Seminole Crop E News

Agricultural News for Farmers and Agribusiness in SW Georgia

Sidedress Time on Cotton

Posted by romeethredge on June 12, 2013

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Our oldest cotton is squaring now so it is time to start thinking about sidedressing fertilizer. Here’s some that was being sidedressed today.

The following is taken from Dr. Glen Harris, UGA Extension scientist’s, writings in the 2013 UGA Cotton Handbook. The total Nitrogen rate should always be applied in split applications. Apply 1/4 to 1/3 of the recommended N at planting and the remainder at sidedress. The preplant or at planting N application is critical for getting the crop off to a good start and ensuring adequate N nutrition prior to side-dressing.

Sidedress N between first square and first bloom depending on growth and color (toward first square if slow growing and pale green, toward first bloom if rapid growth and dark green). A portion of the sidedress N can also be applied as foliar treatments or through irrigation systems. No N should be soil-applied (either top dressed or through the pivot) after the 3rd week of bloom. Studies have shown that uptake of soil-applied N from by cotton roots is basically ineffective after this critical point.

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