- chernozem (n.)
[chernozem 词源字典]
- 1842, from Russian chernozem, literally "black earth," from chernyi "black," from PIE *kers- "dark, dirty" (see Krishna) + zemlya "earth, soil," from Old Russian zemi "land, earth," from PIE *dhghem- "earth" (see chthonic).[chernozem etymology, chernozem origin, 英语词源]