Examples from the Web for black earth
In the black-earth belt the farms are usually small, averaging less than 400 acres in extent.
A layer of fertile loess covers the whole surface, and Kursk belongs almost entirely to the black-earth region.
The black-earth region was the first part of North Dakota to be settled.
As every person familiar with Russia knows, the black-earth region is one of the richest and most productive in the world.