Division PFC 4: GROWING MEDIUM
United Kingdom
| Forms for the declared nutrient and other declared parameters | Permissible tolerances for the declared parameter |
|---|---|
| Electrical conductivity | ± 75 % relative deviation of the declared value |
| pH | ± 1,0 of the declared value |
| Quantity by volume (litres or m3) | ± 5 % relative deviation of the declared value |
| Quantity (volume) determination of materials with particle size greater than 60 mm | ± 5 % relative deviation of the declared value |
| Quantity (volume) determination of pre-shaped growing medium | ± 5 % relative deviation of the declared value |
| Nitrogen (N) extractable by CaCl2/DTPA (calcium chloride/ diethylenetriaminepentaacetic acid; ‘CAT-soluble’) | ± 75 % relative deviation of the declared value |
| Phosphorus pentoxide (P2O5) extractable by CaCl2/DTPA (calcium chloride/ diethylenetriaminepentaacetic acid; ‘CAT-soluble’) | ± 75 % relative deviation of the declared value |
| Potassium oxide (K2O) extractable by CaCl2/DTPA (calcium chloride/ diethylenetriaminepentaacetic acid; ‘CAT-soluble’) | ± 75 % relative deviation of the declared value |