Many measures have been proposed to mitigate gaseous emissions and other nutrient losses from agroecosystems, which can have large detrimental effects for the quality of soils, water and air, and contribute to eutrophication and global warming. Due to complexities in farm management, biological interactions and emission measurements, most experiments focus on analysis of short-term effects of i...

Soil sorption and dissipation of fluometuron (FLM) and three metabolites, desmethyl fluometuron (DMF), trifluoromethyl phenyl urea (TFMPU), and trifluoromethyl aniline (TFMA), were assessed in conservation tillage soils. In study I, surface Dundee silt loam soils from no-tillage (NT) and reduced-tillage (RT) areas were treated with 14C ring-labeled FLM or TFMA or unlabeled DMF, incubated for 34...

Abstract This article describes determining methods of metal emissions in the composition small particles coming by brake mechanisms details and tire wear as a result vehicle movement, dust to be formed comparative analysis on asphalt-concrete roads different compositions. A significant contributor particulate matter cities is traffic-related sources. Traffic-related can divided into exhaust re...

A simple dynamical system that models the competitive thermokinetics and chemistry of cellulose decomposition is examined, with reference to evidence from experimental studies indicating that char formation is a low activation energy exothermal process and volatilization is a high activation energy endothermal process. The thermohydrolysis chemistry at the core of the primary competition is des...

*USDA-Agricultural Research Service, Genetics and Precision Agriculture Research Unit, 810 Hwy 12 East, Mississippi State 39762; †Purdue University, Department of Agronomy, Lilly Hall of Life Sciences, 915 W. State St., West Lafayette, IN 47907-2054; ‡USDA-Agricultural Research Service, Center of Excellence for Poultry Science, Plant Sciences 115, University of Arkansas, Fayetteville 72701; and...

Samples of produce (tomatoes, potatoes, carrots, and lettuce) from the area surrounding the New Bedford Harbor Superfund site were analyzed for the concentration and distribution of 47 polychlorinated biphenyl (PCB) congeners. Samples of produce from out of state also were analyzed for comparison purposes. New Bedford Harbor sediments are highly contaminated with PCBs, which may partition into ...

We describe the theory and current development state of the pesticide process module of the USDA-Agricultural Research Service Root Zone Water Quality Model, or RZWQM. Several processes which are significant in determining the fate of a pesticide application are included together in this module for the first time, including application technique, root uptake, ionic dissociation, soil depth depe...