Since I own a tracked tractor I guess I can answer.....

Tracks do not like any situation where you have to run over any thing the raise above the surface.   Tracks are like a bull dozer in that they have the teeter totter effect.  The under carriage is ridged (straight).  If you go up a rise then it starts to fall off on the other side, the tracks do not start down until 50% of the vehicle weight crosses the peak of the rise.  Then the teeter totter flips and the tracks slam down on the other side.  Terraces are terrible on tracks.  Now  a depression is just the opposite.  Tracks never fall in the low place.  They just go right over it.  If the ground is moist and has some "give" to it track ride very well.  But in drought when the ground is very hard, tracks can have a lot of "vibration".

You can turn and run perpendicular to the rows with a track tractor and it can be as smooth as glass and the wheeled implement behind you will be being beat to death.  But lay a 4 x 4 down and run over it and tracks will throw you thru the glass.