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Physical Sciences and Mathematics Commons

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Full-Text Articles in Physical Sciences and Mathematics

Safety Of Food And Water Supplies In The Landscape Of Changing Climate, Aliyar Cyrus Fouladkhah, Brian Thompson, Janey Smith Camp Oct 2019

Safety Of Food And Water Supplies In The Landscape Of Changing Climate, Aliyar Cyrus Fouladkhah, Brian Thompson, Janey Smith Camp

Agricultural and Environmental Sciences Faculty Research

In response to evolving environmental, production, and processing conditions, microbial communities have tremendous abilities to move toward increased diversity and fitness by various pathways such as vertical and horizontal gene transfer mechanisms, biofilm formation, and quorum sensing


The Cation Exchange Behavior Of Tylosin In Loess-Derived Soil, Jaime J. Call, Michael E. Essington, Sudipta Rakshit Jun 2019

The Cation Exchange Behavior Of Tylosin In Loess-Derived Soil, Jaime J. Call, Michael E. Essington, Sudipta Rakshit

Agricultural and Environmental Sciences Faculty Research

Tylosin (Tyl) is a veterinary antibiotic commonly used in swine and poultry production. Due to metabolic inefficiencies, it enters the environment through manure applications. Ion exchange is an important retention mechanism for Tyl, particularly for smectite clay. The objectives of this study are to characterize the exchange interactions of Tyl with common soil cations in subsoil horizons that contain smectite and to investigate the interactions using in situ Fourier transform infrared (FTIR) spectroscopy. Adsorbed Tyl in pH neutral, smectitic subsoil horizons is divided into exchangeable and nonexchangeable forms. The percentage of adsorbed Tyl that is exchangeable varies from 36% to …


Arbuscular Mycorrhizal Fungi And Exogenous Glutathione Mitigate Coal Fly Ash (Cfa)-Induced Phytotoxicity In Cfa-Contaminated Soil, Olushola M. Awoyemi, Ekundayo O. Adeleke, Kudjo E. Dzantor May 2019

Arbuscular Mycorrhizal Fungi And Exogenous Glutathione Mitigate Coal Fly Ash (Cfa)-Induced Phytotoxicity In Cfa-Contaminated Soil, Olushola M. Awoyemi, Ekundayo O. Adeleke, Kudjo E. Dzantor

Agricultural and Environmental Sciences Faculty Research

Coal fly ash (CFA) makes a bulk of the coal combustion wastes generated from coal-fired power plants. There are several environmental mishaps due to coal ash spills around the world and in the United States. Management of CFA-polluted sites has proven inefficient resulting in soil infiltration, leaching, and phytotoxicity. This study assessed the mitigation strategies for CFA-induced phytotoxicity using biological [arbuscular mycorrhizal fungi (AMF)] and chemical [exogenous glutathione (GSH)] agents. Indices of phytotoxicity include seed germination, plant morphometrics, lipid peroxidation and genomic double-stranded DNA (dsDNA) in switchgrass plant (Panicum virgatum). Experiments include laboratory screening (0, 5, 10, 15 and 20% …


Sampling Soils In A Heterogeneous Research Plot, Jianwei Li Jan 2019

Sampling Soils In A Heterogeneous Research Plot, Jianwei Li

Agricultural and Environmental Sciences Faculty Research

Soils are highly heterogeneous. In general, the number of soil samples required for soil research has always been determined arbitrarily and the associated accuracy is unknown. Here, we present a detailed protocol for efficient and clustered soil sampling in a research plot and, relying on a pilot sampling using this design, for demonstrating soil spatial heterogeneity and informing reasonable sample sizes and associated accuracy for future study. The protocol mainly comprises four steps: sampling design, field collection, soil analysis, and geostatistical analysis. The step-by-step procedure is modified according to former publications. Two examples will be presented to demonstrate contrasting spatial …