Overpopulation exists in an extreme form when it comes to your lawn. A square foot of your lawn can hold up to thousands of pieces of grass. With that in mind, remember they're all battling for food.
Fertilizer is important, but there's an ideal way to do it. More isn't necessarily always better. Courtesy of the DIY Network, follow these tips for fertilizing your lawn, and you will cultivate the healthiest lawn in your neighborhood.