METRO – Homeowners who don’t look forward to dusting off their rakes each fall might be happy to learn that mulching fallen leaves with a mower may be a healthier and less labor intensive way to confront a yard covered in leaves. For 20 years, turfgrass specialists at Michigan State University studied how lawns reacted to having ground up leaves left on the lawn and the results were overwhelmingly positive. Researchers found that tiny pieces of mulched leaves eventually sifted down through the turf and provided the lawn with essential nutrients. Mulched leaves also served to control future weed growth by covering up bare spots between turf plants. Such spots typically provided openings for weed seeds to germinate and ultimately infect lawns. In fact, researchers found that mulching leaves for just three years could produce a nearly 100 percent decrease in dandelion and crabgrass growth. Homeowners with mulching mowers that also have bags can even help their gardens by alternating using the mower with and without the bag on once leaves begin to fall.