Originally Posted by Exact Rototilling
I totally agree. With that said a single pass with ANY of the rolling time aerators on the market both WB and the stand on simply do not open up the soil enough IMO to be a good value as far as broadcast over seeding. 2 passes with a Plugr® 800 or a Ryan 28 reciprocating will do far more in accomplishing than a lesser machines could.
Now IF a manufacturer was to make a reciprocating aerator that could keep reciprocating and move at a snail pace or go back and forth while vertically tilling ....wouldn't that be ideal....?
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The only time I'd use an aerator for overseeding is if it was such a useless stand of grass that it needed to be dug up and virtually started over... otherwise punching all those holes in good grass is just a waste of time...
Compaction, Thatch, and getting nutrients/amendments into the rootzone... that is what aeration is for...