brunizem

(bro̵̅o̅nə zem′)

noun

any of several dark-brown prairie soils

Origin: coined (1938) by F. F. Riecken and G. Smith, U.S. agronomists < bruni-, brown (suggested by Fr brun: see brunet) + Russ (cherno)zem, (black) earth (see chernozem) < IE base *ĝhthem-, earth > L humus

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