Open Access. Powered by Scholars. Published by Universities.®
- Institution
-
- Western Michigan University (19480)
- University of Kentucky (10978)
- University of Nebraska - Lincoln (4538)
- University of South Florida (1871)
- China Coal Technology and Engineering Group (CCTEG) (1799)
-
- Department of Primary Industries and Regional Development, Western Australia (1669)
- Utah State University (1564)
- TÜBİTAK (917)
- Missouri University of Science and Technology (771)
- University of Arkansas, Fayetteville (758)
- Boise State University (667)
- Portland State University (665)
- Old Dominion University (658)
- University of Nevada, Las Vegas (521)
- University of Texas Rio Grande Valley (515)
- Montana Tech Library (496)
- Western Kentucky University (496)
- University of Colorado Law School (481)
- University of North Dakota (448)
- Louisiana State University (423)
- University of New Mexico (401)
- Montclair State University (383)
- Central Washington University (367)
- City University of New York (CUNY) (314)
- University of Texas at El Paso (305)
- University of South Carolina (275)
- Michigan Technological University (253)
- Brigham Young University (240)
- University of Texas at Arlington (237)
- University of New Hampshire (229)
- Keyword
-
- Western Australia (1183)
- Geology (900)
- Grains and field crops (625)
- Groundwater (619)
- Nebraska (589)
-
- Climate change (460)
- Grazing (407)
- Geochemistry (403)
- Soil (372)
- Hydrology (358)
- Montana (326)
- Nitrogen (323)
- Kentucky (302)
- Remote sensing (282)
- Salinity (282)
- Water quality (280)
- Drought (277)
- Utah (272)
- Water (240)
- Karst (233)
- Alfalfa (223)
- Climate (219)
- Geophysics (215)
- Hydrogeology (214)
- Phosphorus (213)
- Agriculture (203)
- Geomorphology (203)
- Irrigation (202)
- Stratigraphy (202)
- United States (191)
- Publication Year
- Publication
-
- Legacy Scout Tickets from Pure Oil Company (11044)
- IGC Proceedings (1977-2023) (9261)
- Thin Sections (6677)
- Coal Geology & Exploration (1799)
- Legacy Color Lithology Strip Logs (1152)
-
- United States Geological Survey: Staff Publications (1026)
- Turkish Journal of Earth Sciences (917)
- Conservation and Survey Division: Faculty and Staff Publications (901)
- International Journal of Speleology (888)
- Theses and Dissertations (826)
- Department of Earth and Atmospheric Sciences: Faculty Publications (670)
- Experimental Summaries - Plant Research (668)
- Masters Theses (589)
- All Graduate Theses and Dissertations, Spring 1920 to Summer 2023 (454)
- School of Earth, Environmental, & Marine Sciences Faculty Publications (424)
- Bachelors Theses and Reports, 1928 - 1970 (423)
- Faculty Publications (407)
- Geosciences Faculty Publications and Presentations (392)
- Kentucky Alfalfa and Stored Forage Conference (382)
- School of Geosciences Faculty and Staff Publications (355)
- Earth and Planetary Sciences ETDs (343)
- Dissertations and Theses (342)
- Graduate Theses and Dissertations (336)
- Electronic Theses and Dissertations (325)
- Memorandum (316)
- Resource management technical reports (315)
- Open Access Theses & Dissertations (284)
- Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works (279)
- USF Tampa Graduate Theses and Dissertations (264)
- Department of Earth and Environmental Studies Faculty Scholarship and Creative Works (262)
- Publication Type
Articles 56821 - 56850 of 59364
Full-Text Articles in Entire DC Network
An Analysis Of The Bourbeuse River As A Source Of Concrete Aggregate., David John Lexa
An Analysis Of The Bourbeuse River As A Source Of Concrete Aggregate., David John Lexa
Masters Theses
"This thesis represents a study made to evaluate the sand and gravel deposits of the Bourbeuse River as a source of concrete aggregate. The Meramec River has long been a major source of aggregate in Missouri; however, proposed dam construction will limit the quantity available for exploitation. The Bourbeuse River, a tributary of the Meramec, was chosen for evaluation as an alternate source.
The study was conducted in two parts: an estimation of available quantity; a determination of the quality of the material. Quantity of material was estimated through an analysis of drill logs, correlated with the results of basic …
Interpretation Of Imagery Lineations, Logan Creek Area, Southeast Missouri, Gregory Paul Smith
Interpretation Of Imagery Lineations, Logan Creek Area, Southeast Missouri, Gregory Paul Smith
Masters Theses
"Depletion of ore in Missouri's old lead districts and the opening of the state's new lead district adds impetus to understanding and delineating geologic structure in and adjacent to the new lead district. Image and geomorphic analysis, hydrologic data, and subsurface structural contour mapping are used in interpretation of geologic structure in Dent, Shannon, Reynolds, and Carter counties, Missouri. Unlike the time consuming surface geologic mapping, the modes of investigation used in this study enabled the writer to make a larger, regional-scale study with results comparable to those attainable by surface mapping. The area is covered by thick residual soils …
Heavy And Alkali Metal Content Of Surface And Ground Waters In The Joplin Area, Missouri., Edwin Joseph Garrison
Heavy And Alkali Metal Content Of Surface And Ground Waters In The Joplin Area, Missouri., Edwin Joseph Garrison
Masters Theses
"Over 50 water samples were collected in the fall and spring from springs, streams, lakes and selected water wells within a radius of six miles from the population center of Joplin, Missouri, which lies within the formerly active Tri-State mining district. The samples were analyzed for Ca, Mg, Na, K, Cu, Pb, Zn, Cd, Fe and Hg. Water well samples represent deep (Cambrian-Ordovician) and shallow (Mississippian) rock sources. Statistical evaluations of the data were conducted to help delineate the patterns and causes of metal variations.
The Ca, Mg, Na, K, Zn and Fe concentrations, listed in descending order of abundance, …
Barometric And Pump Test Determination Of The Characteristics Of A Carbonate Aquifer In The Vicinity Of Norman Creek, Phelps County, Missouri., Somchai Wongsawat
Barometric And Pump Test Determination Of The Characteristics Of A Carbonate Aquifer In The Vicinity Of Norman Creek, Phelps County, Missouri., Somchai Wongsawat
Masters Theses
"Carbonate rock aquifers underlie many parts of Missouri. As population and water use increase, these aquifers will increase in importance as sources of water supply. The purpose of this study is to investigate the applicability of barometric calculations and a variety of pump test evaluation equations to a shallow confined doloii mite aquifer. The aquifer is the upper Gasconade Formation of Lower Ordovician age in the vicinity of Norman Creek, south central Phelps County, Missouri.
The response of water level to atmospheric pressure showed that the carbonate aquifer in this study site has a rather high barometric efficiency (Bav …
Mercury Distribution In A Massive Sulfide Ore Deposit At Balmat, New York, David Ray Jessey
Mercury Distribution In A Massive Sulfide Ore Deposit At Balmat, New York, David Ray Jessey
Masters Theses
"Ore samples consisting of diamond drill core and mine samples, collected from several Balmat ore bodies, were analyzed for their mercury content. The average contents in these ore bodies were found, in ppb, to be: Upper Gleason, 829; Middle and Lower Gleason, 504; Loomis, 546; Fowler, 195; No. 1 Zone, 37; Sylvia Lake, 59; No. 2 Mine, 5. If all of the mercury in these pyrite-sphalerite-galena ores occurs in the sphalerite, then the average sphalerite mercury contents, in ppb, are the following: Upper Gleason, 2490; Middle and Lower Gleason, 2516; Loomis, 2701; Fowler, 1376; No.1 Zone, 384; Sylvia Lake, 408; …
A Study Of The Subsurface Stratigraphy Of The Upper Cambrian In Western Missouri, Joseph L. Thacker Jr.
A Study Of The Subsurface Stratigraphy Of The Upper Cambrian In Western Missouri, Joseph L. Thacker Jr.
Masters Theses
"Megascopic examination of diamond-drill cores supplemented by insoluble residue data provides a usable means of studying the lithologic characteristic of Upper Cambrian strata in the subsurface of western Missouri.
The stratigraphic relationships within each Cambrian formation and the relationships of each Cambrian unit to formations above and below are discussed.
The relationship of Upper Cambrian strata to the Precambrian surface in western Missouri and easternmost Kansas is illustrated. The Lamotte Sandstone is overlapped by the Reagan Sandstone against Precambrian topographic highs and the Bonneterre and lower Davis are replaced by sandstones similar to the Reagan in southwest Missouri and southeast …
Land Systems Of The Brockman River Catchments, S. Porritt
Land Systems Of The Brockman River Catchments, S. Porritt
Natural resources published reports
The survey was conducted to gain basic information about the agricultural land use of the Brockman River Catchment. The University of Western Australia Faculty of Agriculture was interested in the area as a compact, agriculturally diverse area close to Perth which was, therefore, suitable for filed studies. The Department of Agriculture, Moora Office was interested in this study as a framework within which to improve its extension services in the area.
Both parties cooperated in investigations of the area by providing data and equipment. Field work was carried out in summer 1973-74 and data compiled by an agricultural science student …
Coexisting Actinolite And Hornblende From West-Central New Hampshire, John B. Brady
Coexisting Actinolite And Hornblende From West-Central New Hampshire, John B. Brady
Geosciences: Faculty Publications
The coexistence of actinolite and hornblende and of cummingtonite and hornblende has been observed in garnet-zone and staurolite-kyanite-zone amphibolites of the Ammonoosuc Volcanics near Hanover, New Hampshire. The amphibole pairs occur both as separate grains and as intergrowths with boundaries that are optically and chemically sharp, but geometrically irregular; no exsolution lamellae were observed.Electron microprobe analyses of the amphibole pairs show that: (1) hornblende is richer in Al, Na, K, Ti, and Fea+,and has a lower Mg/(Me f Fe) ratio than the coexisting actinolite; (2) hornblende is enriched in Al, Na, and Ca, but has a similar Mel(Mg f Fe) …
La Deriva De Los Continentes, Aldemaro Romero Jr.
La Deriva De Los Continentes, Aldemaro Romero Jr.
Publications and Research
No abstract provided.
A Mechanical Well Log Study Of The Popular Interval Of The Mississippian Madison Formation In North Dakota, C. W. Cook
A Mechanical Well Log Study Of The Popular Interval Of The Mississippian Madison Formation In North Dakota, C. W. Cook
Theses and Dissertations
The Poplar interval of interbedded evaporites and carbonates forms the uppermost part of the Mississippian Madison Forr.1ation in western North Dakota. A detailed mechanical well log study of the Poplar interval in North Dakota was conducted to interpret the Poplar's regional geology and to attempt to locate areas with potential for petroleum production. Limestone, dolomite, anhydrite and salt were differentiated using mechanical well logs.
The complex facies of the Madison are subdivided into para-time rock units (the Poplar interval is one) on the basis of extensive thin anhydrite beds which are considered time-parallel.
The base of the Poplar interval is …
Glacial Deposits, Vol. 2, 1973-1974, Department Of Geography-Geology
Glacial Deposits, Vol. 2, 1973-1974, Department Of Geography-Geology
Glacial Deposits
Newsletter of the Department of Geography-Geology
1974 Potassium Soil Test Calibration Trials 1. Soil Analysis, W. J. Cox
1974 Potassium Soil Test Calibration Trials 1. Soil Analysis, W. J. Cox
Experimental Summaries - Plant Research
Site details - 74AL1, 74AL2, 74DE1, 74DE2, 73DE3, 73DE4, 73DE5, 73DE6, 74MA1, 74MA2, 74MA3, 74BU1, 74BU2, 74BU3, 74BU4, 74BY1, 74BY2, 74BY3, 74HA1, 74HA2, 74HA3, 74AR1, 74AR2, 74M01, 74M02, 74M03, 74NA1, 74NA2. 1974 Soil analyses. I. % Gravel, bulk density and ph measurements. I (a) Moisture characteristics. II. Measures of Available potassium. III. CSBP results.
Summary Of 1974 Phosphorus And Sulphur Group, J W. Bowden, B. Scurr, R Lunt
Summary Of 1974 Phosphorus And Sulphur Group, J W. Bowden, B. Scurr, R Lunt
Experimental Summaries - Plant Research
Stocking x Super Rate - Merredin - 66M30. Twitcham - 62MB9. Kojonup - 68BR7. Maintenance P x S Trials - I. Residual Value - 66N07 and 66ME3. II. Wheatbelt Rate Trials - 67N011, 66LG1, 68LG1, 67NO5, 6NA3, 67GE2, 66M06 and 67M01. III. Wheatbelt Research Stations and Farmers- 65C5, 65A1, 65N5,69WH15 and 66N09. IV. Higher Rainfall Area Trials - 68B1, 68BU2, 68BR5,68AL3, 69E6, 69AL2 and 69AL3. Miscellaneous Trials - 74GE2, 74GE4, 74GE5,74JE3, 74LG4, 74M06, 74M07, 74TS3, 74NA3 74NA4, 74M07, 74TS4.
Interim Summary 1974 Experiments, M L. Poole
Interim Summary 1974 Experiments, M L. Poole
Experimental Summaries - Plant Research
Data presented for: 74MT38 - Variety Trial - New rape and radish varieties 74MT27 - Rates of seed, time of planting on Crambe abyssinica 74GE'1 ·- Time of Seeding X Rate of Nitrogen on Sunflowers. Oilseed and Grain Legumes under Summer Irrigation. Sunflower Progress Report. Safflower Progress Report. Response of Oilseed Crops to Climate. Introduction - The results given in this report provide an interim record of 1974 experimental work with oilseed crops. An essential part of oilseed trial programme is an evaluation of the quantity and quality of oil produced by different species and varieties under a range of …
Summary Of Experimental Work 1974, G Walton
Summary Of Experimental Work 1974, G Walton
Experimental Summaries - Plant Research
Lupinus albus cv WB2: Maximum yield response to 36 plants/m2 at Avondale (1973 and 1974) and Mt Barker Research Station in 1973 (achieved with 180 to 200 kg/ha seed rate), Maximum yield response to 48 plants/m2 at Chapman 1973 and 1974 and at Eradu 1974 (achieved with 220 tG 240 kg/ha). Very good yield results: Season - site Avondale 1973-3300, 1974-2250. kg/ha Chapman 1973-2800, 1974-2400. Mt Barker 1973-1900. 74A2 - Rates Of seeding for L, albus cv WB2. 74A21 - Rates of super on two lupin varieties. 74BR1 - Pasture regeneration after lupin survey. 74C4 - Rates of seeding L. …
1974 Potash Trials 2. Yield Data, W. J. Cox
1974 Potash Trials 2. Yield Data, W. J. Cox
Experimental Summaries - Plant Research
Experiment nos: 74AL1, 74AL2, 74AR1, 74AR2,74BU1, 74BU2, 74BU3, 74BU4, 74BY1, 74 BY2, 74BY3, 74DE1, 74DE2, 74DE3, 74DE4, 74DE5, 74DE6, 74HA1, 74HA2, 74HA3, 74MA1, 74MA2, 74MA3, 74MO1, 74MO2, 74MO3, 74NA1, 74NA2.
Dairying In W.A., Department Of Agriculture And Food, Western Australia
Dairying In W.A., Department Of Agriculture And Food, Western Australia
Bulletins - 3000 - 3999
Western Australia has a small dairy industry compared with its other rural production. However, the industry has consolidated over recent years.Tree clearing and pasture development on existing holdings and the amalgamation of small dairy farms has led to a rapid increase in the area of pasture per farm. The trend in Western Australia is towards bigger herds, more efficient dairies, more fodder conservation and increasing production per cow and per hectare. Commercial dairy farming in Western Australia is confined to the south-western corner of the State, south of Perth, extending in a 50-kilometre-wide strip along the coast to 50 kilometres …
1974 The Ecology And Control Of Doublegee (Emex Australis) And Emex Spinosa, D J. Gilbey
1974 The Ecology And Control Of Doublegee (Emex Australis) And Emex Spinosa, D J. Gilbey
Experimental Summaries - Plant Research
The objectives of the field experimental programme for 1974 were to - 1) Evaluate a technique to measure pasture loss as a result of doublegee infestation at Merredin, Wongan.Hills and Chapman. 2) Evaluate the effect of cultural and herbicide treatment combinations on the magnitude and distribution of viable doublegee seeds in the soil at Avondale, Merredin, Wongan Hills and Chapman. 3) Measure the magnitude and distribution of viable doublegee seeds in the soil from paddocks representing each year of a two crop, plus three year pastureley rotation at Avondale, Merredin, Wongan Hills and Chapman. 4) Screen herbicides for selective control …
Fallow Re-Assessment - Wheat Variety Investigations- Root Growth And Moisture Use, D Tennant
Fallow Re-Assessment - Wheat Variety Investigations- Root Growth And Moisture Use, D Tennant
Experimental Summaries - Plant Research
This report summarises progress and data available for the following investigations - Fallow Re-assessment - 72M29. Wheat Variety Investigations - Root Growth and Moisture Use. Location: Wongan Hills Research Station. Merredin Research Station.
Lupin Agronomy: Time Of Planting, Seeding Rate And Variety In A Long Season Area., M. W. Perry
Lupin Agronomy: Time Of Planting, Seeding Rate And Variety In A Long Season Area., M. W. Perry
Experimental Summaries - Plant Research
To evaluate lupin varieties and agronomic practices in a long season district using a factorial experimental design. 74A16a Location - Warriup 57 km E. of .Albany. 74A16b Green Range, 70 km E. of Albany. Time of Planting (4) Seeding Rates (4) Varieties (4) Fertiliser.
Guidebook To The 1974 Spring Field Trip Of The Nebraska Geological Society, G.R. Svoboda
Guidebook To The 1974 Spring Field Trip Of The Nebraska Geological Society, G.R. Svoboda
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Spotlight On Mineral Stamps, R. R. Burchett
Spotlight On Mineral Stamps, R. R. Burchett
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Geology Tour Of Lancaster County, Nebraska
Geology Tour Of Lancaster County, Nebraska
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Pesticide Effects In A Simulated Soil Ecosystem, Raymond J. Samp
Pesticide Effects In A Simulated Soil Ecosystem, Raymond J. Samp
Masters Theses
The screening of pesticides to determine which were most inhibitory to bacteria was accomplished by testing the effects of 10 pesticides on 9 different organisms using the disk assay method. Results showed that Gram positive bacteria were more sensitive to all pesticides tested than were the Gram negative bacteria. In addition, the hormone herbicides were found to be the most inhibitory to these bacteria and 2,4-D (2,4-dichlorophenoxyacetic acid), a hormone herbicide, was chosen for subsequent in vivo studies.
A soil perfusion apparatus was used to determine the effects of 2,4-D in a typical soil ecosystem. Bacterial plate counts and nutrient …
Conodonts Of The Mecca Quarry Shale, Timothy Charles O'Neill
Conodonts Of The Mecca Quarry Shale, Timothy Charles O'Neill
Masters Theses
Conodonts were found to be abundant in the Middle Pennsylvanian, Mecca Quarry Shale, Parke County, Indiana. Nine forms were identified in this black fissile shale from a locality along Montgomery Creek near the town of Mecca. These elements are: Hindeodella parva, Idiognathodus delacatus, Gondolella sp. a, Ozarkodina delacatula, Lonchodina clarki, Ligonodina typa, Lonchodus simplex, Metalonchodina bidentata, and Neoprioniodus conjunctus.
Ratios of elements to each other were determined and used to arrive at an idea of what conodont assemblages were present. At least three asemblages are presented; Scottognathus, Duboisella, and Illinella …
Paleontology Of Brackish-Water Faunas In Two Tongues Of The Cannonball Formation (Paleocene, Danian), Slope And Golden Valley Counties, Southwestern North Dakota, James B. Van Alstine
Paleontology Of Brackish-Water Faunas In Two Tongues Of The Cannonball Formation (Paleocene, Danian), Slope And Golden Valley Counties, Southwestern North Dakota, James B. Van Alstine
Theses and Dissertations
In June and July, 1972, four stratigraphic sections were mea sured and described in Slope and Golden Valley Counties, southwestern North Dakota. Within the sections, the Cannonball and Ludlow Formations are recognized. The Cannonball consists of two tongues in the upper part of the Ludlow (perhaps equivalent to the Lebo Member), separated stratigraphically by about 30 roof Ludlow. The U tongue (upper tongue in the study area) is up to 11. 7 m thick. The L tongue (lower tongue. in the study area) is up to 3.8 m thick. The Cannonball is composed mostly of mudstones and the Ludlow consists …
A New Centromerus From Bulgarian Caves (Araneae, Linyphiidae), Christo Deltshev
A New Centromerus From Bulgarian Caves (Araneae, Linyphiidae), Christo Deltshev
International Journal of Speleology
A new species, Centromerus milleri, is described, which was collected in the cave “Karangil” near the town of Kardjali, Bulgaria. Centromerus milleri n. sp. belongs to the group of C. pabulator.
Momonisia Phreatica N. Gen., N. Sp. (Momoniidae, Hydrachnellae) Des Eaux Souterraines De Bulgarie, A. Petrova
Momonisia Phreatica N. Gen., N. Sp. (Momoniidae, Hydrachnellae) Des Eaux Souterraines De Bulgarie, A. Petrova
International Journal of Speleology
Recent borings in the Veleka River drainage area (South Eastern Bulgaria) have shown a phreatic fauna with a new representative of Hydracarian of the family Momoniidae which constitute the type of a new genus: Momonisia phreatica n. gen. n. sp. The description is here given by the author. The most closely related Momoniid appears to be Momonia karelica Sokolov from Russian Carelia.
Données Faunistiques Et Ecologiques Sur Les Stenasellidae (Crustacea Isopoda Asellota Des Eaux Souterraines), Guy Magniez
Données Faunistiques Et Ecologiques Sur Les Stenasellidae (Crustacea Isopoda Asellota Des Eaux Souterraines), Guy Magniez
International Journal of Speleology
Some important morphological features, which are discussed here, point out that the Stenasellids (Crustacea Isopoda Asellota) must be considered as a true family (Stenasellidae), independent from the Asellidae. A definition and a renewed diagnosis of the Stenasellidae Dudich, 1924, are given. Their relationships must be pursued, especially in the marine Parastenetroidea and in the psammic Microcerberidae. Until 1938, the group was known only from subterranean waters of southern Europe. Now, several genera and many thermophile species from north-tropical underground waters have been discovered in Africa (5 gen., 12 sp.), Asia (1 gen., 2 sp.) …
Biology And Ecology Of The El Convento Cave-Spring System (Puerto Rico), G. Nicholas
Biology And Ecology Of The El Convento Cave-Spring System (Puerto Rico), G. Nicholas
International Journal of Speleology
The El Convento Cave-Spring System is located at the head of the Quebrada de Los Cedros, approximately 20 km. west of Ponce, southwestern Puerto Rico. Although situated in an arid environment, the gorge receives sufficient moisture from the cave-spring system to support an abundant flora, with Bucida buceras and Bursera simaruba as the dominant trees. The cave is frequently flooded and possesses a rich nutrient substrate in the form of bat guano. Numerous orthopterans (Aspiduchus cavernicola and Amphiacusta annulipes), decapoda (Macrobrachium carcinus and Epilobocera sinuatifrons), and chiroptera (Brachyphylla cavernarum and Artebius jamaicensis) are present. …