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Showing 1 to 20 of 31 for “"Agricultural Chemicals"”.
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Compost Bioreactors for Removing Agricultural Chemicals From Tile Drainage Water
… the mature compost commonly used in traditional agricultural applications.
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Modeling transport of agricultural chemicals in a dual porosity system resulting from macropores
A conceptual model, based upon the bicontinuum double porosity approach, has been developed to simulate water flow and reactive chemical transport in both the soil matrix and the macropore region. Flow of water in both regions is governed by Richards' equation and chemical transport is based upon …
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The Influence of Agricultural Chemicals on Aquatic Invertebrate Biodiversity and Genetic Diversity in Northern Prairie Wetlands
<p>In the summer of 1990, four sampling gear and four sorting techniques commonl y used in wetland invertebrate investigations were evaluated. In the summer of 1991, the impact of the insecticide phorate on wetland invertebrates, and the use of a community diversity index and electrophoresis as …
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Long-Term Effects of Agricultural Chemicals and Management Practices on Water Quality in a Subsurface Drained Watershed
Double mass curve analysis indicated that the increase of nutrient and herbicide loading began when high amounts of rainfall occurred following chemical application. The primary factor that was found to affect nutrient and herbicide loading was subsurface flow, especially during the growing seasons.
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The detection and quantitation of agricultural chemicals in some freshwaters used for potable water supplies in Grampian Region.
… organic pollutants which have been used during agricultural practices. A specific aim was to analyse water sources for herbicides (weedkillers) regularly used within the area of Scotland known as Grampian Region. Of particular interest was the analysis of groundwater at a site in the River Spey …
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Design and implementation of an automated reconfigurable modular flow chemistry synthesis platform
… force behind advances in pharmaceuticals, agricultural chemicals to advanced materials; however, these fields have struggled with a slow pace of discovery, limited reproducibility, and difficulty scaling promising new molecules. Current organic chemistry labs rely on batch methodologies …
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Correlation of Electron Donor Concentrations in Sediments with Sediment Properties: New Providence, Iowa
… from 11 boreholes at the US Geological Survey Agricultural Chemicals Transport site near New Providence, Iowa. All samples were analyzed for gravel, sand (coarse, medium, and fine), silt, clay, inorganic carbon contents and for the following electron donors: organic carbon, ferrous iron, and …
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Managing agricultural contamination of ground water: the institutional framework
Contamination from agricultural fertilizers and pesticides has been recognized as a serious threat to underground drinking water sources. Through separate federal acts and amendments, the states have been given various levels of support with which to attack this contamination problem. However, …
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Characteristics of Patients Who Visit the Emergency Department with Self-inflicted Injury
… of injury in the < 50 age group, and the use of agricultural chemicals was the primary means in the ≥ 50 age group. The reasons for attempting suicide varied among the age groups. The predictors of severe outcome were male gender, older age, and not having consumed alcohol.
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Fully-coupled physically-based approach for modeling conventional and managed subsurface drainage
… that is partly responsible for the legendary agricultural productivity of the ""corn-belt"" region in the United States. Recent researches indicate that the conventional drainage practice has contributed a large percentage of the surface water pollution by agricultural chemicals while the …
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Computer solution of equations for three centrifugal distributor configurations
… materials such as seed, granular fertilizer, and agricultural chemicals. A major problem with this equipment is nonuniform spreading which frequently results in reduced crop yield. The object of this study is to provide information required for more satisfactory design of spreading equipment. The …
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Community Perception on Climate change and its adaptation Strategies at Nachingwea District – Lindi Region
… attack on crops and 15.2% ineffectiveness of agricultural chemicals used due to delay in rainfall. Extension services were reported as inadequate and under capacitated to provide education on better agricultural practices, climate change, and environmental conservation. Educational programme …
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Preferential flow mechanisms : their interaction and effect on dye movement in till and glaciolacustrine sediment
<p>Contamination of groundwater by agricultural chemicals is of concern to the population of the Northern Great Plains. Preferential flow (macropore, finger, and funnel) allows such chemicals to move relatively rapidly through materials considered to be aquitards. Preferential flow mechanisms at …
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The Toxicity of Pesticides to Mammalian Cells as Altered by Redox-Modified Smectites
The fundamental concern about agricultural chemicals is their environmental fate and toxicologic risk to humans and other non-targeted animals. The application of pesticides to soil is typically direct or through post-emergence methods. Degradation of pesticides is typically considered to be a …
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Using big data for decisions in agricultural supply chain
… the numerous data sources available in the agricultural field and analyzes them for usage in supply chain improvement. We identified certain applicable data and investigated methods of using this data to make better supply chain decisions within the agricultural chemical distribution chain. …
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Evaluation of a nontidal riparian wetland as a naturally occurring decontamination zone
The potential harmful effects of agricultural chemicals on human health and the Chesapeake Bay have led to the need to identify economical practices that limit the chemicals impact on surface and ground water contamination. The agricultural practices of the Atlantic Coastal Plain in Virginia have …
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Organic farming in Thailand: case studies on chemical-free vegetable production in Chiangmai, Thailand : a dissertation submitted in partial fulfilment of the requirements for the degree of Master of Applied Science (International Rural Development) at Lincoln University
… Forty-five farmers from three categories of agricultural methods: chemical-free vegetable farming (CFA), mixed agriculture (MA) and conventional agriculture (CA), were interviewed. The study found that profit maximisation was the first priority in the farmers' goals in all production …
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Active Learning-Closed-Loop Optimisation for Organic Chemistry and Formulations Research
… purposes such as medication to treat diseases, agricultural chemicals to ensure sufficient nutrition or monomers to manufacture materials. Finding optimal methods and pathways toward target molecules is a task that has been intuition-guided for years, requiring expert chemists to select chemical …
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Analysis of the impact on the stock market of chemical disasters: petrochemical companies in industrial complex in Korea
… 30% specialty (consumer products, agricultural chemicals, coatings, and fine chemicals), and 60% basic (polymers, synthetic rubber and fibers, basic inorganic chemicals, and basic organic chemicals). This study examined 18 different petrochemical, food chemical and steel companies …
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