This is one of those ancient bits of "wisdom" I vaguely recall from my childhood; and now that I have a lawn which seems quite happily established, I'm looking into keeping it that way. So, I want to know if there's any truth to it.
Supposedly, each time you mow your lawn, you should change the direction you mow. For example, travel north/south one mowing, then east/west the next mowing.
It's obvious if you look at a freshly mown lawn which direction the mower traveled, which I think lends this idea its believability. But I can't honestly think of any benefit to the plants. After a day or two they're all still happily growing "up" after all. And with a motorized spinning blade, I don't see how you could say that a blade of grass was cut "this way," anyway.
So, is there something I'm missing? Is there some benefit to the plants? Or is there some quirk of reel mowers which made it true in the past; and if so, is it still true?