The other two blocks regenerate volunteer pasture which is not topdressed. In 1984 all pasture plots were sown to SERENA medic. This grew exceptionally well in 1984 and set a lot of seed. In 1987 field peas were introduced into 4 reps of an existing medic: crop rotation.
Tillage Investigations., R. J. Jarvis, L. G. Butcher, L. D.J. Smith
Tillage Investigations., R. J. Jarvis, L. G. Butcher, L. D.J. Smith
Experimental Summaries - Plant Research
77A16, red/brown sandy loam - York gum. 77WH17, yellow clayey-sand (Wongan loamy sand). 77M13, red sandy clay loam (Salmon Gum, Gimlet). 77Mt15, gravelly loamy sand/sandy loam - forest soil. 77A43 brown loamy sand/sandy loam - jam country. 77WH88, grey loamy sand over gravel at 50 cm - Elphin soil series – Mallee. 77M56, red sandy clay loam - salmon gum, Gimlet. 82M35, Loamy sand/sandy loam – Mallee. 77E52, fine white sand over gravel at 40 cm. 85SG28, grey-brown calcareous Earth - Kumarl – SGRS. 84M064, heavy land management systems - medium rainfall area. 84M063, heavy land management systems - ne …
Harvest Index Of Lupins, Low Tillering Cereals And Maturity By Sowing Date In Cereals., R. J. Delane, J. C. Mathews, J. A. Bright
Harvest Index Of Lupins, Low Tillering Cereals And Maturity By Sowing Date In Cereals., R. J. Delane, J. C. Mathews, J. A. Bright
Experimental Summaries - Plant Research
Trial 87GE21
Effect of plant density on branching, pod setting and yield development of lupins.
Location: Geraldton
To determine the influence of plant density and between-plant variability in vegetative growth on the branching, pod setting and yield development of lupins
Trial 87GE9
Chemicals to control vegetative growth and improve pod set in lupins.
Location: West Binnu
To examine the effect of a number of growth regulating chemicals on the branching, pod setting and yield of lupins under conditions favoring high biomass production.
Trial 87GE19
Chemicals to control vegetative growth and improve pod set in lupins.
Location: Nabawa
To examine the …
Crop Agronomy., S. Porritt
Crop Agronomy., S. Porritt
Experimental Summaries - Plant Research
Seeding machinery for stubble retention in lupin cereal rotations, 85LG21, and 85LG22. Dynamic Lifter (cereal mix) fertiliser evaluation, 86LG2. Cultural systems for lupin: wheat rotations on water repellent soils, 87ES2. Stubble retention and Rovral for brownspot control in lupins, 87M66. Straw length Effects on wheat growth on red-brown earths, 87M70. Row spacing and stubble retention effects on wheat growth on red-brown earths, 87M71. Nitrogen fertiliser for wheat production after volunteer pasture or sub clover-based pasture, 87ME73 and 87ME74. Effect of seeding rate and sowing depth on lupin establishment, 87ME75. Time of seeding various wheat varieties, 87WE76.
Wheat Experimental Results, S. P. Loss
Wheat Experimental Results, S. P. Loss
Experimental Summaries - Plant Research
The development of wheat relative to frost susceptibility, 87NA10. Optimum flowering times of wheat, 87NA11 and 87WH8. Grain growth and development of a historical set of wheats.
Long Season Wheat, W. R. Smith, K. Anderson
Long Season Wheat, W. R. Smith, K. Anderson
Experimental Summaries - Plant Research
Agronomy of long season wheats, 87AL9, 87AL10, 87ES3, 87ES4, 87JE2, 87JE3, 87MT8, 87MT9 and 87NA9. Septoria control in long season wheat, 87E4 and 87MT10. Nitrogen response by long season wheat, 87ES5 and 87JE4. Phenology of long season wheats, 87E5 and 87MT11.
Disease And Insect Resistance; Murex Medic Evaluation; Legume Species Phasic Development, D J. Gillespie
Disease And Insect Resistance; Murex Medic Evaluation; Legume Species Phasic Development, D J. Gillespie
Experimental Summaries - Plant Research
A summary of the performance of the control varieties (four replications) is shown in Table 3. A summary of the root rot ratings for some varieties showing a range of root rot susceptibility to all four pathogens is given in Table 4. Plant weights were recorded for all varieties tested against the three pathogens in the Western Australian experiments. Results for 12 of the 60 varieties are shown in Table 5. Murex medic evaluation. 86MT56 (Mount Barker), Gravelly loam pH 5.2 (water). 86NA46 (Darken) Loamy sand pH 5.4 86M037 (Regans Ford) Fine red sand pH 5.8 All sites were established …
Grain Legumes Evaluation., G. H. Walton, T. R. Trent
Grain Legumes Evaluation., G. H. Walton, T. R. Trent
Experimental Summaries - Plant Research
Lupin agronomy, 87AL14. Nitrogen fertilizer for legume crops, 87BA2. Pea variety evaluation, 87C59, 87M08, 87ME1, 87N012, 87SG8, 87KA7, 87N2. Interstate pea variety trials, 87N096, 87N099, 87KA6. Disease Resistance Pea Variety Testing, 87JE1. Grain legume species comparisons, 87A2, 87C2, 87KA37, 87M09, 87MA1, 87NA15. Legume species variety trials, 87LG2. Faba bean evaluation, 87MC34 and 87KA8. Faba bean 'synthetic' variety yield trial, 87MC36. Faba bean screening nursery, 87MC35. Preliminary agronomy of faba bean, chickpea and lentil, 87A21. Seeding date, 87A22. Legume species herbicide tolerance, 87KA82.
Serradella Line Evaluation — Stage 2, L. Cransberg
Serradella Line Evaluation — Stage 2, L. Cransberg
Experimental Summaries - Plant Research
Trial 85AL55.
Location: South Sterlings
To evaluate 23 promising serradella lines in terms of herbage and seed production and regenerative ability.
The Effect Of Soil Acidity On Barley, P J. Dolling, T. D. Haines
The Effect Of Soil Acidity On Barley, P J. Dolling, T. D. Haines
Experimental Summaries - Plant Research
Three liming experiments were established to confirm previous estimates of the critical soil acidity level for barley. Two experiments studying the effect of depth of incorporation on the effectiveness of lime, established in 1986, were continued in 1987.
The results from the three liming experiments established this year supported the conclusion that barley is affected by soil acidity at pH's around 4.2 and 4.3 (CaC12) and that depth of this acid layer is important.
Significant lime responses were obtained at the Katanning depth of lime incorporation site but conclusions can not be made because of possible mixing of …
Trial 67n4, I Rowland, W Hawkins
Trial 67n4, I Rowland, W Hawkins
Experimental Summaries - Plant Research
Trial 67N4. Location Newdegate Research Station. Long term rotation trials.
An old land site, cleared in 1951 and in pasture (Dwalganup sub clover) from 1963 to 1967. All plots were sown to Nungarin sub clover, by 1982 all plots had been resown.
Trial 67c13, I Rowland, W Hawkins
Trial 67c13, I Rowland, W Hawkins
Experimental Summaries - Plant Research
Trial 67C13. Location paddock 19B on Chapman Research Station (Nabawa).
Long term rotation trials.
An old land site, cleared in 1903. Sown to Dwalganup sub clover in 1964, topdressed each year until the start of the trial in 1967. In 1981 to 83 all plots were reseeded with Northam at 20 kg/ha.
Seed Rate And Nitrogen On Wheat, J W. Bowden
Seed Rate And Nitrogen On Wheat, J W. Bowden
Experimental Summaries - Plant Research
Trial 87MO49
Location: Wannamal
To examine the economic choice of nitrogen and seeding rates in a leaching situation with a high yield potential.
To test the nitrogen section of NP-Decide.
To gather data that enables competition for resources to be examined by regarding the crop as a population of individual plants.
General Comments And Comparative Yields, W Porter, S Carr
General Comments And Comparative Yields, W Porter, S Carr
Experimental Summaries - Plant Research
General comments and comparative yields on all trials.
87ME77, 87ME78, 87ME79, 87ME80 and 87ME81, 87ME82, 87ME83, 87ME84, 87ME85, 8714E88
Manipulation Of The Soil Seed Reserves Of Bromus Diandrus And B. Rigidus By Enhancing The Breakdown In Seed Dormancy., A H. Cheam
Experimental Summaries - Plant Research
Location: South Perth Field Plots
Previous studies on the seed bank of Bromus diandrus indicated that shallow burial of newly shed seeds enhanced the breakdown in seed dormancy over the summer period. To bury the Bromus seeds one practical approach is to introduce sheep into the paddock.
This study is a repeat of the previous work but included B. rigidus, another species of Bromus, that is commonly ground growing in association with B. diandrus.
Location: South Perth Field Plots.
Brome Grass Control In Wheat, G. S. Gill, R. L. Thomas
Brome Grass Control In Wheat, G. S. Gill, R. L. Thomas
Experimental Summaries - Plant Research
Brome grass control in wheat
87GE29, 87WH9
Competition between wheat and mixtures of brome grass and doublegees.
87GE30
Saffrom Thistle, Seed Set Control, J. R. Peirce, B. J. Rayner
Saffrom Thistle, Seed Set Control, J. R. Peirce, B. J. Rayner
Experimental Summaries - Plant Research
Trial 87ME119 - Saffron thistle, seed set control.
Trial 87TS38 - Saffron thistle control (seed set)
Trial 87JE42 - Seed set control in Saffron thistle.
All treatments had some measure of reducing seed production. Best control was obtained by applying chemicals just at or prior to flowering.
History Effects On Wheat Response., J. H. Moore, G. R. Dean
History Effects On Wheat Response., J. H. Moore, G. R. Dean
Experimental Summaries - Plant Research
Trial 85AL42
To determine the effects of tillage, sowing density, and time of planting of Osprey and Aroona on the pest and disease incidence, early growth and yield.
Field Pea Agronomy., I. A. Pritchard, G. Cooper, D. Dodge
Field Pea Agronomy., I. A. Pritchard, G. Cooper, D. Dodge
Experimental Summaries - Plant Research
Field peas sowing rates, 87A31. Field peas time of sowing, 87A32. Field peas factional agronomy, 87A33. Field pea sowing rates, 87N092. Field peas time of sowing, 87N093. field peas - factorial agronomy, 87N094.
Population Dynamics Of Brome Grass In Relation To Control Systems, A H. Cheam, Stephen Lee, C. M. Ralph, P Nelson
Population Dynamics Of Brome Grass In Relation To Control Systems, A H. Cheam, Stephen Lee, C. M. Ralph, P Nelson
Experimental Summaries - Plant Research
Trial 86C1
Location: East Chapman Research Station.
To identify the level of control of brome grass under various crop rotation systems so that farmers can be advised on the degree of infestation likely to be encountered when using a particular system.
To design the best control system to reduce quickly the anticipated large seed population of brome grass in the soil.
Trial 66m29, I Rowland., W Hawkins
Trial 66m29, I Rowland., W Hawkins
Experimental Summaries - Plant Research
Trial 66M29. Location Merredin sandy clay loam. Response to nitrogen.
An old land site, cleared in 1909. First sown to Cyprus Harrel medic in 1955, grazed and topdressed. Cropped, 1962 and 1964. Medic resown in 1965.
Agronomy Of Wheat Cultivars., W. K. Anderson, M. Seymour
Agronomy Of Wheat Cultivars., W. K. Anderson, M. Seymour
Experimental Summaries - Plant Research
Location: Northam, Wongan Hills, East Beverley, Corrigin and Merredin.
Time of sowing x wheat cultivars, 87N07, 87N011, 87WH7, 87NA4, 87M11. Time of sowing x wheat cultivars.
Nitrogen rates x wheat cultivars, 87N05, 87N09, 87WH5, 87NA2, 87M9.
Seed rates x wheat cultivars, 87N06, 87N010, 87WH6, 8JNA3, 87M10.
Wheat cultivar factorial, 87N04, 87N08, 87WH4, 87NA1.
Experiments On Grain Yield In A Range Of Old And Modern Wheat Varieties., K. H.M. Siddique, D. Tennant, R. K. Belford, M. W. Perry, L. Mclaughlin, A. R. Thompson
Experiments On Grain Yield In A Range Of Old And Modern Wheat Varieties., K. H.M. Siddique, D. Tennant, R. K. Belford, M. W. Perry, L. Mclaughlin, A. R. Thompson
Experimental Summaries - Plant Research
Growth, yield, water use and water use efficiency of old and modern wheat varieties in a mediterranean type environment, 87M17 and 87WH14. Ear and stem dry matter at anthesis and grain yield in a range of wheat varieties, 87M18.
The Role Of Barley In Future Rotational Systems In Drier Wheatbelt Areas Of Western Australia., P. Simpson
The Role Of Barley In Future Rotational Systems In Drier Wheatbelt Areas Of Western Australia., P. Simpson
Experimental Summaries - Plant Research
Comparison of barley and wheat yields over four soil types and yield component analysis at Nangeenan NW of Merredin, 86ME88, 86ME89, 86ME90 and 86ME91. Comparison of barley and wheat yields over four soil types at Bodallin, east of Merredin, 86ME92, 86ME93, 86ME94 and 86ME95. Comparison of barley and wheat yields over two ‘levels’ of soil salinity - EC, 87ME63 and 87ME64. Comparison of barley and wheat yields over 2 soils of differing textural type – ‘heavy’ and ‘light’, 87ME65 and 87ME66. Effect of time of sowing on barley and wheat yields, 87ME67.
Trial 68e5, I Rowland., W E. Hawkins
Trial 68e5, I Rowland., W E. Hawkins
Experimental Summaries - Plant Research
Trial 68E5. Location paddock N1A on Esperance Downs Research Station (Gibson). Long term rotation trials.
Cleared in 1951 and sown to clover, cropped in 1961 and 1962 then Woogenellup sub clover and Brome grass were sown in 1963, topdressed until the start of the trial in 1968. Lupins were sown in trial in 1974. Esperance sub clover has been established on all plots.