NDSU Extension - Burke County


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Soybean FAQs (continued)

Soybean FAQs (continued)

County Agent News
Dan Folske
March 6, 2017

Soybean FAQs (continued)

How important is inoculation?

 Very Important! Research at Carrington showed only a very slight yield advantage for inoculation Bag of Soybeansoybean seed if fields had a long history of soybeans. However, if soybeans have not previously been planted on a field inoculation is critical and double inoculation is recommended.
Can I just double the rate of my inoculant for double inoculation?

            No, one of the main reasons to double inoculate is to insure inoculation takes place even if an inoculant fails. Just doubling the rate of one type of inoculant does not provide that insurance.
Can I use pea or lentil inoculant?

No, the rhizobia species is very specific for soybeans.

Can I have my seed inoculated several weeks before planting?

            No, The shorter the time between application of a liquid inoculant and planting the better. Leaving inoculated seed on a truck in a hot steel building or in a hot sun for several days is an almost sure way of guaranteeing inoculant failure.

How deep should I plant soybeans?

            Recommended seeding depth is about 1½ inches. Soybeans need to absorb a lot of moisture to germinate. Shallower seeding makes them very dependent on rainfall and is likely to result in poor or uneven emergence.

Can I plant soybeans on pea stubble?

            It is not a good idea. Many of the same diseases may affect both crops. Besides, it generally makes more sense to plant a crop which needs the nitrogen fixed by the peas and plant the soybeans into wheat or durum stubble which will be short on nitrogen and also have less chance of disease.

I am planting a Roundup Ready soybean. Do I need any other herbicide?

            It is never a good idea to depend solely on one herbicide. A pre-plant or pre-emergence herbicide will help with early season weed control allowing you to delay your first glyphosate application and reduce the chances of developing glyphosate resistant weeds in your field.




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