Environmental Engineering Reference
In-Depth Information
warm-season turf-grass species are rarely used. When one species (or
even variety) occurs within a monostand of another species, it usually
disrupts the pleasant, consistent appearance of the turf area and becomes
regarded as an undesirable weed. The only instances in which mixed
turf-grass communities might be desirable in the tropics are those calling
for
winter overseeding.
At high elevations, where winter temperatures
drop below 10
C and turf-grasses go dormant for several months, cool-
season species may be overseeded into warm-season species to provide a
green turf while the warm-season species is brown and dormant. With
the coming of spring, the cool-season species gradually thins out and the
warm-season species takes the lead. To be effective in winter overseed-
ing, the cool-season turf-grass species should provide the shortest pos-
sible transition time from a green warm-season turf to a green cool-
season turf and a similar smooth transition back to the green, warm-
season turf in the spring. Overseeding is usually expensive and reserved
for high-quality turfs. Seeding rate is often 5-10 times higher than that
used for regular turf establishment, and because virtually all plants of the
cool-season grass die during the following summer, overseeding must be
repeated every year.
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