"Bob" expounded:

One alternative is to re-till it every few weeks untill seed
sprouting slows.

There will be weed seeds anyways, you'll never get them to all sprout.
As Warren said, aggressive tilling will ruin the soil structure.

It would have been much easier to use a sod cutter and remove the
sod and accompanying seeds before tilling.

By tilling in the sod you gain the benefit of the organic matter. I
think the newspaper idea is the best way to get rid of the rest of the
grass, especially when you have the time.

--
Ann, Gardening in zone 6a
Just south of Boston, MA
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