soil depth
soil depth, a loose term for the depth to the boundary between the soil and its parent material; or, alternatively…
Start your membership this Father’s Day with 20% off a full year. Expert reviews, honest writing, no guesswork. Or, gift a membership and save 20%.
Enter code DAD20 at checkout. Offer ends 22 June.
Everything in “Member”, plus:
Everything in “Professional”, plus: