chernozem
Concise Oxford English Dictionary © 2008 Oxford University Press:
chernozem /ˈtʃəːnəzɛm/
▶noun a fertile black soil rich in humus, typical of temperate grassland.
– origin C19: from Russ., from chërnyĭ ‘black’ + zemlya ‘earth’.
'chernozem' also found in these Oxford entries:

