Field comparison of an eddy accumulation and an aerodynamic-gradient system for measuring pesticide volatilization fluxes

The field experiment reported here applied the relaxed eddy accumulation (REA) technique to the measurement of triallate (TA) and trifluralin (TF) volatilization from fallow soil. A critical analysis of the REA system used in this experiment is done, and the fluxes are compared to those obtained by the aerodynamic-gradient (AG) technique. The measured cumulative volatilization losses,corrected for the effective upwind source area (footprint), for the AG system were nigher than with the REA system