 Soybean
Podcasts
Soybean Fertilization Research Results
December 14, 2009
(2 minutes: 20 seconds)
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(2 minutes: 20 seconds)
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MP4 (iPhone)
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Audio/Video Script:
Basically, the most important thing is rate. And we see
that both with our P and our K.
The data that we have to this date suggests the rate of application is more
important than the time that the fertilizer is applied.
The second really deals with round-up ready technology. We know
that the yellow flash that occasionally you see after round-up that is perhaps
due to manganese deficiency. [Picture of soybean plants - manganese deficient
beans.] We know that we have manganese deficient soils here in the state and
[Dr. Slaton] we know that if we do need manganese you need to put it out about 7
or 8 days after a round-up application. You do not need to mix manganese in with
round-up because it will antagonize the Round-Up activity and reduce weed
control.
The other thing is, especially in areas where we have built a lot of
reservoirs, soybean does not like low Ph. If you have silt-loam soils with low
Ph, your yields are probably going to suffer. So there is fine line there in
managing that soil Ph for rice and doing something for your beans to make sure
your not hurting your beans.
Poultry litter, it’s a fine nutrient source for beans.
The P and K availability appears to be equivalent to our inorganic
fertilizers. Certainly we would encourage you, because every load of poultry
litter, every house could be a little bit different and you need to have it
chemically analyzed for moisture content and nutrient content. If you are having
it delivered to your farm you need to sample it when it is delivered. If you do
not sample it until after is has been stacked on the turn row or in the field
and been rained on numerous times, [Dr. Nathan Slaton] you’re going to have to
put on a pair of hip boots, wade into that dude with a shovel and dig down until
you find some dry material.
Your Arkansas Soybean Podcast is a production of the University of Arkansas
Division of Agriculture and was funded in part by the Arkansas Soybean Promotion
Board. For more information on soybean farming in Arkansas contact your local
county Extension Office.
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