A procedure for rapidly evaluating the effect of chemicals cm denitrification

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Abstract
A laboratory procedure evaluating chemicals influencing denitrification proved to be simple to perform, reproducible and offers a procedure for the rapid screening of a large number of chemicals. The procedure utilized a nutrient rich medium inoculated with soil and a single dual thermal conductivity detecter which allowed for the determination of O2, N2, CO2 and N2O in the same analytical sequence. The medium chosen allows for rapid rates of denitrification with the chemical's effects clearly delineated in a 5 min analysis with the thermal conductivity detecter after only 24 hr incubation. A high correlation between test chemicals suppressive to denitrification by the laboratory procedure and a long‐term greenhouse study was obtained.

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