Fertilizers Regulations 2017
26Reactive phosphate rock fertilizers
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26 Reactive phosphate rock fertilizers
(1) A fertilizer is a reactive phosphate rock fertilizer if –
(a) it is derived only from naturally occurring deposits of calcium phosphate; and
(b) contains not less than 12% phosphorus.
(2) A reactive phosphate rock fertilizer that is not highly reactive or moderately reactive is not to be sold.
(3) A fertilizer is a highly reactive phosphate rock fertilizer if 65% or more of the total phosphorus in the fertilizer is soluble in 2% formic acid.
(4) A fertilizer is a moderately reactive phosphate rock fertilizer if between 50% and 64% of the total phosphorus in the fertilizer is soluble in 2% formic acid.
(5) For the purposes of subregulations (3) and (4) , a sample of reactive phosphate rock fertilizer must not be ground before testing its solubility in 2% formic acid.