Imants rotary spading machines come in many sizes and models. Click HERE For a guide to which machine would work best for you.
Advantages of the spading machine:
Primary and secondary tillage in one-pass, higher yield per hectare, less fuel, better water management, no compaction, better mixing (incorporation), large capacity, Excellent soil structure, Ideal in combination with seeder or ripper, no plow pan, ideally aerates soil & holds moisture, reduces number of passes.
You can find more specific advantages on each of the machine pages.