The Determination of Available Sulfur in Soils

Kilmer, Victor J.; Nearpass, D. C.

The Determination of Available Sulfur in Soils

1960

Kilmer, Victor J. | Nearpass, D. C.

A laboratory procedure was sought which would determine available sulfur in soils. As finally evolved, the method consists of extracting the sulfur with 0.5M NaHCO₃ at pH 8.5 and determining sulfur in the extract by the Johnson-Nishita procedure. Sulfur determined in this manner correlated very well with sulfur “A” values, an “r” value of 0.89 being obtained for 30 surface soils. Soils having < 10 ppm. S as determined by the proposed procedure generally responded to applications of sulfur.

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