CLOMAZONE DISSIPATION IN 2 TENNESSEE SOILS

Clomazone dissipation in soil was examined in field and laboratory exp eriments, Field studies suggested a potential for injury to rotational crops such as wheat. Field half-lives were 5 to 29 d (average of 9 fi eld studies was 19 d) for the Etowah clay loam (fine-loamy, siliceous, thermic typic Paleudult) and Lily loam (fine-loamy, siliceous, thermi c typic Hapludult) soils, Clomazone had an average half-life of 34 d u nder lab conditions, indicating slower dissipation in the lab than in the field. Clomazone was moderately adsorbed to soil as indicated by a K-d of about 1, and a K-om of 52 in the two soils.