Superphosphate fertilizers
27 Superphosphate fertilizers
A fertilizer is a single superphosphate if – not less than 7% of the fertilizer is water-soluble phosphorus; and not less than 8% of the fertilizer is phosphorus that is both water-soluble and citrate-soluble; and not less than 10% of the fertilizer is sulphur; and not more than 2.5% of the fertilizer is fluorine; and not more than 3.5% of the fertilizer is iron and aluminium as a mixed oxide; and not more than 2% of the fertilizer is iron as an iron oxide.
A fertilizer is a double superphosphate if not less than – 13% of the fertilizer is water-soluble phosphorus; and 15% of the fertilizer is phosphorus that is both water-soluble and citrate-soluble.
A fertilizer is a triple superphosphate if not less than – 15% of the fertilizer is water-soluble phosphorus; and 17% of the fertilizer is phosphorus that is both water-soluble and citrate-soluble.
Subregulations (1), (2) and (3) do not apply to superphosphate that is mixed with another ingredient.
The statute text is free to read above. View subscription options to unlock the case-law research tools for each provision.