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Ecology Of Skeleton Weed (Chondrilla Juncea) In Wa. Population Studies On Pennyroyal (Mentha Pulegium)., F D. Panetta

Experimental Summaries - Plant Research

The ecology of skeleton weed - Cunderdin, Tammin, Narembeen (2 sites), Chapman valley, Eradu, East Badgingarra, Moorine Rock. Fate of buried seeds: Chapman, Merredin, Esperance Research stations. Population studies on pennyroyal: Seed production - Denmark, Mount Barker, Frankland. Sizes of seed banks of pennyroyal in pasture and ruderal situations – Denmark, West Denmark, Karri Heights, Narrikup (1), Frankland River. Ruderal populations – Mt Barker (1), Frankland, William bay, East Denmark, Narrikup (2), Denbarker, Mt Barker (2). Seedling emergence and survival – Denmark, Mt Barker, Frankland. Genetic differences between populations.

The Effects Of Ultraviolet-B Radiation On Plant Competition In Terrestrial Ecosystems, Warren G. Gold, Martyn M. Caldwell

Green Canyon Environmental Research Area, Logan Utah

Evidence regarding the interaction of ultraviolet-B radiation and plant competition in terrestrial ecosystems is examined. The competitive interactions of some species pairs were affected even by ambient solar UV-B radiation when compared to control pairs grown without UV-B. Also, the total shoot biomass of these species pairs was depressed under ambient UV-B. Relatively large increases in UV-B radiation altered the competitive interactions of some species pairs grown in pots under field conditions, but did not affect the total shoot biomass production of those pairs. Recent field experiments have examined the competitive interactions of wheat and wild oat under a simulated …

Reassessment Of The Rates At Which Oil From Natural Sources Enters The Marine Environment, Keith A. Kvenvolden, John W. Harbaugh

United States Geological Survey: Staff Publications

Previous estimates of the world-wide input of oil to the marine environment by natural seeps ranged from 0 ·2 to 6 ·0 million (metric) tonnes per year with a 'best estimate' of 0 ·6 million tonnes per year. Based on considerations of the availability of oil for seepage from the world's known and assumed oil resources, we believe that the world-wide natural oil seepage over geological time should be revised to about 0 ·2 million tonnes per ),ear with a range upward or downward of a factor of ten leading to estimates between 0 ·02 and 2 million tonnes per …

Paleotemperature Oscillations In The Middle And Late Miocene Of The Northeastern Pacific, John A. Barron, Gerta Keller

United States Geological Survey: Staff Publications

The paleoclimatic and paleoceanographic history of the Middle and Late Miocene marginal eastern North Pacific as been studied in a north-to-south transect encompassing DSDP Site 173, the Newport Beach surface section, and DSDP Site 470, based on quantitative diatom and planktic foraminiferal analyses. Fourteen cold and 12 warm events that show close agreement with other microfossil studies as well as oxygen isotope records from low-latitude Pacific sites have been identified. Hiatuses are recognized at 7 to 6.5 Ma. 9.8 to 8.5 Ma, and 12 to 11 Ma at the three reference localities, and they correspond to widely recognized deep-sea hiatuses …

Herbicide, Cereal, Wheat Tolerance. Weed, Melon, Paterson's Curse, Iceplant, Mesquite Cotton Bush Chemical Control, R Madin, A Lindsay

Experimental Summaries - Plant Research

Herbicide tolerance trials – Merredin, Wongan Hills, Mount Barker. Cereal (wheat) Tolerance to various herbicides - 83LG37. Tolerance of wheat varieties to phenoxy herbicides - 83MO42. Long-term weed control on railway track - 81PE12, 81MO41. Melon control herbicides for melon control - 84M08, 84M09. Control of Paterson's Curse in Pasture - 83SW1. Chemical Topping of Paterson's Curse. Control of Iceplant (Mesembryanthemum nodiflorum) in crop and pasture - 83SG20, 83SG21. Chemical Control of Mesquite (Prosopis juliflora) - 82PH1. Chemical Control and Biology of Narrow Leaf Cotton Bush (Gomphocarpus fructicosa).

Summary Of Experimental Results 1982/83., J. Hamblin

Experimental Summaries - Plant Research

82C22, 82C23 Wheat Production Trials, 82C24 Nitrogen flows from different legume species and varieties, 82C10 Lupins under sown with Harbinger, 82Cl9 The effect of Simazine on Harbinger Medic, 82C21 Pea variety trial, 82C23 The effect of green manuring on wheat yields.

Long Term Minimum Tillage Investigations. Stubble Management Techniques. Deep Ripping., R J. Jarvis

Experimental Summaries - Plant Research

Long term minimum tillage Investigations (i) Continuous cropping (page 4) – 77A16, 77E18, 77M13, 78M25, 77MT15, 77WH17, 78BA42. (ii) Rotational sites (page 15) – 77A43, 77E52, 77M56, 77MT51, 77WH88, 82M35. Stubble management techniques (page 23) – 79M7, 79WH6, 82LG4, 82M34. Deep ripping (page 27) - 77WH17, 80A44, 80NO46, 81LG3, 81M45, 81M53, 81NO3 & 4, 82GE37 & 38, 82GE38, 82M61, 82M25, 82M31, 82M32, 82M46, 82M60, 82N32, 82NO48 & 49, 82NO50 & 51, 82WH49, 83JE26, 83NO69. Direct drilling – continuous cropping – 83NA37 (a), 83NA37 (b), 83NA38. Deep ripping (or “deep loosening”) – 79MO19, 83TS41, 83TS42.

The Effect Of Waste Stabilization Pond Seepage On Groundwater Quality Of Shallow Aquifers In Eastern North Dakota, David J. Brown

Theses and Dissertations

The use of stabilization ponds to dispose of municipal wastes has become popular with many North Dakota cities. When managed properly they are an efficient and economical method of waste disposal and may not adversely affect groundwater quality. In order to achieve efficient treatment, the ponds must be built in sediment that has permeability low enough to inhibit excessive percolation of wastewater into the subsurface. Some North Dakota cities have not met this basic requirement in the construction of their ponds. As a result, insufficiently treated pond liquids are allowed to reach the water table, potentially contaminating groundwater supplies. Three …

Quaternary Geology Of The Knife River Indian Villages National Historic Site, John Reiten

Theses and Dissertations

The archeology of the Knife River Indian Villages National Historic Site is being studied by the University of North Dakota Anthropology Department. The age of the near surface sediment and depositional history of Quaternary sediments are useful to archeologists involved in locating and interpreting the cultural resources of this area.

There are eight river terraces within a 300 square kilometre area surrounding the Knife River Indian Villages National Historic Site, near Stanton, North Dakota. , The terraces are former river floodplains that have been preserved above the present floodplain. The elevation above river level of the Pleistocene terraces are listed: …

Glacial Deposits, Vol. 11, 1982-1983, Department Of Geography-Geology

Glacial Deposits

Newsletter of the Department of Geography-Geology

Sources Of Phosphate Trials. Miscellaneous Trials, J W. Bowden, R J. Lunt, M Baker

Experimental Summaries - Plant Research

I. Sources of Phosphate Trials. Cropping Trials: (80BA6) - Deep sand, Badgingarra, Lupins. (77WH2) - Gravel, old land, WHRS, Wheat. (76WH9) - WLS, new land, WHRS, Wheat (1982). (76WH10) - WLS, young land, WHRS Wheat (1982). (77MT2) - Loamy gravel, old land, Mount Barker Oats. Pasture trials: (77MT1) - Loamy gravel, new land, Mount Barker. (77E1) - Sandy gravel, new land, Esperance. (77E4) – [78E4?] Sandy gravel, old land, Esperance. II. Miscellaneous Trials Long term trials. 66M30 - Super x stocking rate at Merredin. 48M/149 EX - Residual super trial at Merredin. 65A1, 65C5 and 69WH15 - Maintenance P x …

Grain Legume Agronomy Programme, G H. Walton

Experimental Summaries - Plant Research

TABLE OF CONTENTS 1. Lupin agronomy, Series 1 - Growth factor Interactions – 83BA6, 83JE3, 83NO4, 83NO5. Lupin growth and subsequent cereal crop yield – 82N18.

2. Lupin agronomy, Series 2 - Lupin response to Density, Harvest Index and yield – 83BA8, 83M4, 83MT6, 83N3.

3. Eregulla lupin rotation plots – 83MO27, 83M029 and 83M030.

4. Grain legume species trials: 4.1. Species comparison x site interaction – 83GE3, 83JE2, 83JE3, 83N2. 4.2. Preliminary examination of Simazine and Fusilade on legume species – 83NO6. 4.3. Species growth study – 83BA7, 83NO6.

5. Field pea agronomy - Density and time - 83N4, …

Residue Trials, Herbicide Incorporation And Leaching Of Chlorsulfuron, T Piper

Experimental Summaries - Plant Research

Residue Trials: Breakdown rates have been established for trifluralin at Wongan Hills and Avondale over the past two seasons. The decay curve follows a hyperbolic curve rather than the expected exponential curve with constant half life, probably due to the considerable loss of chemical by volatalization in the first few days, before biological decomposition takes over as the main breakdown factor.

b) Herbicide Incorporation. Du Pont Zl96 fluorescent orange powder at 30 g/m2 could be readily seen when illuminated by 400 yw/cm2 of 365 nm UV radiation, and was successfully photographed on Ektachrome 400 ASA film with a 4 sec. …

Miocene Burrows Of Extinct Bear Dogs: Indication Of Early Denning Behavior Of Large Mammalian Carnivores, Robert M. Hunt Jr., Xue Xiang-Xu, Joshua Kaufman

Department of Earth and Atmospheric Sciences: Faculty Publications

Partial skeletons off our species of extinct carnivores have been found in their dens excavated in the floodplain of an early Miocene ephemeral braided stream at Agate Fossil Beds National Monument, Nebraska. Bear dogs (Carnivora: Amphicyonidae) were the principal occupants; their den dimensions and body size are similar to those of living wolves and hyenas. Discovery of this predator community extends the record of denning behavior of large mammalian carnivores to the early Miocene, 20 million years ago.

Raw Water Quality In The New Charleston, Illinois Pump Storage Reservoir, Kevin G. Lookis

Masters Theses

Charleston, Illinois, a city located in east-central Illinois, recently implemented a new concept in a raw water system. Due to storage capacity-sedimentation problems in the old Lake Charleston-Embarras River raw water supply, the Charleston Pump Storage Reservoir was constructed. The new system involved building a dike separating the Lake Charleston impoundment from the Embarras River. Water to increase the storage capacity of the reservoir can now be selectively pumped into the impoundment from the river.

Raw water quality in the reservoir was monitored on a weekly basis for a full year from August, 1981 to August, 1982. The levels of …

Classification Of Pseudokarst Forms In Czechoslovakia, Jan Vitek

International Journal of Speleology

The paper is a geomorphological classification of pseudokarst forms in Czechoslovakia/Bohemien Massif and the Carpathians. In the author’s opinion, forms occurring in non-carbonate rocks, are morphologically and often genetically analogous to the forms of karst relief, and are pseudokarst phenomena. They are divided according to their size into macroforms in sandstone morphostructures of the Bohemian Cretaceous Basin some types of rocky valleys, water-shed plains and ridges, forming rock cities in some places, mesoforms with six types of caves, sinkholes, rock perforations and several rock phenomena and microforms such as weather pits and niches, lapies, etc.. The most prominent pseudokarst phenomena …

Geology Newsletter- 1982, Department Of Geology

Geological and Environmental Sciences News

Vol. 1 No. 7

• Dear Alumni and Friends
• Capital Fund Drive
• Geology/ Earth Science Club News
• Faculty News
• Alumni News

Does No-Till Change Soil Management Practices?, Robert L. Blevins

Soil Science News and Views

Successful no-tilling requires a different approach to soil management practices. Since continuous no-tillage systems leave residues on the soil surface without mechanically mixing them into the plow layer and since lime and fertilizer are surface-applied, no-tilled soils have biological, chemical and physical properties contrasting with those of a plowed soil. For any crop production system to be widely accepted and used it must provide and maintain desirable physical properties of the soil, control erosion and replace nutrients removed by crops and other losses. This can be accomplished in a no-till system if proper management is used.

Some Effects Of The Polychaete Nereis Succinea Frey And Leukart 1847 On The Distribution Of Copper Cadmium And Zinc In Sediments And Water, Gabriela Kitzig August

OES Theses and Dissertations

Two laboratory experiments, each lasting 216 hours, were conducted in order to determine the effects of a burrowing polychaete, Nereis succinea Frey and Leukart, 1847, on the distribution of copper, cadmium, and zinc in sediments and water in environmentally controlled microcosms. Dissolved metal concentrations in microcosms containing worms (experimental) decreased more rapidly than in microcosms without worms (controls). From 72 hours to 216 hours, suspended metal concentrations in experimental microcosms increased while concentrations in controls remained relatively constant. Sediment cadmium concentrations in experimental microcosms increased more over time than in controls. Polychaetes accumulated significant amounts of all three metals. These …

The Effects Of Varying Fresh Water Discharge On Dispersion In An Estuarine Hydraulic Model Of The Lafayette River, Norfolk, Virginia, Michael J. Jugan

OES Theses and Dissertations

Three experimental tests were conducted in the Lafayette River branch of the Chesapeake Bay Hydraulic Model, each successive test with an increase in the amount of fresh water discharged into the head of the river. This was done to study the response from varying river discharge on mixing parameters including the longitudinal dispersion coefficient (E).

The model generated a tide of constant range and period. Batch releases of Rhodamine WT dye were made in the model and sampled throughout the river for ten tidal cycles. Samples were taken simultaneously at selected high and low water slack.

The calculation of the …

The Marine Geochemistry Of Selenium, Kazufumi Takayanagi

OES Theses and Dissertations

A fluorometric method for the determination of Se (IV) and total selenium in natural waters has been developed and optimized. The detection limit is about 20 pM for both analyses using a one liter sample. The precisions were about 2 % at 338 pM for Se (IV) and at 234 pM for total selenium.

The concentrations of both total selenium and Se (IV) decreased with increasing salinity in the surface waters of the James River and southern Chesapeake Bay. While total selenium seemed to exhibit conservative behavior at salinities above 0.36 ('o)/oo, Se (IV) was apparently removed during estuarine mixing. …

Early History Of The Atlantic Ocean And Gas Hydrates On The Blake Outer Ridge: Results Of The Deep Sea Drilling Project Leg 76, Robert E. Sheridan, Felix M. Gradstein, Leo A. Barnard, Deborah M. Bliefnick, Dan Habib, Peter D. Jenden, Hideo Kagami, Everly M. Keenan, John Kostecki, Keith A. Kvenvolden, Michel Moullade, James Ogg, Alastair H.F. Robertson, Peter H. Roth, Thomas H. Shipley, Larry Wells, Jay L. Bowdler, Pierre H. Cotillon, Robert B. Halley, Hajimu Kinoshita, James W. Patton, Kenneth A. Pisciotto, Isabella Premoli-Silva, Margaret M. Testarmata, Richard V. Tyson, David K. Watkins

Department of Earth and Atmospheric Sciences: Faculty Publications

Leg 76 of the Deep Sea Drilling Project achieved two major scientific objectives. The first objective was met at Site 533, where on the Blake Outer Ridge, gas hydrates were identified by geophysical, geochemical, and geological studies. Gas-hydrate decomposition produced a volumetric expansion of 20:1 of gas volume to pore-fluid volume; this expansion exceeded by about a factor of four the volume of gas that could be released from solution in pore water under similar conditions. The gas hydrate includes methane, ethane, propane, and isobutane but apparently excluded normal butane and higher molecular weight hydrocarbons as predicted from gas hydrate …

Atrazine Degradation, Sorption And Bioconcentration In Water Systems, Duane C. Wolf, Ramon L. Jackson

Arkansas Water Resources Center Technical Reports

The herbicide atrazine is used extensively to control broadleaf and grass weeds in such crops as sorghum and corn. A small portion of the atrazine may be lost from the area of application by surface runoff and could enter a stream or lake. The objective of this study was to evaluate atrazine degradation, sorption, and bioconcentration in watersediment systems. The results indicated that sediments with lower pH values and higher organic matter levels adsorbed higher levels of atrazine than sediments with neutral pH values and lower organic matter levels. Microbial decomposition of the herbicide was slow under the conditions of …

An Ecological Analysis Of Relic Diatoms In Sediments Of Las Vegas Bay, Lake Mead, David Ross Hetzel

Publications (WR)

Relic diatoms in sediments of the inner Las Vegas Bay, near the Las Vegas Wash sewage inflow, were examined in order to assess historic trophic conditions in this area of Lake Mead. Diatom sedimentation rates and ratios of Araphidineae/Centrales (A/C) diatom groups were determined from sediment cores collected in the old wash channel 1.5 km from the sewage inflow (station 2), in a small cove 1.5 km further downstream (station 3) and in an adjacent embayment off Gypsum Wash (station 4). Diatom sedimentation rates generally increased from the bottom to the top of each core, but pronounced minima existed at …

Interbasin Transfer Economics: The High Plains Region, Allen Kneese

New Sources of Water for Energy Development and Growth: Interbasin Transfers: A Short Course (Summer Conference, June 7-10)

44 pages (includes 1 map).

The Clean Water Act As A Restraint On Interbasin Transfers Of Water, Sue Ellen Harrison

New Sources of Water for Energy Development and Growth: Interbasin Transfers: A Short Course (Summer Conference, June 7-10)

44 pages.

Contains references.

Contains 1 attachment.

Petrology Of The Middle Cambrian Blacksmith Formation, North-Central Utah, Howard William Hay Jr.

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The dolostones and dolomitic limestones of the Middle Cambrian Blacksmith Formation were studied in the Bear River and Malad Ranges and the Wellsville Mountains of north-central Utah. The depositional textures and sedimentary structures retained within the rocks form the basis of subdivisions of measured sections, interpretation of depositional paleogeography, and reconstruction of environments.

Other studies of modern carbonate environments and their ancient analogues provided the basis for interpretation of the depositional textures found within the rocks of the Blacksmith Formation. Four identifiable lithofacies were recognized within the study area. These facies include: (1) oolite shoal; (2) restricted lagoon; (3) low- …

Genesis Of A Vertisol And An Associated Palexeroll In Northern Utah, Robert C. Graham

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The genetic relationship between a Vertisol and an associated Mollisol with an argillic horizon was studied. These soils are taxadjuncts of the Hawkins and Ostler series, respectively. They occur in the Wasatch Mountains of northern Utah and have similar parent materials, altitudes, and slope percentages. Ostler soils have a dense cover of Gambel oak (Quercus gambelii) and occur preferentially on north aspects. Mule's ear (Wyethia amplexicaulis) is the dominant vegetation on Hawkins soils, which are most frequent on south aspects. Erosion is prevalent on Hawkins soils because the mule's ear does not adequately cover the soil …

Innovations In Hay Harvesting And Storing, V. L. Lectenberg, D. A. Holt

Kentucky Alfalfa and Stored Forage Conference

Haymaking in the humid parts of the U.S. is the most risky operation that farmers engage in. Standing hay is extremely high in moisture and must be dried to at least 25% moisture less before it can be stored without spoilage. Most farmers rely on natural field drying processes to cure their hay. Natural drying is often slowed by high relative humidity. Rainfall frequently occurs before the hay has dried which further slows the drying process and can result in serious nutrient and yield losses. Haymaking is also a labor-intensive farming operation and, until recently, involved a large amount of …

Ground-Water Reconnaissance Of The Central Weber River Area, Morgan And Summit Counties, Utah, United States Geological Survey

All U.S. Government Documents (Utah Regional Depository)

A reconnaissance of ground water in the central Weber River area obtained data to help State administrators devise a policy for acting on applications to appropriate ground water resulting from recent and future influxes of residents.