I would not use a riding mower on new/young grass or newly altered/loose/wet soil as that seems to cause the tracks in my experience.
The deeper green question - I would guess this is because the wheels are making the grass compress and lay down which make it appear darker or reflect light differently than grass standing up.
This is what causes striping and the weight of the mower/wheels can cause a similar effect.
The deeper green question - I would guess this is because the wheels are making the grass compress and lay down which make it appear darker or reflect light differently than grass standing up.
This is what causes striping and the weight of the mower/wheels can cause a similar effect.
