Sulfur Uptake by Corn as Influenced by Ammonium and Nitrate Nitrogen
1970
Rehm, G. W. | Caldwell, A. C.
The effect of NH₄ and NO₃ ions on S uptake by corn (Zea mays L.) from a starter fertilizer was studied with the use of ¹⁵N and ³⁵S. When both the N and S were applied as a starter, the uptake of fertilizer S was significantly increased when NH₄ instead of NO₃ was used as the N source. This effect was observed in young plants through 4 weeks of age. More N was absorbed by the corn plant when NH₄ rather than NO₃ was supplied as the N source. The N source, however, had no significant effect on the total S, SO₄-S or total N content of the tissue and the corn yield.
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