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Agronomy Journal Abstract -

Influence of Sulfur Sources and Magnesium on Forage Yields of Coastal Bermudagrass (Cynodon dactylon (L.) Pers.)1


This article in AJ

  1. Vol. 63 No. 3, p. 493-496
    Received: Nov 6, 1970

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  1. J. E. Matocha2



Yield response to sources and rates of S at three levels of Mg was studied on a Troup loamy fine sand.

Powdered gypsum, prilled elemental S and K-Mag were each applied at O, 50, and 200 kg S/ha. Forage yields were taken for two years following application of S and Mg. Yields in the first season were highest when 50 kg S/ha as gypsum was applied. The high rate of gypsum decreased yields in the first season but increased production in the second year. Prilled elemental S had no effect on yield the first year but gave significant response in the second year.

Magnesium decreased yields in both years. Addition of gypsum reduced the adverse effects of Mg and resulted in a significant S × Mg interaction on yields in the second year. Elemental S partially corrected the imbalance in plots receiving Mg alone. Magnesium failed to accentuate the response to elemental S and total yields were substantially less than for Mg plus gypsum or K-Mag.

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