Whites have had control over much of that land for more than a hundred years. In that time farming practices have changed, international relationships have changed, technology has changed, etc... Modern farming isn't now, what it used to be, so again, assuming that those people could just pick up these modern farms and run them as was done 150 years ago makes no sense. And that's assuming that the native South Africans are as knowledgeable as you say. 100-150 years ago the average black person in the South in the US probably knew something about farming. Do you think that's still true today? Once again, I'm not arguing that indigenous South Africans don't know how to grow crops. They are likely the ones that taught the white people how to do it. I'm saying that those people aren't necessarily equipped to handle this modern farmland, which is much bigger than they have traditionally dealt with.