What sulphur fertilizers are available?
Most sulphur-containing fertilizer materials generally can be divided into two groups: 1) fertilizers containing sulphate, and 2) fertilizers containing elemental sulphur. Sulphate-containing fertilizers provide most of the fertilizer sulphur applied to soils. The most significant and popular sources are ammonium sulphate, single superphosphate (SSP), potassium sulphate, potassium magnesium sulphate, and gypsum. These materials have the advantages of supplying sulphur primarily as a component of multi-nutrient fertilizers in a sulphate form that is immediately available for plant uptake. Elemental sulphur-containing fertilizers are the most concentrated sulphur carriers. However, elemental sulphur has to be oxidized into sulphate form before plant products, such as granular sulphur-bentonite, have improved the effectiveness of elemental sulphur by providing elemental sulphur in an acceptable physical form so that it can be used for direct application and bulk blending with little dust
