How far is too far? As a grandpa, this is a subject of great concern. The distance an ornery grandson can travel in just a few seconds is amazing. Sometimes this distance really matters and sometimes it doesn’t. In a busy parking lot, yes, it really matters. In an empty field, it probably doesn’t much matter. But as a responsible Grandpa, I better know how far is too far for the different situations or I will have to deal with the consequences.Likewise, how far is too far for soil to move in the erosion process? Well I guess that depends …