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Effect of Soil Moisture and Irrigation on Propargyl Bromide Volatilization and Movement in Soil

^a Département des sols et de génie agroalimentaire, Pavillon de l'Envirotron, FSAA, Université Laval, QC, Canada G1K 7P4
^b George E. Brown Jr. Salinity Laboratory, USDA-ARS, 450 W. Big Springs Rd, Riverside, CA 92507

View larger version (79K): [in a new window]   Fig. 1. Soil column and sampling system.

View larger version (25K): [in a new window]   Fig. 2. Volatilization rate and cumulative volatilization rate through time in Treatments M-5 and M-M.

View larger version (68K): [in a new window]   Fig. 3. Bromide distribution 216 h after fumigation for different treatments.

View larger version (70K): [in a new window]   Fig. 4. 3-Bromo-propyne concentration (µg cm–3) distribution in the soil gas phase at different times after its injection in Treatment M-5.

View larger version (48K): [in a new window]   Fig. 5. Pressure distribution in the gas phase and gas phase concentration associated with the direction of their flux in Treatment M-5 at the beginning of the irrigation.

View larger version (74K): [in a new window]   Fig. 6. 3-Bromo-propyne distribution in the gas phase 216 h after fumigation for different treatments.

View larger version (67K): [in a new window]   Fig. 7. Water content distribution in the profile 216 h after fumigation for different treatments.

View larger version (63K): [in a new window]   Fig. 8. 3-Bromo-propyne distribution in the liquid phase 216 h after fumigation for different treatments.