Walk-Behind Push Mowers
The simplest type of power lawn mower
is basically a push mower with an engine - the engine then both rotates the cutters
and drives the machine forward. In the last twenty or thirty years, it is also
common to find this type of mower with an electric motor as the power source,
though this has the disadvantage of requiring a trailing power cord which limits
its range, so these are only useful for relatively small lawns close to a power
socket. There is also the obvious hazard with these machines of the possibility
of mowing over the power cable.
Proper mowing is important in creating a good-quality lawn
because it encourages a dense stand of grass plants. A dense turf keeps out weeds
through competition for sunlight and nutrients. A weak, thin turf allows weed
seeds to germinate and grow.
more at Clemson University
Mowing height is the key to keeping grass uniform and attractive.
Most lawns in North Dakota are a mix of Kentucky bluegrass and red fescue. You
should mow this type of lawn two to three inches above the soil line. Grass cut
to this height shades the soil and helps keep weeds from establishing themselves.
Shade also keeps the soil temperature cooler.
more at North Dakota State University
Warmer temperatures and lack of moisture usually slow grass
growth in summer. If moisture is adequate, cooler temperatures speed growth again
in fall as plants store food in their roots.
more at Cornell University