Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Earth Sciences

Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 53821 - 53850 of 59385

Full-Text Articles in Entire DC Network

Slope Stability As Related To Geology At Rainier, Columbia County, Oregon, James Douglas Gless Jan 1989

Slope Stability As Related To Geology At Rainier, Columbia County, Oregon, James Douglas Gless

Dissertations and Theses

Rainier, Oregon, has experienced problems in the development of residential and commercial sites, utilities, and transportation facilities as a result of slope instability. This study of slope stability at Rainier was conducted at the request of city officials.


Hydrogeological And Hydrogeochemical Evaluation Of A Proposed Flue Gas Cleanup Dry Waste Disposal Pit Near Beulah, North Dakota, Nathan T. Hunke Jan 1989

Hydrogeological And Hydrogeochemical Evaluation Of A Proposed Flue Gas Cleanup Dry Waste Disposal Pit Near Beulah, North Dakota, Nathan T. Hunke

Theses and Dissertations

The Coyote I electrical operating station of the Montana Dakota Utilities Company (MDU) is located near Beulah, North Dakota. Flue gas cleanup {FGC) dry waste is generated by the facility in the conversion of coal to electricity. MDU submitted a permit application to the North Dakota State Department of Health {NDSDH) to dispose of FGC dry waste in a strip-mined area 1.6 kilometres northeast of the plant.

Two disposal pits were proposed by MDU, a Phase I and Phase II pit. The objectives of the investigation were to determine the hydrogeological and hydrogeochemical suitability of the site for FGC waste …


Some Hydrologic Aspects Of Snowmelt Runoff Under Summer Conditions, In The Barpu Glacier Basin, Central Karakoram, Himalaya, Northern Pakistan, Ali Ghazanfar Jan 1989

Some Hydrologic Aspects Of Snowmelt Runoff Under Summer Conditions, In The Barpu Glacier Basin, Central Karakoram, Himalaya, Northern Pakistan, Ali Ghazanfar

Theses and Dissertations (Comprehensive)

Snow and ice in high mountains represent and important water resource in many parts of the world, especially the dry continental interior of Central Asia. In the Northern Areas of Pakistan, mountain ranges are the primary sources of annually renewed water supplies. They give rise to rivers which are the only significant, sustainable source of fresh water. The Indus basin is drained by the river Indus and its major tributaries, the Kabul, Jhelum, Chanab, Ravi and Sutlej. Snowmelt contributes about 70 percent to the annual flow of these rivers, but is not timed to meet the requirements for crop production, …


Ablation On Barpu Glacier, Karakoram Himalaya, Pakistan A Study Of Melt Processes On A Faceted, Debris-Covered Ice Surface, Mohammad Inamullah Khan Jan 1989

Ablation On Barpu Glacier, Karakoram Himalaya, Pakistan A Study Of Melt Processes On A Faceted, Debris-Covered Ice Surface, Mohammad Inamullah Khan

Theses and Dissertations (Comprehensive)

No abstract provided.


Environmental Planning Of Large-Scale Water Projects: The Three Gorges Dam Case, China, Long Li Jan 1989

Environmental Planning Of Large-Scale Water Projects: The Three Gorges Dam Case, China, Long Li

Theses and Dissertations (Comprehensive)

Controversy over the construction of the Three Gorges Dam across the Yangtze River in China is an on-going national issue. Proposals have been advanced by numerous disciplinary research teams to identify the environmental consequences of the project development. However, whether the project will benefit or damage the overall environment still remains in question.

No matter which one of the four storage schemes is going to be put into operation, the human, economic, biological, and physical environmental alterations will have no equal in the our contemporary world and probably even for some time in the future. Above all, flood control, hydro-electricity …


Paleoenvironmental History Of The Middle Ordovician Rugosa Of Eastern North America, Gretchen Hampt Andreasen Jan 1989

Paleoenvironmental History Of The Middle Ordovician Rugosa Of Eastern North America, Gretchen Hampt Andreasen

Honors Papers

Our understanding of the structure and function of biological systems can be increased when viewed in the context of their evolutionary history on a geological time scale. Generally, both paleoecology and ecology have focused on the interrelationships of organisms and their environments in short time frames. For instance, a paleoecologist might study the fossil communities of the Columbus Limestone reefal environment at Marblehead, Ohio, or an ecologist might attempt to characterize the interrelationship of glacier lilies and their pollinators. Both workers may realize that the organisms they study evolved in response to ecological pressures, yet neither, most likely, considers that …


Blackland Prairies Of Southwestern Arkansas, Thomas L. Foti Jan 1989

Blackland Prairies Of Southwestern Arkansas, Thomas L. Foti

Journal of the Arkansas Academy of Science

The Blackland Prairie community type has been described in Texas; related communities exist in Alabama and Mississippi. The Arkansas variant of the community has not been described in detail. Since the Arkansas Natural Heritage Commission began a systematic inventory of the community in 1985, more than 36 remnants have been identified that retain substantial natural character. However, all show some degree of disturbance. Based on aerial photo interpretation, aerial inspection, and ground study, an initial description of the community is presented, including original distribution, soil, vegetation and relationship to similar communities of Texas, Mississippi, and Alabama.


Soil Micromorphologic Features Of Holocene Surface Weathering And A Possible Late Quaternary Buried Soil, Northwest Arkansas, Diane Phillips, Margaret J. Guccione Jan 1989

Soil Micromorphologic Features Of Holocene Surface Weathering And A Possible Late Quaternary Buried Soil, Northwest Arkansas, Diane Phillips, Margaret J. Guccione

Journal of the Arkansas Academy of Science

Micromorphologic features of an alfisol developed in White River alluvium near Fayetteville, Arkansas are typical for this soil order. The A horizon has a relatively high organic matter content and an abundance of quartz sand grains with a silt and clay matrix. Voids are relatively common and some have been partly infilled. In contrast to the A horizon, the E horizon has less organic matter, larger voids, and some weak orientation of the clay matrix. The parent material for these horizons was deposited in the past 4,700 years and these pedologic horizons have formed since that time. In the underlying …


Geology And Petrochemistry Of The Mount Chase Massive Sulfide Prospect, Penobscot County, Maine, Michael V. Scully Jan 1989

Geology And Petrochemistry Of The Mount Chase Massive Sulfide Prospect, Penobscot County, Maine, Michael V. Scully

Masters Theses

"The Mount Chase massive sulfide prospect of northern Penobscot County, Maine was discovered in 1979 by Getty Mining Company. The deposit occurs within a sequence of lower paleozoic metavolcanic and metasedimentary rocks. The footwall units consist of rhyolitic flows, quartz-feldspar crystal tuff, and altered tuffaceous volcanic breccias. These rocks lie unconformably upon intensely folded sediments which are tentatively correlated with the Grand Pitch Formation of probable Cambrian age. The footwall volcanoclastic rocks exhibit a narrow zone of intense chloritic alteration immediately below the massive sulfide horizon, and a broader zone of sericitic alteration below that. A zone of stringer mineralization …


Saltland Management, Tim Negus Jan 1989

Saltland Management, Tim Negus

Natural resources published reports

Salt land problems in Western Australia are categorized into one of three types:

* Valley waterlogging

* hillside seepage

* dry land salt


El Hombre Comenzó A Extinguir Especies Hace 11.000 Años, Aldemaro Romero Jr. Jan 1989

El Hombre Comenzó A Extinguir Especies Hace 11.000 Años, Aldemaro Romero Jr.

Publications and Research

No abstract provided.


An Assessment Of Soil Capability For On-Site Effluent Disposal, East Carnarvon, Western Australia, M R. Wells Jan 1989

An Assessment Of Soil Capability For On-Site Effluent Disposal, East Carnarvon, Western Australia, M R. Wells

Resource management technical reports

No abstract provided.


Catchment Salinity : Report On A Study Of The East Perenjori Catchment, C J. Henschke Jan 1989

Catchment Salinity : Report On A Study Of The East Perenjori Catchment, C J. Henschke

Resource management technical reports

Dryland secondary salinisation has debilitated large areas of land in Western Australia due to clearing of native vegetation for agricultural development. The initial aim of the project (which is the subject of Part I of this report) was to establish a landscape framework for hydrogeological examination of the salinity problem. A catchment of 139 km2, located 30 km east of Perenjori townsite was selected for detailed study. It was mapped for soils, vegetation, topography, landform and salinity using both old and recent aerial photography. A field survey of soil hydraulic conductivity was undertaken to help define recharge areas. Soil-vegetation associations …


Glacial Deposits, Vol. 17, 1988-1989, Department Of Geography-Geology Jan 1989

Glacial Deposits, Vol. 17, 1988-1989, Department Of Geography-Geology

Glacial Deposits

Newsletter of the Department of Geography-Geology


Sedimentary Depositional Cyclicity, Mission Canyon And Charles Formations (Mississippian), Williston Basin, North Dakota, Jean L. Hoff Jan 1989

Sedimentary Depositional Cyclicity, Mission Canyon And Charles Formations (Mississippian), Williston Basin, North Dakota, Jean L. Hoff

Theses and Dissertations

Workers within the Williston Basin have repeatedly reported the presence of sedimentary cyclicity within the carbonate and evaporite succession of the Mississippian Madison Group. Descriptions of cyclicity are diverse and commonly conflict. Previous work has been exclusively qualitative. This study used a group of statistical techniques in a method designed specifically for the objective identification and evaluation of cyclicity in the lithofacies sequence of the Mission Canyon and lower Charles Formations in North Dakota.

Twelve cores were sampled at every visually distinguishable lithologic unit. Forty-six lithologic components were counted in each sample on a presence-absence basis. The phi association coefficient …


Evolution Of The Aeluroid Carnivora: Significance Of The Ventral Promontorial Process Of The Petrosal, And The Origin Of Basicranial Patterns In The Living Families, Robert M. Hunt Jr. Jan 1989

Evolution Of The Aeluroid Carnivora: Significance Of The Ventral Promontorial Process Of The Petrosal, And The Origin Of Basicranial Patterns In The Living Families, Robert M. Hunt Jr.

Department of Earth and Atmospheric Sciences: Faculty Publications

In studies of carnivoran phylogeny, the configuration and ontogenetic development of the auditory bulla enclosing the middle ear have been useful in tracing modern lineages to their first appearances in the mid-Cenozoic. Pre-Oligocene carnivorans, however, lack preserved bullae and have been difficult to relate to later Cenozoic groups. The carnivoran petrosal bone, because of its durability both in intact skulls and as an isolated element, can be tracked through Cenozoic time, and can supply new information on lineage continuity through its geometry and spatial relationships. Aeluroid carnivorans are united by a petrosal of characteristic shape, distinguished by a ventral promontorial …


Brome Grass Population Dynamics In Relation To Control Systems, A H. Cheam, S I. Lee Jan 1989

Brome Grass Population Dynamics In Relation To Control Systems, A H. Cheam, S I. Lee

Experimental Summaries - Plant Research

To identify the level of control of brome grass under various rotation systems, 86C1.


Tactical Nitrogen Decisions For Wheat, J. W. Bowden, R. J. Lunt Jan 1989

Tactical Nitrogen Decisions For Wheat, J. W. Bowden, R. J. Lunt

Experimental Summaries - Plant Research

Trial 88MO41, 88WH40 (2CE), 88WH40 (4W), 89NO77, 89MO47, 89MO47, 89MO49, 89BA33 (1), 89BA33 (2), 89WH70 (1), 89WH70 (2)

Locations: Wannamal, WHRS, Grass Valley, Regan's Ford, Badg. New Block 3CE

In order to test tactical and other fertilizer decision making methods (Table 1), we carried out three trials in 1988 and a further seven trials in 1989 (Table 2).

To date this programme has provided a lot of information which can be used to test and validate current (and future) methods of predicting yield potential and nitrogen status of a crop as the season progresses. However, our inability to predict end …


Pasture Species Investigations., D. A. Nicholas Jan 1989

Pasture Species Investigations., D. A. Nicholas

Experimental Summaries - Plant Research

Trial 87WH50, 87NA77, 87KA39

Location: Wongan Hills, Kulin, Nyabing

Selection of subclover cultivars - early maturing.

To select in the field subterranean clover cultivars of early maturity having superior persistence and productivity.


The Grazing Value Of Medicago Murex., C. M. Saunders Jan 1989

The Grazing Value Of Medicago Murex., C. M. Saunders

Experimental Summaries - Plant Research

Trial 88KA92

Location: Potts Road, East Kojonup.

At present, limited information is available on the grazing value of Medicago murex cv. Zodiac on sheep live weights and wool growth. This trial was designed to provide data on the relative performance of sheep grazing Zodiac compared with the recommended subterranean clovers (Junee/Seaton Park) in the > 450mm rainfall zone in WA.


Interaction Of Rhizoctonia Root Rot On Wheat With Post Emergence Herbicides, W Macleod Jan 1989

Interaction Of Rhizoctonia Root Rot On Wheat With Post Emergence Herbicides, W Macleod

Experimental Summaries - Plant Research

Interaction of Rhizoctonia root rot on wheat with post emergence herbicides, 88E30. Location, aim, treatment, method, results, table1. Take-all inoculum levels in a ryegrass sward after treatment with hoegrass. 88MD30. Location, aim, treatment, method, results, Interaction of Pleiochaeta root rot on lupins with Simazine®, 88ME64, 88WH335, 88ME64. Location, aim, treatment, method, results, tables 1 to 8.


Planning For Horticultural Expansion On The Swan Coastal Plain, P Coghlan, Geoff Moore, Jim Dixon Jan 1989

Planning For Horticultural Expansion On The Swan Coastal Plain, P Coghlan, Geoff Moore, Jim Dixon

Journal of the Department of Agriculture, Western Australia, Series 4

Horticulture is an intensive, high value form of agriculture highly dependant on the availability of good water supplies for the year-round production of fresh produce. Production increase in Western Australia and the encouragement and development of export markets has caused rapid expansion if the industry in recent years.

Expansion is expected to continue, placing severe pressure on available water supplies and suitable land close to markets. At present' 90 per cent of the Stase's horticultural land is on the Swan Coastal Plain and minor selected hills areas around Perth.


Effect Of Seed Phosphorus, Seed Size And Seedling Density On The Growth Of Lupins., M. M. Riley, M. D. Bolland, K. Adcock Jan 1989

Effect Of Seed Phosphorus, Seed Size And Seedling Density On The Growth Of Lupins., M. M. Riley, M. D. Bolland, K. Adcock

Experimental Summaries - Plant Research

Trial 89SC22

Location: South Carrabin Research Station, Hayden paddock.

Effect of seed phosphorus concentration, fertilizer P level, seed size and seeding rate on plant counts at 6 to 21 weeks.


Effects Of Seed Phosphorus Concentrations And The Source Of The Seed On Growth Of Lupins., M. M. Riley, M. D. Bolland, K. Adcock Jan 1989

Effects Of Seed Phosphorus Concentrations And The Source Of The Seed On Growth Of Lupins., M. M. Riley, M. D. Bolland, K. Adcock

Experimental Summaries - Plant Research

Trial 89EC31

Location: East Chapman Research Station.

The effect of seed phosphorus concentration, source of seed and fertilizer P level on plant counts from six to 20 weeks.


Harvest Index Of Lupins, Direct Drilling On Sandplain Soils., Rob Delane, Carmel Schmidt, Glenn Adam Jan 1989

Harvest Index Of Lupins, Direct Drilling On Sandplain Soils., Rob Delane, Carmel Schmidt, Glenn Adam

Experimental Summaries - Plant Research

Chemicals to improve pod setting in Lupins (Small plots), 89C23, 89GE74,

Chemicals to improve pod setting in Lupins (Large plots) 89GE72, 89GE75.


Cultivar Evaluation On Low Rainfall Heavy Textured Soils., Bradley Nutt Jan 1989

Cultivar Evaluation On Low Rainfall Heavy Textured Soils., Bradley Nutt

Experimental Summaries - Plant Research

a. Trial 88GE34

Cultivar evaluation in machine sown plots.
Location: NMRS

The higher seed yield of Serena compared to the other cultivars resulted in better early forage .production as well a legume dominated pasture.

b. Trial 88TS 63 and 88TS 65

Wheat yields following pastures.
Location: 88TS63 - Perenjori and 88TS65 - Three Springs.

There was no response to nitrogen in either biological yield or grain yield of wheat sown over volunteer based pasture at the Three Springs site. All pasture treatments resulted in similar wheat yields except for Sava because of poor control of the snail medic under the …


Aphid Tolerance Evaluation In Annual Medics., Bradley Nutt Jan 1989

Aphid Tolerance Evaluation In Annual Medics., Bradley Nutt

Experimental Summaries - Plant Research

Trial 89GE61

Location: East Chapman

Out of the 100 lines tested, 30 experimental lines were less affected (in terms of seed yield) by aphid damage than c.v. Parabinga.


Effect Of Seed Phosphorus Levels In Three Wheat Varieties And Fertilizer P Supply On Their Growth And Grain Yields., M. M. Riley, M. D. Bolland, K. Adcock Jan 1989

Effect Of Seed Phosphorus Levels In Three Wheat Varieties And Fertilizer P Supply On Their Growth And Grain Yields., M. M. Riley, M. D. Bolland, K. Adcock

Experimental Summaries - Plant Research

Trial 89WH74

Location: Wongan Hills Research Station, Field 4W

Effect of phosphorus and fertilizer on the growth and grain of wheat yields.


Potassium Nutrition Of Pastures On The Sandplain Soils Of Western Australia., Noeleen Edwards, M. Thomas Jan 1989

Potassium Nutrition Of Pastures On The Sandplain Soils Of Western Australia., Noeleen Edwards, M. Thomas

Experimental Summaries - Plant Research

Project: Potassium nutrition of pastures on the sandplain soils of Western Australia.

Determine the factors affecting the fate of native and applied potassium on sandplain soils.
Define current and residual response curve parameters for potassium applications. Develop recommendations for the economic management of soil potassium levels.

Trial 88B46, 88TS69, 89KO26

Maintenance application rates of potassium on sandplain soils.

Location: Badgingarra Research Station, new block, North Eneabba, Kojaneerup Research Block.

Trial 89BA24

Residual value of potassium on sandplain soils.

Location: Badgingarra Research Station

Trial 89MT46,

Potassium requirements of sub clover.

Location: Mt Barker Research Station.

Project: Potassium nutrition of lupins on …


Barley Agronomy Experiments., K. L. Young Jan 1989

Barley Agronomy Experiments., K. L. Young

Experimental Summaries - Plant Research

Trial 89E1, 89SG1, 89MT3

Barley variety x time of sowing trials.

Location: Esperance Downs Research Station, Salmon Gums Research Station, Mt Barker Research Station

To determine the optimum time of ear emergence for barley varieties which vary in maturity.

Trial 89ES2

Location: Melijinup Field Station

Barley variety x time of sowing trials

1. Assess the effect of aphids on the yield of barley at a range of sowing times.

2. Determine the optimum time of ear emergence for barley varieties which vary in maturity.

Trial 89E6

The effect of aphids on the yield of barley

Location: Esperance Downs Research Station. …