plow sole

plow sole

[′plau̇ ‚sōl]
(geology)
A pressure pan representing a layer of soil compacted by repeated plowing to the same depth.
References in periodicals archive ?
The surface of a paddy field is a plane, however the plow sole on which the transplanter actually drives is bumpy, and the transplanter's front tires are often forced into unwanted directions by hard, muddy soil.