| 释义 |
d-horizon
\ˈdē ̷ ̷| ̷ ̷ ̷ ̷\ noun
Usage: usually capitalized D
: a soil layer that sometimes occurs beneath the B-horizon or the C-horizon if present, that has not been subjected to weathering, and that may consist of the unmodified mineral matter from which the more superficial layers developed or of a different complex of mineral matter |