Michigan double plow

Michigan double plow

This plow had two bottoms inline, with the one behind arranged to plow in the furrow left by the first bottom. The final furrow was thus much deeper than could be plowed by a single bottom of the same width.
1001 Words and Phrases You Never Knew You Didn’t Know by W.R. Runyan Copyright © 2011 by W.R. Runyan
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