Sorry that isn't correct, the ground has nothing to do with it. It's the relation of the ball to the line. The rule book says fair territory is from the baselines perpendicular upwards. Any part of the ball that breaks that plane it is fair.
The rule book says fair territory is from the baselines perpendicular upwards. If the ball is rolling and just nicks the base is it fair even if the ball was in contact with the ground foul?
I have always figured that over the course of a season the number of calls against would be about the same number as those for. After reading Twins Daily the last few years it seems that the missed calls always go against the Twins. The math makes that seem unlikely but maybe that's why math isn't allowed on here.