They were systematically discriminated against by Department of Agriculture workers involved in federal farm programs. They won a quite large court case several years ago:
Pigford v. Glickman (1999) was a
class action lawsuit against the
United States Department of Agriculture (USDA), alleging
racial discrimination against African-American farmers in its allocation of farm loans and assistance between 1981 and 1996. The lawsuit was settled on April 14, 1999, by Judge
Paul L. Friedman of the
U.S. District Court for the District of Columbia.
[1][2] To date, almost US$1 billion has been paid or credited to more than 13,300 farmers under the settlement's
consent decree, under what is reportedly the largest civil rights settlement to date. As another 70,000 farmers had filed late and not had their claims heard, the 2008
Farm Bill provided for additional claims to be heard. In December 2010, Congress appropriated $1.2 billion for what is called
Pigford II, settlement for the second part of the case.
[2]
https://en.wikipedia.org/wiki/Pigford_v._Glickman