AbstractSimultaneous measurements of the vertical profiles of horizontal wind, temperature, and ozone concentration above a bare, freshly cultivated fine sandy loam were obtained on 12 occasions during a 4‐day period in July when ozone concentrations ranged from 8 to 26 × 1011 molecules (mol) cm−3 (1 × 1011 mol cm−3 = 4 ppb = 8 µg m−3). The decrease in ozone near the soil surface clearly indicated that the soil was removing ozone from the atmosphere. The rate of ozone removal varied from 3 to 12 × 1011 mol cm−2 sec−1. The flux into the soil varied with the concentration of ozone in the air, and indicated a resistance of about 2 sec cm−1 to ozone removal by the soil and the 2.5‐cm air layer immediately above the soil. The rapid removal of ozone by soil in a ventilated chamber suggested a small resistance in the soil alone. A sample of soil containing 14% moisture had a resistance of 0.37 sec cm−1 to ozone removal, which was 0.23 sec cm−1 greater than that of activated charcoal, a strong adsorbing agent. Compaction and additional soil moisture increased the resistance to ozone removal, whereas autoclaving decreased the resistance.