"They just buried them on their farm and kept going.At least his daughter could have reported it since she was in charge of his land after he died."

As I said before, they most likely did not know that they were SUPPOSED to report the death. In the area where I grew up, there were no "family" cemeteries and folks were not "buried on the farm." There are community cemeteries in use back to the late 1800s that are still being used. In many, if not most, instances, the cemeteries were connected to a church. My family is buried in a cemetery for which my great-grandfather donated the land in 1886, deeded to an "AME Church," which was gone long before my time, likely before my father was born.

Most Black families in the community used this cemetery, and the descendants continue to use it today. Those whose families came much later to the community, and had roots and relatives still living in other small rural communities, still bury their dead in those other community cemeteries, wives, of course, being buried in their husband's community cemetery, unless he's an "outsider." [For example, my cousin's husband was from another state and they are both buried in the community cemetery of her father's family's, which is where my aunt is buried, of course.]

None of this says that all these deaths were reported, however. My grandfather for whom I have no death certificate, is buried in "our" cemetery. No headstone either.