I have the best land clearing equipment for clearing stumps trees brush or raking and piling anything rock ect.
they get more work done quicker than anything else you will find
Cutting stumps and trees off at ground surface or below surface called shearing.
These are special built cutter blades on D8 and D9 size crawler tractors and have the root rakes to go with them.
And when I am done you will be ready for seeding. You wont have any of that mulch to wait on for decaying.
This is the fastest most practical economical and cheapest way to clear land no comparison.
a GRINDER would still be on the 1st acre after I have been thru 10 yes its that fast the more acres the cheaper the price.