Results 191 to 200 of about 1,927,762 (224)
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Soil Persistence of Dinitramine
Weed Science, 1980The effects of soil temperature, moisture, and herbicide concentration on the rate of degradation of dinitramine (N4,N4-diethyl-α,α,α-trifluoro-3,5-dinitrotoluene-2,4-diamine) were measured in clay loam and sandy loam in the laboratory. In sandy loam, the rate of degradation increased with increasing temperature.
J. A. Poku, R. L. Zimdahl
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Persistence of D.D.T. and Benzene Hexachloride in Soils
Annals of Applied Biology, 1948Acid and alkaline soils, both alone and mixed with 2 % of D.D.T. or 2 % of benzene hexa‐chloride (mixed isomers, containing 10% of the γ‐isomer) have been exposed outdoors or subjected to controlled leaching in the laboratory. Residual insecticide has been estimated at intervals by a method involving dehydrohalogenation, and determinations have also ...
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Persistence of triazine herbicides in soils
1970Although phytotoxic residues of the triazine herbicides are objectionable when, in some soils and under some environmental conditions, sensitive plants are injured the season after application, residual activity is essential for weed control and soil sterilization.
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Metribuzin Persistence in Soil
Weed Science, 1977The persistence of metribuzin [4-amino-6-tert-butyl-3-(methylthio)-as-triazine-5(4H)-one] in several soils from the lower alluvial floodplain of the Mississippi River was studied in the greenhouse and laboratory using bioassay and gas chromatographic methods of residue detection.
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Adsorption, desorption and persistence of fomesafen in soil
Pest Management Science, 2018AbstractBACKGROUNDFomesafen provides control of glyphosate‐resistant Palmer amaranth in cotton but frequent seedling injury has been reported. This study evaluated soil adsorption, desorption, and field persistence of fomesafen.RESULTSThe Freundlich distribution coefficient (Kf) for fomesafen on seven US soils varied from 1.30 to 9.28 µg1–1/n g−1 mL1/n.
Xiao Li +4 more
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Persistence of herbicides in soil
Crops & Soils, 2016While it is desirable for the chemicals to control weeds during the season of application, it is not desirable for them to persist and affect subsequent crop growth. Factors that determine the length of time herbicides persist fall into three categories: soil factors, climatic conditions, and herbicidal properties.
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Mineralogical Magazine, 1998
There is general agreement that in many soils some C compounds persist for centuries and perhaps millenia, particularly deep in the soil profile. Various chemistries and mechanisms of stabilization of C compounds have been proposed to explain their longevity in soils.
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There is general agreement that in many soils some C compounds persist for centuries and perhaps millenia, particularly deep in the soil profile. Various chemistries and mechanisms of stabilization of C compounds have been proposed to explain their longevity in soils.
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TBT and TPhT persistence in a sludged soil
Chemosphere, 2006The persistence of tributyltin (TBT) and triphenyltin (TPhT) in soils was studied, taking into consideration the quantity of sewage sludge, TBT and TPhT concentrations in soil as well as the soil pH. The organotin compounds (OTC) were introduced into the soil via a spiked urban sludge, simulating agricultural practise. OTC speciation was achieved after
Christophe, Marcic +3 more
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The fate and persistence of polychlorinated biphenyls in soil
Journal of Environmental Monitoring, 1999The fate and persistence of PCBs 28, 52, 101, 138, and 180 artificially introduced into three soils was studied under a variety of field conditions for up to 415 d following initial contamination. A relationship was detected between ln Koa (octanol/air partition coefficient) and the experimentally observed first-order loss rate constant that was ...
S, Ayris, S, Harrad
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Persistence of chlorpyrifos in a mineral and an organic soil
Journal of Environmental Science and Health, Part B, 1980Chlorpyrifos (Lorsban emulsifiable concentrate) was applied at 3.4 kg AI/ha and incorporated into sand and muck soil contained in small field plots. Soil samples were taken at intervals over 2 yr. Radishes and carrots, seeded yearly, served as indicator crops for absorption of insecticide residues.
R A, Chapman, C R, Harris
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