SOA SOUTHERN GRADE: The SOA product is a by product from the coke making process. The product is a grey/white fertiliser around 1mm in size and has good levels of Nitrogen and Sulphur. If you can get away with crystalline powdery product and not granules you can apply a cheaper Southern Grade ammonia sulphate fertiliser through a standard fertiliser spreader. Where conditions exist for high nitrogen losses through volatilisation of Urea, SOA can be used more efficiently as its nitrogen is in the ammonium form.
It is ideally suited for use in crops such as canola which have a high sulphur demand, and in grain crops and pastures. The sulphur is in the sulphate form, so it is immediately available to the plant making it ideal for use in annual cropping programs.
