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According to the Turfgrass Extension and Outreach program at UIUC, every mowing should remove one third of the grass blade's height. [http://what-if.xkcd.com/70/]
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![According to the Turfgrass Extension and Outreach program at UIUC, every mowing should remove one third of the grass blade's height. [http://what-if.xkcd.com/70/]](/preview/0/91/912892.jpg)