Division 2 A solid organic fertiliser shall contain at least one of the following declared primary nutrients: nitrogen (N), phosphorus pentoxide (P2O5) or potassium oxide (K2O).
United Kingdom
Where a solid organic fertiliser contains only one declared primary nutrient, that nutrient content shall be at least the following:
- (a)
2,5 % by mass of total nitrogen (N),
- (b)
2 % by mass of total phosphorus pentoxide (P2O5), or
- (c)
2 % by mass of total potassium oxide (K2O).
Where a solid organic fertiliser contains more than one declared primary nutrient, those nutrient contents shall be at least the following:
- (a)
1 % by mass of total nitrogen (N),
- (b)
1 % by mass of total phosphorus pentoxide (P2O5), or
- (c)
1 % by mass of total potassium oxide (K2O).
The sum of those nutrient contents shall be at least 4 % by mass.