Reducing and Minimizing Shock

Depending on your climate most grasses thrive at mowing heights   between 2 1/2"-3 1/2" inches.   
Lawns should be mowed so that no more than 1/3 of the leaf blade is removed at any one mowing.
As a result, healthy and vigorous lawns should receive more frequent mowing's to reduce and minimize shock.
Mowing grass that is wilted or otherwise in a weakened or stressed condition is not recommended and the lawn should be brought up to a healthy condition before frequent mowing operations commence.  Each time turf grasses are mowed, some injury to the plant occurs.  This bruising and tearing of the leaf tissue causes shock to the plant.  The best mowing practices are those that minimize the shock to the plant.

Sharp, clean and balanced lawn mowing equipment is also important to reducing shock and the spread of disease and insect.  Mowers blades need to be cleaned sharpened and balanced weekly during the growing season, another great DIY Project
Lawn Clippings

When proper mowing techniques are practices, and under healthy and established lawn conditions. lawn clippings SHOULD NOT be bagged or removed from the turf area.
Lawn clippings will disintegrate quickly, returning to the organic materials and nitrogen to the soil, which is the equivalent of adding one fertilizer application per season.

Mulching Mowers

The grass clippings left behind by a mulching mower essentially function as a lawn fertilizer,  and are clipping left on the lawn add up to as much as one additional fertilizer per season.  Mulching mowers don't actually make mulch, rather cut up the grass into fine partials.  For this reason, it makes more sense for most  homeowners to use a mulching mower, rather than bagging their grass clippings and dumping them in the compost pile.
Mulching lawn mowers are designed so as to leave behind shredded grass clippings. Such clippings can be left on the lawn
Most residential situations will do fine with a rotary mower that either mulch's or not.   
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Lawn Mowing

Lawn mowing can be considered the most basic of landscape practices  Turf grasses are one of the few plants that we walk, run, play football and even drive on, all in all, still wanting it to be weed and insect free and a show a vigorous green carpet of color.  Lawn mowing is the first of many steps to maintaining a successful lawn.  In most growing seasons, with proper maintenance, water and fertilizing,  lawns are mowed every 5-7 days starting in April.  This rate is typically dropped back to every 7-10 days in the summer months and then picks back up again in the fall to 5-7 days.  Most residential properties average 25 mowing's between April and November.