Paragraph 7
The content expressed in terms of the elemental forms Phosphorus (P), Potassium (K) and Magnesium (Mg) shall be shown in parentheses alongside the oxide declarations referred to in paragraph 6. The following factors shall be used to convert the oxide numerical values to the elemental form:—
(a)
Phosphorus pentoxide (P2O5) × 0.436 = Phosphorus (P);
(b)
Potassium oxide (K2O) × 0.83 = Potassium (K); and
(c)
Magnesium oxide (MgO) × 0.6 = Magnesium (Mg).