Why did grass form?

A grass plant's ultimate goal is to grow up, put up an inflorescence, have it pollinated, then as it dies, allows those seeds to be spread by wind or animal life. Daughter tillers lie in wait for the next perfect set of growing conditions to grow again, either later in the year, or same time next year.

When a grass is grazed or mowed prior to reaching that ultimate goal, it is forced to go back to "square one" and start regrowth again to make another attempt to that ultimate life-goal of a grass plant. This is primarily why grasses will grow after grazing.

The other reason grasses will grow after grazing is because of the environmental conditions still supporting its ability to do so: Sunlight, good soil temperature, adequate moisture, active microbes in the soil giving it the nutrients it needs in exchange for extra liquid carbon, the works. Once those conditions become less than good for growing, a grass plant will slow growth down to a crawl, like molasses in winter.

But the key for grazing is to graze a grass plant before it has both reached maturity and just before it has started to push up an inflorescence. Doing so gives good quality for the livestock, and the necessary boost needed to get that grass to grow back once those animals have taken the single bite that needs to be taken from that plant before being moved on.

This, folks, is what good grazing management is pretty well all about.