Roots? I hope your asking about grass and weed roots.
Prep for grass seeding.
Spray generous amounts of Weed Killer, wait for it to work and wait for at least One heavy rain.
Then lightly disk or rototill about an inch or two deep a couple of times to help keep weeds out and mix things up.
After about a month or two or at least 3 heavy rains the weed killer should have stabilized and you are ready to spread seed.
After seeding, spreading a light layer of pine needles or clean weed free grass clippings as a cover, helps allot to retain moisture and keep seeds from washing or being blown away.
Hope that helps, might I suggest you cobble together your plan from previous and future responses. Many ideas are better than one.