Download or read book Studies of Atrazine soil Relationships and Methods of Determining Atrazine Residues in Soils written by Marshal Dean McGlamery and published by . This book was released on 1965 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Atrazine soil Organic Matter Relationships and Methodology for Determination of Atrazine Residues written by Edward P. Dunigan and published by . This book was released on 1967 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pesticides Documentation Bulletin written by and published by . This book was released on 1968 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Triazine Herbicides written by Janis Mc Farland Ph.D. and published by Elsevier. This book was released on 2011-08-19 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past 50 years, triazines have made a great impact on agriculture and world hunger by assisting in the development of new farming methods, providing greater farming and land use capabilities, and increasing crop yields. Triazines are registered in over 80 countries and save billions of dollars a year. The Triazine Herbicides is the one book that presents a comprehensive view of the total science and agriculture of these chemicals. With emphasis on how the chemicals are studied and developed, reviewed, and used at the agricultural level this book provides valuable insight into the benefits of triazine herbicides for sustainable agriculture. - Presents previously unpublished information on the discovery, development and marketing of herbicides - Includes a vital section on the origin, use, economics and fate of triazine herbicides - Covers benefits of triazines in corn and sorghum, sugarcane, citrus, fruit and nut crops - Establishes best management practice and environmental benefits of use in conservation tillage

Download or read book Relationships Between Soil Properties and Sorption Behavior of Atrazine on Soils from the Western United States written by Jasmail Singh Brar and published by . This book was released on 1995 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Progress at the Illinois Agricultural Experiment Station written by and published by . This book was released on 1964 with total page 916 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development of Analytical Methods for Determining Bromacil and Atrazine in Soil and Groundwater from Field Use in Waikato written by Trevor Kenneth James and published by . This book was released on 1995 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Microbial Degradation of Atrazine in Soils written by Horace D. Skipper and published by . This book was released on 1966 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atrazine is an asymmetrical s-triazine herbicide used pre- and post-emergence for the control of weeds in many crops. Under conditions considered unfavorable for microbial activity, atrazine may persist in soils for extended periods of time. However, the significance of chemical versus microbial degradation is not known. This study was conducted to determine the significance of microbial degradation of atrazine by pure cultures and the native soil population in non-sterile soils. Isolated bacterial cultures were used to inoculate seeds in an attempt to provide protection against atrazine residues. Atrazine-treated soil was incubated at 30°C for varying periods and the subsequent loss of activity was correlated to evolution of 14CO2 from labeled-atrazine in a radiorespirometric system. Microorganisms, mostly bacteria, were isolated from a soil solution; pour plates of atrazine-treated and non-treated soil; and the rhizosphere of corn, oats, tomatoes, and soybeans. Viable cell counts were used as an index to test for the utilization of atrazine as the sole source of carbon. Eight bacterial isolates did not show an appreciable difference in cell counts with or without atrazine as the sole source of carbon. Seed inoculation with a mixture of three bacterial isolates did not increase the growth of oats grown in atrazine-treated soil as an indication of crop protection. In synthetic media bacterial cultures evolved a small amount of 14CO2 from chain-labeled atrazine during the first 24 hours and none thereafter. In sterile soil the same isolates evolved 0.4-0.7 percent of the input activity in two weeks. A mold respired 4.0 percent. No ring breakage was observed. In non-sterile soils, 1.4-1.6 percent of chain and 0.6-1.0 percent of ring-labeled atrazine was evolved in two weeks and 1.1-1.6 percent of ring-labeled hydroxyatrazine. The latter rate was 2-3 fold greater than from ring -labeled atrazine and indicated the formation of hydroxyatrazine as the rate limiting step in the dissipation of atrazine from soils. Data from the incubation experiment showed a 73 percent loss of the initial atrazine after 3-4 weeks. In a similar time period, only 2.2-2.6 percent of chain and 1.0-1.2 percent of ring-labeled atrazine was respired. Thus, the 14CO2 data did not account for the loss of atrazine and further supports the formation of hydroxyatrazine as the rate limiting step. Extraction of the soils containing labeled-atrazine showed the presence of hydroxyatrazine in non-sterile and sterile soils after two weeks. The radiorespirometric system designed for these studies is proposed as a means to obtain a relative index of the residual life of herbicides or pesticides. The 14CO2 data may be extrapolated to give an index based on microbial participation. Extraction of the soils would provide a test for possible non-toxic metabolites that may be formed via chemical reactions. Such data would be most beneficial in selecting and recommending new herbicides.

Download or read book Fate of Atrazine in Argentinean Soils written by Susana Hang and published by LAP Lambert Academic Publishing. This book was released on 2012 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book are shown the results of the atrazine behavior in Argentinean, conducted between 2001 and 2006. In the first work it was studied the behavior of atrazine in surface soils, and evaluated the effect of land use and how it affects the ability of soil to remove residual atrazine. In the second study it was evaluated two soil profiles characteristic of the province of Cordoba, and in each horizon, the effect of soil properties on the retention and degradation of atrazine mineralization was evaluated. The third study aimed to recognize the distribution along the profile of the soil's ability to mineralize atrazine. The soil sterilization was carried out to quantify chemical and biological degradation of atrazine. In the fourth and fifth paper it was analyzed different strategies of winter weed control and how weed management influenced on the atrazine persistence. In the sixth and final paper it is presented an original proposal to identify soils with rapid mineralization capacity of atrazine, based in corn crop history where atrazine is used. As a tool to reconstruct the history of the lot was used satellite images.

Download or read book Biodegradation of Atrazine in Subsurface Environments written by Jim Sinclair and published by . This book was released on 1992 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Soil Persistence of Atrazine Metolachlor and Metribuzin as Influenced by Temperature Soil Moisture and Soil Characteristics written by and published by . This book was released on 1995 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes a study conducted to: determine the kinetics of dissipation & bound residue formation of widely used pesticides (the herbicides atrazine, metolachlor, & metribuzin) in the Great Lakes area; test laboratory derived dissipation & bound residue formation data; provide decay rates & hydrologic transport parameters for soils in the Great Lakes Basin as input for simulation models; and modify the LEACHP pesticide fate & transport model to provide improved measures of pesticide dissipation kinetics. The study involved a series of experiments and field tests to determine the effect of soil structure on dissipation & bound residue formation, the kinetics of dissipation & bound residue formation in the laboratory & field, the leaching of herbicides, the release of aged residues, and water & transport parameters for use in the model. Results discussed include the variations in herbicide dissipation among different types of soils and tillage practices, the mineralization & volatilization of herbicides in the field, and the performance of the modified LEACHP model.

Download or read book The Extraction and Characterization of Aged Atrazine Residues in Two Wisconsin Soils written by Frederick J. Matt and published by . This book was released on 1997 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Atrazine in North American Surface Waters written by Jeffrey M. Giddings and published by SETAC. This book was released on 2005 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Adsorption of Atrazine by Soils and Soil Colloidal Components written by Rodney Owen Radke and published by . This book was released on 1967 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aging of 14C labeled Atrazine Residues in Soil Location Characterization and Biological Accessibility written by Nicolai David Jablonowski and published by Forschungszentrum Jülich. This book was released on 2009 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Atrazine Degradation in Soil written by David E. Armstrong and published by . This book was released on 1966 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dissertation Abstracts International written by and published by . This book was released on 1970 with total page 1248 pages. Available in PDF, EPUB and Kindle. Book excerpt: