The extended
periods of hot, dry weather that most Georgians have experienced over the past few
summers has taken a toll on many of the permanent forage grasses. This is especially true of cool season
grasses like fescue and orchardgrass in North Georgia. Many of these producers with declining forage
stands are considering establishing bermudagrass.
If you are
considering establishing bermudagrass, you have probably realized there are
several options. Certain varieties can
be established by seeding, others by using clippings (tops) and some with
vegetative sprigs. Vegetative sprigs can
be used in both prepared soil and no-till situations. For more information on bermudagrass
varieties grown in Georgia, refer to “Selecting
a Forage Bermudagrass Variety”
Proper preparation is the key to good
bermudagrass establishment.
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This article will focus on getting your field ready to sprig
bermudagrass into prepared soil.
Establishing a field in bermudagrass is a long-term commitment so you
need to be sure the site is well prepared before putting out the first sprig.
As with most
all agronomic crops, a good place to start is determining soil fertility needs
by soil testing. While you are waiting
to get the soil test results back, you can destroy any existing vegetation by
spraying the area with a non-selective herbicide. One very troublesome weed that is often found
in these sites is common bermudagrass.
Common bermudagrass is virtually impossible to remove once the field is
established and should be controlled prior to sprigging. Keep in mind that common bermudagrass must be
green and actively growing for the non-selective herbicide to be effective.
Once your
soil test results are back and you have burned-down existing vegetation with a
herbicide, you are ready to apply the recommended lime and/or soil
nutrients. Of the three major plant
nutrients (nitrogen, phosphorus, and potassium), adequate potassium levels are
critical to maintain a healthy bermudagrass stand. Any needed nutrients (and lime if required)
can be spread at this point so it will be incorporated into the soil root zone
during the tillage process.
As mentioned
earlier, bermudagrass is a long term crop and proper tillage prior to sprigging
can help relieve soil compaction issues and smooth the soil surface. Deep plowing and disking will get the soil
well prepared and allow for any leveling/smoothing of the soil surface that may
be needed. Once the soil is prepared it
should be packed to ensure consistent planting depths. If this tillage is completed a month prior
to sprigging, it will give weeds a chance to germinate and a non-selective
herbicide can be used again to eliminate all vegetative growth. Hopefully, during this post-tillage time
period you will receive enough rainfall to get adequate soil moisture that is
needed for sprigging.
If you take
the time to control weeds, adjust soil nutrients/pH level, get the soil well
prepared, and obtain good soil moisture, you will greatly increase the success
rate of your new bermuda field. Once you
have completed all these steps you are ready to call the sprigging
contractor. Go to
http://www.caes.uga.edu/commodities/fieldcrops/forages/newinfo/BermudagrassSpriggersinGeorgia.pdf
on the Georgia Forages web page for a list of spriggers in Georgia.
Norman Edwards
UGA Cooperative Extension - Walker County CEC
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