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Full-Text Articles in Organisms
Response Of Soil Nitrification To The Veterinary Pharmaceuticals Monensin, Ivermectin And Zinc Bacitracin, Magda A. Konopka
Response Of Soil Nitrification To The Veterinary Pharmaceuticals Monensin, Ivermectin And Zinc Bacitracin, Magda A. Konopka
Electronic Thesis and Dissertation Repository
Pharmaceutical residues can reach agricultural land through amendment with animal or human waste. Since 2010, a series of replicated plots received annual applications of ivermectin, monensin and zinc bacitracin, either singly or in a mixture, at 0.1 mg/kg and 10 mg/kg concentrations. I collected soil samples before and after the fourth annual application of pharmaceuticals and assayed them for functional changes and amoA gene abundance, a gene needed for ammonia oxidation. In 2013, I exposed the soils to 100 mg/kg in a laboratory experiment which resulted in acceleration of nitrification. Under 10 mg/kg treatments in the field the abundance of …
Dissolution And Precipitation Of Gypsum In The Soil Under Irrigation, Badier J. Alawi
Dissolution And Precipitation Of Gypsum In The Soil Under Irrigation, Badier J. Alawi
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Two soils were used in this soil column study. Yolo loam soil a non-calcareous, non-gypsiferous soil from central California and Vernal soil a calcareous soil from eastern Utah.
Initial studies were conducted where the solubilities of pure CaC03 and CaS04 ' 2H20 were determined in the presence of Logan river water, a KCl solution (2.8 mmhos/cm) and a K2S04 solution (2. 7 mmhos/cm). Gypsum was more soluble in the KCl solution than in the K2S04 solution. The solubility product of both gypsum and lime were determined from the analytical …
Boron Movement In Soil Columns, Joseph William Stucki
Boron Movement In Soil Columns, Joseph William Stucki
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Three adsorption theories--Langmuir, B.E.T., and Freundlich--were applied to boron interaction with Aiken clay loam and Vernal sandy loam soils to determine which bests describes the system.
Column studies were conducted to obtain constants related to mass fluid flow and fluid dispersion within the column. An inert ion was used to obtain the pore volume and to calculate the fluid dispersion coefficient. These data were used to solve the material balance equation by the explicit numerical method developed by Lai for a digital computer. The output from the computer was a predicted profile boron distribution within the soil column.
The soil …