Premium
Effect of Several Insecticides on Ammonification and Nitrification in Two Neutral Alluvial Soils
Author(s) -
Brown A. L.
Publication year - 1954
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/sssaj1954.03615995001800040016x
Subject(s) - dieldrin , aldrin , heptachlor , loam , environmental chemistry , nitrification , chemistry , lindane , chlordane , toxicology , soil water , pesticide , agronomy , environmental science , nitrogen , biology , organic chemistry , soil science
Columbia fine sandy loam and Yolo loam were incubated in the laboratory at 15% moisture and five rates (0, 0.0005%, 0.005%, 0.05%, and 0.5% active ingredient) of insecticide. The insecticides used were, DDT, aldrin, dieldrin, lindane, heptachlor, and chlordane. All insecticides were applied as wettable powder formulations. Ammonia and nitrate were determined after 15, 30, and 60 days of incubation. In general, the results seem to indicate that rates of insecticide of 0.05% or greater will inhibit nitrification in some soils. DDT is the least toxic to the nitrifiers of the insecticides studied, while aldrin, dieldrin, and chlordane are the most toxic. Lindane and heptachlor occupy an intermediate toxicity. The significance of the results is discussed. The rates of insecticide required to produce an effect on nitrification and ammonification are greatly in excess of common rates of application for the materials studied.