Results 221 to 230 of about 45,409 (266)

The fate and persistence of polychlorinated biphenyls in soil

Journal of Environmental Monitoring, 1999
The 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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Movement and persistence of aldicarb in certain soils

Archives of Environmental Contamination and Toxicology, 1977
When the rate of movement and the persistence of aldicarb in 4 types of soils were investigated in laboratory and field studies some leaching was detected in coarse sand; however, leaching was quite limited in clay loam and muck soils. These data indicated that aldicarb degraded quite rapidly in the selected soils and most of the applied radioactivity ...
J R, Coppedge, D L, Bull, R L, Ridgway
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Persistent C in Soils

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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Persistence, degradation and leaching of coumaphos in soil

Journal of Environmental Science and Health, Part B, 2000
Dissipation, degradation and leaching of fresh 14C coumaphos, alkylated 14C coumaphos and aged residues of 14C coumaphos from vats were studied in alkaline sandy loam soil in soil columns in the field under subtropical conditions in Delhi for a year. Dissipation, degradation and bound residue formation was more in case of alkali treated coumaphos than ...
T, Jindal, D K, Singh, H C, Agarwal
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Persistence of Chlorinated Hydrocarbon Insecticides in Soils

Science, 1967
The percentages of technical aldrin, chlordane, endrin, heptachlor, Dilan, isodrin, BHC, and toxaphene remaining in Congaree sandy loam soil after 14, years were 40, 40, 41, 16, 23, 15, 10, and 45, respectively; those of purified aldrin and technical dieldrin after 15 years were 28 and 31, respectively; and the percentage of technical DDT in three ...
R G, Nash, E A, Woolson
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Persistence of chlorfenvinphos in soils

Pesticide Science, 1975
AbstractThe persistence and behaviour of chlorfenvinphos, an organophosphorus insecticide, was studied on different soils. On a peaty soil the insecticide was only very slowly degraded, there being 70% of the applied dose remaining after 21 weeks and 30% after nearly 12 months. On the sandy soils, however, persistence was much shorter; between 3 and 15%
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Persistence of hexaconazole, a triazole fungicide in soils

Journal of Environmental Science and Health, Part B, 2000
Persistence of hexaconazole (2-(2,4-dichlorophenyl)- 1-(1H-1,2,5-triazol-1-yl) hexan-2-ol) was studied in alluvial, red and black soils under flooded and nonflooded conditions. This fungicide was more persistent in all soils under flooded conditions than under nonflooded conditions and at 27 degrees C than at 35 degrees C.
N, Singh, P, Dureja
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Terbuthylazine persistence in an organic amended soil

Journal of Environmental Science and Health, Part B, 2008
The aim of this work was to study the effect of the application of a solid waste from olive oil production (alperujo) on the movement and persistence of the herbicide terbuthylazine (N2-tert-butyl-6-chloro-N4-ethyl-1,3,5-triazine-2,4-diamine). An experimental olive grove was divided in two plots: (i) Plot without organic amendment (blank) and (ii) Plot
Cabrera Mesa, Alegría, Cox, Lucía, Velarde Muñoz, Pilar, Cornejo, J.   +3 more
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Persistence of pronamide in soil

Pesticide Science, 1970
AbstractUnder field conditions, there was little loss of herbicidal activity following spring application of pronamide when the soil temperature remained below about 13°c, but under normal summer conditions loss was rapid (half‐life 2–4 weeks). The rate of loss was retarded when the surface soil became very dry.
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Persistence of chlorpyrifos in a mineral and an organic soil

Journal of Environmental Science and Health, Part B, 1980
Chlorpyrifos (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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