FIG. 1.

Time course of ¹⁴CO₂ production from ¹⁴CO in sealed jars containing 10 g (fresh weight) of soil from depths of 0 to 2 cm (○), 2 to 4 cm (□), 4 to 6 cm (●), and 6 to 8 cm (■). The soil core used was obtained from the DMC forest. See Fig. 7 through 9 for untransformed time courses.