Evolutionary trends in gas diffusivity
Compaction effects can also be seen on the scale of gas diffusivity. This is reduced due to compaction effects. This would hinder aerobic biotic activity on multiple scales.
The following plots in figure 1 show the influence of compaction as well as the influence of plowing.
Evolution of relative gas diffusivity over time. a) and b) represent measurements taken at 10 and 30 cm depth respectively
Overall trends appear to still be regenerating back to the initial conditions after over two years.