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Retention of Three Insecticides on Different Size Soil Particles Suspended in Water
Author(s) -
Richardson E. M.,
Epstein E.
Publication year - 1971
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1971.03615995003500060014x
Subject(s) - loam , soil water , water retention , organic matter , methoxychlor , silt , environmental chemistry , chemistry , pesticide , environmental science , soil science , agronomy , geology , biology , paleontology , organic chemistry
Studies were made to determine the retention of DDT, endosulfan and methoxychlor on different sized soil particles. The two soils used were Marshall silt loam from Iowa and Caribou silt loam from Maine. A portion of each soil was treated with H 2 O 2 to study the effect of organic matter on pesticide retention. Retention of DDT and methoxychlor was highest in the clay fraction of both treated and untreated soils. In the untreated soils the greatest retention of the three insecticides was on the colloidal (<0.08 µ) and 0.08–0.5 µ fraction. Removing the organic matter from both soils reduced the retention on the <0.08 µ and 0.08–0.5 µ clay fractions. The two soils reacted differently to the H 2 O 2 treatment, although the three insecticides followed very similar trends within a soil. It appears that although organic matter contributes to the retention of the insecticides studied, other soil properties also are responsible for adsorption.