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Hmmm.<p>One aeration is practically useless. Two practically useless aerations are.....useful?<p>What a ridiculus claim WITHOUT specifying the equipment used. With a standard LawnAire IV on a dry day, you're exactly right. But take a moist day, with a power tine recipricator, cross-aerate the lawn and you will wind up with a different result. Did the extension service specify?<p>I think there are some other factors at play other than annual or semi-annual frequency.<br>
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