Rear-tine tillers provide a lot of power. Because the wheels pass over the soil before the tines do, these tillers compact the soil less. They're great for improving the soil in large plots and breaking ground in plots being tilled for the first time.
Will a tiller break up roots?
A garden tiller is a lawn and garden tool that loosens soil and chops up weeds, roots or any plants present on the soil surface. ... For cutting roots, you will need a motorized tiller with a 3 to 8 horsepower motor. The larger the roots you need to cut, the higher the horsepower you will need.