BILL J. - re plowing with Cub Cadets... The narrow width of CC's transfers more weight off the left rear wheel, also called the "Land Wheel" onto the right rear wheel, also called the "Furrow wheel", because of running the right wheel in the furrow, which tips the tractor to the right. And also because the furrow wheel is running on nice freshly uncovered and most times damp dirt it gets better traction. The land wheel is running on dry, often trashy dirt that traction varies on.
This even effects full size tractors when plowing. Years ago when farmers always plowed most ran a dual wheel on the land wheel while getting two tires into the furrow wasn't possible. I've put an extra wheel weight on the land wheel when plowing before which helped balance the traction from side-to-side but still didn't end the slippage of the land wheel.
As Kraig's picture shows, most people just sit over the edge of the seat towards the land wheel when plowing.
The amount of extra weight needed to plow varies with conditions, but when plowing in "Normal" conditions, meaning not wet enough to be slick & muddy, or dry enough for the ground to be rock hard, only lugged tires or turf tires with chains, and one, maybe two sets of 26# IH weights are enough. More is sometimes better in difficult conditions. Normally added frt weight isn't needed. I ran about 75# of frt weight @ PD#1 with my #72 and really didn't need it, in fact I think it reduced weight transfer to the rear wheels. I have about 130# of suitcase weights I can put on the frt of my 982, and sometimes I really need them, like when plowing and raising the plow out of the ground... I've had both frt tires a foot or two off the ground. But for just plowing the extra frt weight isn't really needed IMO.