A number of methods have been devised for the estimation of sulphur in soils. Unfortunately, none of these methods to date have been accepted as fully satisfactory for all conditions. This study was conducted to compare the Turbidimetric and Atomic Absorbtion Spectrophotometric methods for the determination of extractable soil-sulfate and to evaluate some of the most promising extractants for assessing the availability of SO₄-S using a tracer technique as the standard for comparison. Seventeen representative soil samples having a broad range of chemical and physical characteristics were collected. To investigate the S status of these soils, a growth chamber experiment was set up with wheat as the test plant. S was applied as Na₂SO₄ at the rate of 0 and 20 ppm S (35 mgS/pot). For determining the A-value, the S₁ dose was labeled with radioactive-sulphur (2.28 μCi/mgS). After 45 days of growth, plants were harvested and dry matter (g/pot), S content (%), S uptake (mg/pot) determined. Six selected chemical solutions (500 ppm P containing Ca(H₂PO₄)₂H₂O and KH₂PO_4; 0.15 % Cacl_2; NAOAc+HOAc; 0.5 MNaHCO_3; H₂0) for determining an index of available soil-S by using two methods were compared with A-value. The highest coefficient of correlation value was obtained with 0.15 % CaCl₂ reagent for two methods. This method appeared worthy of consideration as a routine test for assessing the extractable-S for these soils. This study also indicated that AAS method was faster and more reliable than turbidimetric method for determining soil SO₄-S.