[elevaet]

This could benefit the soil as less land will be needed to produce the same amount of food. This would allow more land to lie dormant with nitrogen fixing plants, allowing wider periods between crop rotations.

The deeper roots could also benefit the soil. Wild plants tend to have deeper roots, and this brings greater biological activity in the depths of the soil - so more of the soil is 'alive'.

These deep-rooted plants are hardier, so less pesticides will be needed, which also benefits the soil. And on the same note they will need less chemical fertilizer because they can access more nutrients from the depths. Again, good for the soil.

On the other hand, if these crops are farmed overly intensely, they will just end up depleting the soil to a greater physical dept, so we'll be back at the same problem, but deeper. But in the meantime, at least we'll have crops that are accessing more soil volume.