Organic Matter Reactions Involving Pesticides in Soil

Stevenson, F. J.

doi:10.1021/bk-1976-0029.ch015

Cited by 62 publications

(72 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Em solos com baixo teor de C org , a fração mineral não se apresenta recoberta pelo húmus do solo, mas sim por minerais acessórios, que podem contribuir com a sorção de moléculas ionogênicas orgânicas (Stevenson, 1976;Khan et al, 1979;Hasset et al, 1981;Baskaran et al, 1996;Regitano et al, 1997).…”

Section: Resultsunclassified

Atributos de solos tropicais e a sorção de imazaquin

Regitano

Alleoni

Tornisielo

2001

Sci. agric. (Piracicaba, Braz.)

View full text Add to dashboard Cite

O imazaquin é um herbicida com caráter ácido, de uso intensivo no Brasil para controlar plantas daninhas associadas à cultura da soja. Estudou-se a sorção do imazaquin e a sua relação com a CTC, o pH e os teores de carbono orgânico (Corg) e argila de onze amostras de solos tropicais. Para a obtenção das isotermas de sorção, soluções de imazaquin nas concentrações de 0,53; 0,88; 1,45; 2,71 e 5,20 mg mL-1 foram preparadas em CaCl2 0,005 mol L-1 com a adição de um traçador radioativo (14C-imazaquin). O coeficiente de sorção (Kf) foi calculado a partir da equação linearizada de Freundlich. A sorção do imazaquin variou de baixa a moderada (Kf <3,0), exceto no Gleissolo. O teor de Corg e o pH da solução foram os principais atributos do solo correlacionados com a sorção do imazaquin. A inclusão do teor de argila na análise de regressão aumentou em 20% a precisão do modelo. O imazaquin apresenta maior disponibilidade e, portanto, maior potencial de lixiviação em solos com valores de pH acima de 6 e com baixos teores de Corg e argila.

show abstract

Section: Resultsunclassified

Atributos de solos tropicais e a sorção de imazaquin

Regitano

Alleoni

Tornisielo

2001

Sci. agric. (Piracicaba, Braz.)

View full text Add to dashboard Cite

show abstract

“…In addition, the manure treatment applied a greater amount of C than the MAP and compost treatments, which would produce greater amounts of both humic and fulvic acids during decomposition. Stevenson and Ardkani (1972) reported that these acids act as chelating agents and are capable of complexing Zn, thereby rendering it more available to plants. García-Mina et al (2004) also reported that Zn-humic complexes significantly increased plant uptake.…”

Section: Leytem Et Almentioning

confidence: 99%

Nutrient Availability to Corn From Dairy Manures and Fertilizer in a Calcareous Soil

Leytem¹,

Dungan²,

Moore

2011

Soil Science

View full text Add to dashboard Cite

The expansion of the dairy industry in southern Idaho has led to increased application of manures to meet crop nutrient demands that can alter the uptake pattern of both macronutrients and micronutrients. A greenhouse study was conducted to determine the effects of dairy manure, composted dairy manure, and fertilizer (monoammonium phosphate) application on soil test phosphorus (P), microbial activity, and nutrient uptake by silage corn (Zea mays). Two Portneuf soils, having either a low or high soil test P concentration, were amended with the three treatments at four application rates (25, 50, 100, and 200 mg P kg j1 ) with four replications of each treatment in a randomized complete design. Treatments were incubated for 2 weeks, then planted with corn grown for approximately 3 weeks. Soil samples were analyzed before planting, whereas plant samples were analyzed at the end of the growing period. Increases in Olsen P from P additions were greatest in the monoammonium phosphate and least in the manure-treated soils. Plant dry matter production and tissue P concentration did not differ with treatment. Tissue K increased with manure and compost addition, whereas tissue Ca decreased; there was also a decrease in tissue Mg with compost application. Tissue Zn increased with manure applications, whereas tissue Mn decreased with manure and compost application on the low-P soil. It is important to consider plant nutrient interactions when applying manure and compost to forage crops as imbalances in K, Ca, and Mg can have a negative impact on animal health.

show abstract

“…Only the concentrations of chromium and nickel were not significantly different between the two sediment fractions. The results of the analyses were unexpected because other investigators have found that the concentrations of trace metals and organic compounds in soils and sediments were associated very closely with the percentage of clay (Forstner and Wittmann, 1979, p. 121-126;Stevenson, 1976;McDuffie and others, 1976).…”

Section: Relation Between Constituent Concentration and Particle Sizementioning

confidence: 79%

“…Suspended organic carbon is part of the suspended sediment, and organic carbon has more bonding surface for sorption than other components of suspended sediment, such as sand-sized quartz. At least one investigator (Stevenson, 1976) reported that the relative ability of inorganic particles to provide bonding surfaces for sorption depends on the presence of organic coatings on the particle. Troup and Bricker (1975) report that concentrations of metals are related directly to the concentration of decaying organic matter in transport in the Susquehanna River.…”

Section: Transport Of Trace Metals and Organic Substancesmentioning

confidence: 99%

Effects of low-level dams on the distribution of sediment, trace metals, and organic substances in the lower Schuylkill River basin, Pennsylvania

Yorke¹,

Stamer²,

Pederson³

1985

View full text Add to dashboard Cite

PREFACEIn 1973, the U.S. Geological Survey began a series of intensive river-quality assessments designed to demonstrate the use of river-quality studies in basin planning and water-resources management. The first of these assessments was conducted in the Willamette River basin, Oregon. Others have been completed in the Yampa River basin, Colorado and Wyoming; the Chattahoochee River basin, Georgia; the Apalachicola River basin, Florida; the Truckee and Carson River basins, California and Nevada; and the Potomac River basin, Maryland and Virginia. Objectives of the assessments were to define the types and amounts of data required to assess various river-quality problems and to develop and document methods for assessing planning alternatives in terms of potential impacts on river quality.The assessments were a result of recommendations from the Advisory Committee on Water Data for Public Use. This committee was established to help implement Office of Management and Budget Circular A-67, which designated the U.S. Department of the Interior responsible for coordinating Federal water-data acquisition and the U.S. Geological Survey responsible for acquiring the data. In 1971, the Advisory Committee was concerned because suitable information on river-basin planning and on water-quality management of major rivers was not available. The concern resulted from the inadequacy of water data to address problems that demanded legislative action. Major problems included (1) definition of water quality of the Nation's rivers, (2) analysis of water-quality trends, especially the effectiveness of pollution-control programs in improving water quality, (3) determination of whether advanced wastewater treatment was desirable or necessary on a national, State, or river-basin basis, and (4) definition of the interrelation of land use and water quality. The committee recommended that the Geological Survey assess these problems, using the Willamette River basin for the pilot study.This water-supply series, Water-Supply Paper 2256 consists of the two primary reports that present the results of the Schuylkill River Quality Assessment, which is the first to address river-quality problems associated with trace metals and trace organic substances. The Schuylkill River was chosen for study because of heavy use of the river for municipal water supplies and a history of accidental spills and discharges of trace substances in the heavily industrialized reach of the river between Reading and Philadelphia, Pa.The Schuylkill River Quality Assessment was divided into three components on the basis of results of review of water-quality conditions in the basin by the project staff and officials from local, State, and Federal agencies. The first component was a review of the methods of conducting trace substance studies and a determination of the most appropriate methods of sampling and analyzing water, sediment, and biota to define ambient conditions in the aquatic environment. The second component was a determination of the distribution and transport ...

show abstract

Organic Matter Reactions Involving Pesticides in Soil

Cited by 62 publications

References 0 publications

Atributos de solos tropicais e a sorção de imazaquin

Atributos de solos tropicais e a sorção de imazaquin

Nutrient Availability to Corn From Dairy Manures and Fertilizer in a Calcareous Soil

Effects of low-level dams on the distribution of sediment, trace metals, and organic substances in the lower Schuylkill River basin, Pennsylvania

Contact Info

Product

Resources

About