Open Access. Powered by Scholars. Published by Universities.®
- Institution
-
- Western Michigan University (19480)
- University of Kentucky (10980)
- University of Nebraska - Lincoln (4538)
- University of South Florida (1880)
- China Coal Technology and Engineering Group (CCTEG) (1822)
-
- Department of Primary Industries and Regional Development, Western Australia (1674)
- Utah State University (1564)
- TÜBİTAK (917)
- Missouri University of Science and Technology (782)
- University of Arkansas, Fayetteville (765)
- Portland State University (671)
- Boise State University (667)
- Old Dominion University (663)
- University of Nevada, Las Vegas (521)
- University of Texas Rio Grande Valley (520)
- Montana Tech Library (496)
- Western Kentucky University (496)
- University of Colorado Law School (481)
- University of North Dakota (448)
- Louisiana State University (426)
- University of New Mexico (402)
- Montclair State University (386)
- Central Washington University (368)
- City University of New York (CUNY) (315)
- University of Texas at El Paso (315)
- University of South Carolina (280)
- Michigan Technological University (254)
- Brigham Young University (240)
- University of Texas at Arlington (237)
- University of New Hampshire (230)
- Keyword
-
- Western Australia (1183)
- Geology (902)
- Grains and field crops (625)
- Groundwater (621)
- Nebraska (589)
-
- Climate change (464)
- Grazing (407)
- Geochemistry (403)
- Soil (372)
- Hydrology (358)
- Montana (326)
- Nitrogen (323)
- Kentucky (302)
- Remote sensing (283)
- Salinity (282)
- Water quality (281)
- Drought (277)
- Utah (272)
- Water (240)
- Karst (233)
- Geophysics (228)
- Alfalfa (223)
- Climate (219)
- Hydrogeology (215)
- Phosphorus (213)
- Geomorphology (205)
- Stratigraphy (205)
- Agriculture (204)
- Irrigation (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 (1822)
- 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 (889)
- Theses and Dissertations (835)
- Department of Earth and Atmospheric Sciences: Faculty Publications (670)
- Experimental Summaries - Plant Research (668)
- Masters Theses (591)
- All Graduate Theses and Dissertations, Spring 1920 to Summer 2023 (453)
- School of Earth, Environmental, & Marine Sciences Faculty Publications (429)
- Bachelors Theses and Reports, 1928 - 1970 (423)
- Geosciences Faculty Publications and Presentations (395)
- Faculty Publications (383)
- Kentucky Alfalfa and Stored Forage Conference (382)
- School of Geosciences Faculty and Staff Publications (355)
- Dissertations and Theses (343)
- Earth and Planetary Sciences ETDs (343)
- Graduate Theses and Dissertations (339)
- Electronic Theses and Dissertations (325)
- Memorandum (316)
- Resource management technical reports (315)
- Open Access Theses & Dissertations (294)
- Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works (280)
- USF Tampa Graduate Theses and Dissertations (272)
- Department of Earth and Environmental Studies Faculty Scholarship and Creative Works (265)
- Publication Type
Articles 57271 - 57300 of 59532
Full-Text Articles in Entire DC Network
Eutrophication Factors In North Central Florida Lakes, H. D. Putnam, Patrick L. Brezonik, Earl E. Shannon
Eutrophication Factors In North Central Florida Lakes, H. D. Putnam, Patrick L. Brezonik, Earl E. Shannon
United States Environmental Protection Agency: Publications
A small Florida lake has been receiving a regimen of nutrient addition equivalent to 500 mg/m3-yr N and 43 mg/m3-yr P since 1967. Data has been accumulated through 1969. The effect on the lacustrine ecosystem of various biogenes includes production by primary producers, species diversity of plankton and certain production estimates at the secondary trophic level using natural populations of planktivorous fish. Plankton production using isotopic carbon is ca. 58 grms/m2-yr; Species diversity is slowly changing to a mixed chlorophycean and yellow-green. Biomass of benthic green filamentous types has increased slightly. Nutrient addition has …
Upper Pennsylvanian Shoreline Deposits Form Iowa And Nebraska: Their Recognition, Variation, And Significance, J. A. Fagerstrom, R. R. Burchett
Upper Pennsylvanian Shoreline Deposits Form Iowa And Nebraska: Their Recognition, Variation, And Significance, J. A. Fagerstrom, R. R. Burchett
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Catechol Effected Dissolution Of Silicate Minerals, James Maurice Kelley
Catechol Effected Dissolution Of Silicate Minerals, James Maurice Kelley
Dissertations and Theses
The chemical properties of guanidinium tris(catecholato)siliconate, [(H₂N)₂C=NH₂]₂[Si(C₆H₄O₂)₃]·XH₂O (0 < X < 1), precipitated from an ammoniacal solution of silica and catechol by adding guanidinium hydrochloride, (H₂N)₂C=NH·HC1, were studied, and infrared, nmr, x-ray powder diffraction, and analytical data were gathered.
This same compound was, upon addition of' (H₂N)₂C=NH·HC1, isolated from 0.25, M aqueous catechol solutions buffered at pH 10 and containing the silicate minerals albite, andradite, muscovite, pyrophyllite, talc, and wollastonite, and also from unbuffered catechol solutions containing wollastonite and andradite.
It is concluded from this work that the formation of an anionic catechol-silicon complex, Si(C₆H₄O₂)₃²⁻, is largely responsible for the dissolution of the minerals mentioned above. From this conclusion, it is proposed that naturally occurring members of the class of organic compounds to which catechol belongs, the aromatic v̲i̲̲c̲-diols, may play …
Standing Crop And Productivity Of Marsh Vegetation At Saratoga Springs, California, W. G. Bradley
Standing Crop And Productivity Of Marsh Vegetation At Saratoga Springs, California, W. G. Bradley
Memorandum
No abstract provided.
Application Of Remote Sensing Techniques For Analysis Of Desert Biome Validation Studies, Paul T. Tueller, Garwin Lorain
Application Of Remote Sensing Techniques For Analysis Of Desert Biome Validation Studies, Paul T. Tueller, Garwin Lorain
Memorandum
No abstract provided.
Seasonal Use Of Soil Moisture By Mature Velvet Mesquite, Dwight R. Cable
Seasonal Use Of Soil Moisture By Mature Velvet Mesquite, Dwight R. Cable
Memorandum
No abstract provided.
Ingestion Rates, Live Weight Caloric Densities And Standing Crop Estimates For Desert Biome Rodents, R. K. Schreiber, D. R. Johnson
Ingestion Rates, Live Weight Caloric Densities And Standing Crop Estimates For Desert Biome Rodents, R. K. Schreiber, D. R. Johnson
Memorandum
No abstract provided.
Life History And Life Process Studies Of The Water Scavenger Beetle, Hydrophilus Triangularie Say, M. D. Hallmark, C. R. Ward
Life History And Life Process Studies Of The Water Scavenger Beetle, Hydrophilus Triangularie Say, M. D. Hallmark, C. R. Ward
Memorandum
No abstract provided.
Demography And Role Of Herbivorous Ants In A Desert Ecosystem As Functions Of Vegetation, Soil And Climate Variables, W. G. Whiteford, G. Ettershank
Demography And Role Of Herbivorous Ants In A Desert Ecosystem As Functions Of Vegetation, Soil And Climate Variables, W. G. Whiteford, G. Ettershank
Memorandum
No abstract provided.
The Geology Of The Southeast Quarter Of The Bone Mountain Quadrangle, Oregon, Richard Cortland Kent
The Geology Of The Southeast Quarter Of The Bone Mountain Quadrangle, Oregon, Richard Cortland Kent
Dissertations and Theses
This thesis is a study of the geology of the southeast quarter of the Bone Mountain Quadrangle. The bedrock geology mapped includes about 56 square miles.The Klamath Mountain and Coast Range Provinces of southwestern Oregon are represented in the area. Rocks in the area include the Rogue, Dothan Riddle, Days Creek, upper member of the Umpqua and Tyee Formations. The ages of these rocks range from Late Jurassic to middle Eocene. Late Jurassic ultramafic and mafic intrusive rocks associated with the Rogue Formation occur in the Klamath Province. The metavolcanics of the Rogue Format ion and an associated linear belt …
Radiative Environment And The Surface Temperature On A Microscale In A Sagebrush Biome, Inge Dirmhirn
Radiative Environment And The Surface Temperature On A Microscale In A Sagebrush Biome, Inge Dirmhirn
Memorandum
No abstract provided.
Gaseous Losses Of Nitrogen From The Soil Of Semi-Arid Regions, T. C. Tucker, R. L. Westerman
Gaseous Losses Of Nitrogen From The Soil Of Semi-Arid Regions, T. C. Tucker, R. L. Westerman
Memorandum
No abstract provided.
Role Of Algae In Crust Formation And Nitrogen Cycling In Desert Soils, Raymond I. Lynn, Roy E. Cameron
Role Of Algae In Crust Formation And Nitrogen Cycling In Desert Soils, Raymond I. Lynn, Roy E. Cameron
Memorandum
No abstract provided.
Assimilation, Metabolism And Growth Of Utah Chub, Gila Artaria, F. C. Cheng, R. L. Wallace, T. C. Bjornn, C. Macphee
Assimilation, Metabolism And Growth Of Utah Chub, Gila Artaria, F. C. Cheng, R. L. Wallace, T. C. Bjornn, C. Macphee
Memorandum
No abstract provided.
Validation Studies And Bacterial Mineralization Of Organic Carbon At Locomotive Springs, J. Anne Holman, F. W. Post, I. Walkiw
Validation Studies And Bacterial Mineralization Of Organic Carbon At Locomotive Springs, J. Anne Holman, F. W. Post, I. Walkiw
Memorandum
No abstract provided.
Curlew Valley Validation Site Report, David F. Balph
Tucson Validation Sites Report, John L. Thames
Rock Valley Validation Site Report, Frederick B. Turner
Rock Valley Validation Site Report, Frederick B. Turner
Memorandum
No abstract provided.
Gas Exchange And Productivity For Opuntia Spp., I. P. Ting, H. B. Johnson, S. R. Szarek, G. D. Brum
Gas Exchange And Productivity For Opuntia Spp., I. P. Ting, H. B. Johnson, S. R. Szarek, G. D. Brum
Memorandum
No abstract provided.
Productivity And Water Stress In Cacti, Duncan T. Patten
Productivity And Water Stress In Cacti, Duncan T. Patten
Memorandum
No abstract provided.
Rate Of Transport Of Photosynthate To Root Systems Of Desert Shrubs, A. Wallace, S. Bamberg
Rate Of Transport Of Photosynthate To Root Systems Of Desert Shrubs, A. Wallace, S. Bamberg
Memorandum
No abstract provided.
Biomass And Nutrient Dynamics Of Some Major Cold Desert Shrubs, Neil E. West
Biomass And Nutrient Dynamics Of Some Major Cold Desert Shrubs, Neil E. West
Memorandum
No abstract provided.
Water Balance Techniques I. Sampling Soil Moisture Changes Ii. Channel Transmission Losses, T. Sammis, H. Qashu, J. Ryan, J. Thames
Water Balance Techniques I. Sampling Soil Moisture Changes Ii. Channel Transmission Losses, T. Sammis, H. Qashu, J. Ryan, J. Thames
Memorandum
No abstract provided.
Biology Of Nematodes In Desert Ecosystems, R. Mankau, S. A. Sher
Biology Of Nematodes In Desert Ecosystems, R. Mankau, S. A. Sher
Memorandum
No abstract provided.
Development Of Techniques For Estimating Biomass Of Desert Inhabiting Invertebrate Animals, G. L. Bender, J. Macmahon, S. Szerlip
Development Of Techniques For Estimating Biomass Of Desert Inhabiting Invertebrate Animals, G. L. Bender, J. Macmahon, S. Szerlip
Memorandum
No abstract provided.
Evaluation Of Trap Stimulus In Relation To Probability Of Rodent Capture, D. F. Balph, R. D. Anderson
Evaluation Of Trap Stimulus In Relation To Probability Of Rodent Capture, D. F. Balph, R. D. Anderson
Memorandum
No abstract provided.
Evaluation Of Techniques For Estimating Population Sizes Of Desert Rodents, C. D. Jorgensen, H. D. Smith, D. T. Scott
Evaluation Of Techniques For Estimating Population Sizes Of Desert Rodents, C. D. Jorgensen, H. D. Smith, D. T. Scott
Memorandum
No abstract provided.
Diets, Food Preferences, And Reproductive Cycles Of Some Desert Rodents, R. P. Balda, G. C. Bateman, T. A. Vaughan
Diets, Food Preferences, And Reproductive Cycles Of Some Desert Rodents, R. P. Balda, G. C. Bateman, T. A. Vaughan
Memorandum
No abstract provided.
Food Habits Of Northern Rodents And Jackrabbits, W. E. Saul
Food Habits Of Northern Rodents And Jackrabbits, W. E. Saul
Memorandum
No abstract provided.
Population Studies Of Desert Cottontail, Black-Tailed Jackrabbit And Allen's Jackrabbit In The Sonoran Desert, C. R. Hungerford, C. H. Lowe, J. P. Gray
Population Studies Of Desert Cottontail, Black-Tailed Jackrabbit And Allen's Jackrabbit In The Sonoran Desert, C. R. Hungerford, C. H. Lowe, J. P. Gray
Memorandum
No abstract provided.