Chapter 5 Turf Management Mowing Exam Study Guide Questions and Answers
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Course
Environmental turf grass management
Institution
Environmental Turf Grass Management
mowing can affect what? - Answer-physiology and growth of turfgrasses drastically. As discussed in Chapter 1, most of the photosynthetic process takes place in the leaves. As leaves are removed through mowing, carbohydrate production and storage are reduced. By lowering the cutting height, a mower ...
Chapter 5 Turf Management Mowing
Exam Study Guide Questions and
Answers
mowing can affect what? - Answer-physiology and growth of turfgrasses drastically. As
discussed in Chapter 1, most of the photosynthetic process takes place in the leaves.
As leaves are removed through mowing, carbohydrate production and storage are
reduced. By lowering the cutting height, a mower operator can cause the number and
growth of new shoots to increase.
as a result of reduced photosynthetic what happens - Answer-area and increased
demand for carbohydrates for shoot growth, root growth will be severely restricted.
Shoots have priority over roots for available carbohydrates, so the severity of root
reduction is directly related to the height of cut. Lower cuts will produce a shallower root
system
Reduced carbohydrate reserves and restricted root growth will what? - Answer-can
weaken the turf's ability to withstand and recover from environmental stresses such as
extreme temperatures and drought
when to much foliage is removed what happens? - Answer-the amount of insulation for
the crown and other growing points of the shoots is reduced, so that during periods of
high or low temperature the sensitive growing points are more exposed and may be
damaged.
close-cut turf without an adequate "cushion" will what? - Answer-will result in reduced
tolerance for wear. Close-cut turfs also show poorer drought tolerance because of their
weaker root systems. Height of mowing can also affect the occurrence of diseases.
Some diseases, such as leaf spot, rust, and dollar spot, are more evident on close-cut
turfs, while snow mold may be more severe on turfs cut excessively high
cutting height - Answer-refers to the height of the grass just after mowing, which may be
different than the height expected after setting the mower. Usually the mower height is
adjusted on a flat, level surface, so this height may not be realized if the turf is thatchy
or the ground is uneven. In either case, the wheels may sink, causing more foliage to be
removed than expected.
Five factors determine the best cutting height for any turf area: - Answer-Turfgrass
species
Use or purpose of the area
Environmental conditions
, Health of the turf
Mower type
the turf grass species is what? - Answer-the main factor determining cutting height. The
location or height of the crown tissue is unique for each species. Some species, such as
tall fescue or St. Augustinegrass, have elevated crowns, so they are likely to suffer
significant thinning and loss of vigor if the cutting height is too low. On the other hand,
creeping bentgrass and the hybrid bermudagrasses have crowns located very close to
the soil surface. They tolerate close mowing and, in fact, perform best under very close
mowing.
use of the area will also dictate what? - Answer-the cutting height. A golf course putting
green should be mowed at 0.25 inch (0.6 cm) or lower; any height greater than this
would be unacceptable for play. Similarly, cutting heights of most athletic fields should
be in the 0.75 to 1 inch (1.9 to 2.5 cm) range. This height will allow maximum running
speed for the players. In most cases, home lawns and general turf areas should be
maintained at the upper limit specified for the given species.
Environmental conditions also play an important what? - Answer-role in selecting
mowing heights. Turfgrass growing in the shade should be mowed as high as feasible
to maximize the photosynthetic capability of the turf. Temperature is also a
consideration, since the height of cut will determine the amount of protection afforded
the turf during extreme weather.
the cutting height of many cool-season turfgrasses should be what? - Answer-should be
raised in the summer to encourage deep root growth and insulate the crown from high
temperatures
warm season turf grasses should be what? - Answer-be mowed slightly higher in the
summer to reduce the frequency of mowing and irrigation. However, in the spring,
warm-season turfs can be mowed low to aid in thatch control, speed spring "green-up,"
and increase shoot density. In the fall, warm-season turfgrasses should be mowed
slightly higher for protection against low temperature injury during the winter.
The physiological health of the turf should also what? - Answer-play a role in
determining cutting height. For example, while the turf is recovering from damage
caused by pests, environmental stress, or improper management practices, it is best to
avoid close mowing so maximum root and shoot growth can occur.
The type of mower available will also play a role in what? - Answer-determining the
mowing height used. As discussed below, reel mowers are best suited to turfgrasses
and areas requiring very close (less than 1 inch or 2.5 cm) mowing. On the other hand,
rotary and flail mowers are more versatile and can be used when cutting heights up to 3
inches (7.5 cm) or higher are necessary.
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