Why do scholars sometimes refer to african americans in urban areas as hypersegregated?

The scholars uses four fundamental points to outline why an urban center is hyper segregated.
 They argues that blacks are unevenly distributed in a residential area in the town compared to their urban-wide population.
 They also points that blacks tend to reside in blacks neighborhood with minimal contacts with whites.
the scholars also posits that blacks resides at the core of the urban centers.
They also points out that the blacks lives in ghettos and are not scattered in the city.

The answer is crop yield.