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

Earth Sciences Commons

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

27,129 Full-Text Articles 40,318 Authors 4,324,221 Downloads 239 Institutions

All Articles in Earth Sciences

Faceted Search

27,129 full-text articles. Page 1 of 653.

Corn And Soybean Response To Wastewater-Recycled Phosphorus Fertilizers, Shane Ylagan 2020 University of Arkansas, Fayetteville

Corn And Soybean Response To Wastewater-Recycled Phosphorus Fertilizers, Shane Ylagan

Crop, Soil and Environmental Sciences Undergraduate Honors Theses

The ability to recycle phosphorus (P) from wastewaters could provide a sustainable, continuous source of P that might also help protect surface water quality from P enrichment. The mineral struvite (MgNH4PO4·6H2O) is an understudied material that can be created from Pcontaining wastewater and has been shown to have agricultural fertilizer value. The objective of this study was to evaluate the effects of electrochemically precipitated struvite (ECST), chemically precipitated struvite (Crystal Green; CG), diammonium phosphate (DAP), monoammonium phosphate (MAP), rock phosphate (RP), and triple super phosphate (TSP) on corn (Zea mays) and soybean (Glycine max) response in a 79-day greenhouse ...


Boron In The Pariette Wetlands, Uinta Basin, Ut, Palak Vasudeva 2020 Utah State University

Boron In The Pariette Wetlands, Uinta Basin, Ut, Palak Vasudeva

All Graduate Theses and Dissertations

Boron is a naturally occurring mineral in shale and coal beds formed in marine environments, as found in the Uinta Basin. Mining activity and the application of excess irrigation water on agricultural lands in the Pariette watershed lead to mobilization of B via surface run off. Water quality monitoring records from 2006- 2009 reported violations of Utah B standard for irrigation water 43-100% of the time, for water flowing through the Pariette Wetlands. This study aims to determine B distribution in abiotic (water, sediments) and biotic samples (macroinvertebrates, aquatic vegetation, fish, bird eggs), and to establish correlations between B concentrations ...


Effect Of Plant Derived Tannins On Nitrogen And Carbon Cycling In Pasture Soils, Kathryn A. Slebodnik 2020 Utah State University

Effect Of Plant Derived Tannins On Nitrogen And Carbon Cycling In Pasture Soils, Kathryn A. Slebodnik

All Graduate Theses and Dissertations

Pasture-finished beef has become increasingly popular, but nitrogen losses from these pastures are of concern. Legumes containing condensed tannins such as birdsfoot trefoil (Lotus corniculatus) and sainfoin (Onobrychis viciifolia) may serve as environmentally and economically viable alternative forages in pasture finishing systems while reducing soil nitrogen loss. The goal of this project was to understand how tannin type and concentration affects soil nitrogen cycling both in the lab and the field. This thesis: 1) compared the physical, chemical, and biological characteristics of soil samples obtained from grazed grass and tannin and non-tannin containing legume pastures, 2) assessed how feces from ...


Soil Health Assessment On Arid Rangeland Soils Impacted By Oil And Gas Exploration, Development, And Extraction, Justin Allred 2020 Utah State University

Soil Health Assessment On Arid Rangeland Soils Impacted By Oil And Gas Exploration, Development, And Extraction, Justin Allred

All Graduate Theses and Dissertations

Oil and gas well pad reclamation in arid environments such as in the Uinta Basin of Utah, presents unique challenges, including remote locations, limited water, and elevated soil salinity and sodicity. Successfully reclaimed Plugged and Abandoned (P&A) well pads should resemble the surrounding rangeland once fully reclaimed. Revegetation of native species is the primary indicator of successful reclamation, but the lack of water makes it challenging to re-seed native plants, while trying to prevent the encroachment of invasive plant species such as Bromus tectorum (cheatgrass), Salsola tragus (Russian thistle), and Halogeton glomeratus (halogeton). Could successful reclamation be reflective of ...


Paleoenvironmental Reconstruction Of Quaternary Saltville, Virginia, Using Ostracode Autecology, Austin Gause 2020 East Tennessee State University

Paleoenvironmental Reconstruction Of Quaternary Saltville, Virginia, Using Ostracode Autecology, Austin Gause

Electronic Theses and Dissertations

The Saltville valley in southwestern Virginia is home to Quaternary localities containing paleontological and archaeological remains. Historically the valley has been mined for salt and the small lakes, ponds and springs along the valley floor have a brackish signature. A preliminary report on the site’s ostracode fauna suggested that the site’s water was not always saline. This study analyzed modern and Quaternary ostracodes to understand the valley’s hydrologic and chemical evolution. Sediments contained primarily freshwater species, including the environmentally sensitive Candona crogmaniana. The presence of Pelocypris tuberculatum and a new Fabaeformiscandona species throughout a vertical section spanning ...


Does Updating Natural Hazard Maps To Reflect Best Practices Increase Viewer Comprehension Of Risk?, Carson C. MacPherson-Krutsky, Brittany D. Brand, Michael K. Lindell 2020 Boise State University

Does Updating Natural Hazard Maps To Reflect Best Practices Increase Viewer Comprehension Of Risk?, Carson C. Macpherson-Krutsky, Brittany D. Brand, Michael K. Lindell

Geosciences Faculty Publications and Presentations

In this study, we examine whether updating an interactive hazard map using recommendations from the literature improves user map comprehension. Analyses of experimental data collected from 75 university students revealed that map comprehension scores were not significantly better for those who viewed a “best practices” map compared to those who viewed an existing version. This may be because the existing map was itself better than most other interactive maps. Additionally, we found map comprehension levels to have significant positive relationships with objective tests, but not self-reported measures of spatial ability. Moreover, self-reported spatial ability had statistically significant, but only moderately ...


When An Introduced Pasture Grass Becomes A Conservation Threat: Managing Buffel Grass In The Rangelands Of Australia, Margaret H. Friedel 2020 CSIRO, Australia

When An Introduced Pasture Grass Becomes A Conservation Threat: Managing Buffel Grass In The Rangelands Of Australia, Margaret H. Friedel

International Grassland Congress Proceedings

No abstract provided.


Effects Of 10 Years Of Fire And Climate Variability On Perennial Grass Cover In Shortgrass Steppe, P. L. Ford 2020 U.S. Department of Agriculture

Effects Of 10 Years Of Fire And Climate Variability On Perennial Grass Cover In Shortgrass Steppe, P. L. Ford

International Grassland Congress Proceedings

No abstract provided.


Unravelling The Mechanisms Behind The Invasion Of An Introduced And Now Undesirable Grass Species, Jennifer Firn, Yvonne Buckley 2020 The University of Queensland, Australia

Unravelling The Mechanisms Behind The Invasion Of An Introduced And Now Undesirable Grass Species, Jennifer Firn, Yvonne Buckley

International Grassland Congress Proceedings

No abstract provided.


Botanical Composition Of A Phalaris-Dominant Pasture 5 Years After The Introduction Of Intensive Rotational Grazing, Nicholas J. Edwards, K. Copping, K. Holberton, P. Wijnands 2020 Struan Agricultural Centre, Australia

Botanical Composition Of A Phalaris-Dominant Pasture 5 Years After The Introduction Of Intensive Rotational Grazing, Nicholas J. Edwards, K. Copping, K. Holberton, P. Wijnands

International Grassland Congress Proceedings

No abstract provided.


Modeling The Growth Of Alfalfa (Medicago Sativa) In The Pampas Region, M. Druille, M. F. Garbulsky, V. A. Deregibus 2020 Universidad de Buenos Aries, Argentina

Modeling The Growth Of Alfalfa (Medicago Sativa) In The Pampas Region, M. Druille, M. F. Garbulsky, V. A. Deregibus

International Grassland Congress Proceedings

No abstract provided.


Central Afghanistan Rangelands, Daniel G. Robinett 2020 Robinett Rangeland Resources L.L.C.

Central Afghanistan Rangelands, Daniel G. Robinett

International Grassland Congress Proceedings

No abstract provided.


Controls Of Seeding Recruitment Of Annual Species In Temperate Perennial Pastures, P. Cornaglia, M. P. Clavijo, H. Harkes, Ayala Torales 2020 Universidad de Buenos Aires, Argentina

Controls Of Seeding Recruitment Of Annual Species In Temperate Perennial Pastures, P. Cornaglia, M. P. Clavijo, H. Harkes, Ayala Torales

International Grassland Congress Proceedings

No abstract provided.


Grassland Diversity Enhances Productivity At Low And High Levels Of Nitrogen Addition, Tim Carnus, J. A. Finn, Laura Kirwan, A. Cuddihy, J. Connolly 2020 Teagasc Environment Research Centre, Ireland

Grassland Diversity Enhances Productivity At Low And High Levels Of Nitrogen Addition, Tim Carnus, J. A. Finn, Laura Kirwan, A. Cuddihy, J. Connolly

International Grassland Congress Proceedings

No abstract provided.


Dynamics Of 4-Species Plant Systems Over Three Years At 19 Sites Across Europe, Caroline Brophy, J. Connolly, Laura Kirwan, J. A. Finn, A. Lüscher, T. Sebastia, R. Collins, C. Porqueddu, A. Helgadottir 2020 University College Dublin, Ireland

Dynamics Of 4-Species Plant Systems Over Three Years At 19 Sites Across Europe, Caroline Brophy, J. Connolly, Laura Kirwan, J. A. Finn, A. Lüscher, T. Sebastia, R. Collins, C. Porqueddu, A. Helgadottir

International Grassland Congress Proceedings

No abstract provided.


Classification Of Rangeland Vegetation And Modeling Of Vegetation Patterns At The Jabal Al Akhdar Moutain, Northern Oman, K. Brinkmann, U. Dickhoefer, E. Schlecht, A. Buerkert 2020 University of Kassel, Germany

Classification Of Rangeland Vegetation And Modeling Of Vegetation Patterns At The Jabal Al Akhdar Moutain, Northern Oman, K. Brinkmann, U. Dickhoefer, E. Schlecht, A. Buerkert

International Grassland Congress Proceedings

No abstract provided.


Growth Parameters Of Forages In A Cool Semi‐Arid Climate, Shabtai Bittman, D. H. McCartney, F. C. Stevenson 2020 Agriculture and Agri-Food Canada, Canada

Growth Parameters Of Forages In A Cool Semi‐Arid Climate, Shabtai Bittman, D. H. Mccartney, F. C. Stevenson

International Grassland Congress Proceedings

No abstract provided.


Large‐Scale Changes In Ratio Of C3 And C4 Plants In Central Asian Grassland During The Last Century As Recovered From Wool Archives, Karl Auerswald, T. Maennel, Y. F. Bai, M. Wittmer, Hans Schnyder 2020 Technische Universität München, Germany

Large‐Scale Changes In Ratio Of C3 And C4 Plants In Central Asian Grassland During The Last Century As Recovered From Wool Archives, Karl Auerswald, T. Maennel, Y. F. Bai, M. Wittmer, Hans Schnyder

International Grassland Congress Proceedings

No abstract provided.


Oat And Wheat Added To Annual Ryegrass Pasture To Improve The Seasonal Forage Offer, M. Arzadun, H. Laborde, D. Morris, L. Fernandez 2020 Universidad Nacional del Centro, Argentina

Oat And Wheat Added To Annual Ryegrass Pasture To Improve The Seasonal Forage Offer, M. Arzadun, H. Laborde, D. Morris, L. Fernandez

International Grassland Congress Proceedings

No abstract provided.


Effects Of Traditional Range Enclosures And Seasonality On Herbaceous Plants Biodiversity In Southern Ethiopia, Ayana Angassa, G. Oba, R. B. Weladji 2020 Hawassa University, Ethiopia

Effects Of Traditional Range Enclosures And Seasonality On Herbaceous Plants Biodiversity In Southern Ethiopia, Ayana Angassa, G. Oba, R. B. Weladji

International Grassland Congress Proceedings

No abstract provided.


Digital Commons powered by bepress