Ok I knew i'd get a bunch of smart as remarks posting this, I'll try to explain it to you a little simpler. Get your wife to put on a set of high heals and have her stand on your hand with the heel, hurts like hell doesn't it, now have her step on your hand with the front part, wich one would float better in the field. @ the toe part you may be exerting 100n but at the heel your probably exerting closer to a ton. Here's another, step into your wet field with your boots, now stand on a large beach ball, whats going to leave a bigger markIJ You have to look @ your tires as an air chamber wich in effect the air inside acts like a suspention between whats on top and whats @ the bottom. Trust me I spent a week @ goodyear's prooving grounds in texas arguing with there farm enginers how is that possible. Seen it with my own eyes with pressure bulbs burried in the ground. Minimal air pressure is key to leaving ruts and reducing soil compaction, I've been doing it for over 5 years and its worth every penny especially in wet springs and falkls, Try www.goodyearag.com , firestoneag.com, and michelinag.com They all have there own load inflation tables and they also teach about ground pressure.
