The purpose of this study is to evaluate the use of Thio-Sul® in a sidedress application at the V6 growth stage, in an attempt to increase nitrogen (N) use efficiency, plant health, yield and profitability.

Higher yielding corn crops require more sulfur (S). Because there has been reduction in S emissions due to the Clean Air Act, S deficiencies are becoming more common in corn production. Sulfate S is very mobile in the soil, similar to nitrate nitrogen, due to its negative charge. Additionally, organic matter is the primary source of S in most soils. Because of this, S deficiencies are most common in lighter, sandy soils with low organic matter. Some research suggests that S increases N use efficiency, which is why we tested S with two different N rates. While we did observe a yield gain with the S applications, it was not substantial enough to result in a positive return on investment.

 Fall: Disk-Rip, Spring: Field Cultivation | 

*®XL, Optimum, and AcreMax are registered trademarks of Pioneer. XL® brand seed is distributed by Beck’s Superior Hybrids, Inc.

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