Response of Tifway Bermudagrass to Sulfur on Sandy Soils1
- G. M. Volk and
- G. C. Horn2
It was the purpose of this investigation to determine if previously reported differential growth and color response of Tifway bermudagrass (Cynodon dactylon L. Pers.) on a loamy fine sand to various N and K sources in field plot tests correlated with S applied in these materials and S percentages in the grass. The growth response to (NH4)2SO4 over NH4NO3 correlated positively with S percentage increase in the grass. Subblock treatments of K sources within the 2 N sources showed a growth response and S percentage increase in the grass in increasing order for K2SO4, KCl, SuL-po-mag, and K2CO3, which did not follow the S applied as a component of the K source. Retention of applied SO4-- by the mineral subsoil was negligible, but increase in total S in the surface soil probably was the result of build-up of organic S during a 4- year period. There was no differential effect of NH4 + vs. NO3 on the uptake of S at the average N/S ratio of 12.5 and average S percentage of 0.35 in the grass. It is suggested that sulfate-S application be coordinated with N application frequency on sandy soils.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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