Roundup Ready Alfalfa in
Pasture at Haskell, OK
Alfagraze 300 RR was planted April 4, 2006 at the Eastern Research
Station
Roundup applied in strips May 17, 2006
Images March 15, 2007
Views of
AlfaGraze 300RR planted in April 2006. Roundup was sprayed to
suppress grass competition just after the alfalfa seedlings began to
grow. By July the alfalfa was well established and was grazed for about
six weeks then allowed to rest. Grazing restart
in early January. Freezing temperatures stopped bermudagrass growth
and the alfalfa is allowed to grow longer into the fall or winter.
As bermudagrass regrows during the next spring it will encroach into the
alfalfa but can be suppressed again with Roundup as needed to maintain a
mixture of grass and legume.
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See
May 31, 2006 for
more details. |
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Little
grass grows in the sprayed strips where bermudagrass and tall fescue was
sprayed with Roundup during spring 2006. Alfalfa plants form a
near solid stand. In the unsprayed strips between the alfalfa
strips is dormant bermudagrass, a little tall fescue and cool-season
weeds. Narrow (approx. 1 ft.) unsprayed strips seem too narrow
resulting in nearly 100% alfalfa stand. |
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Same as
above. Different angle. |
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Close up
of area where alfalfa stand is thin leaving places for cool-season weeds
to grow. Sprayed in February to control competition from
cool-season grasses. |
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Same as
above. |
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Fall-sown alfalfa with volunteer arrowleaf clover and cool-season annual
grasses growing in dormant bermudagrass. |
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Same as above. |
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Same as above but closer
up. |
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Fall-sown alfalfa in
February-Roundup-sprayed strip (left and center). Area to right
was not sprayed and cool-season grasses are still competitive. |
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View looking down drill
strips of fall-sown alfalfa and across strips sprayed with Roundup in
February |
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Same as above but closer
up.
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