1. AFNOR (1995a) Soil quality—determination of organic and total carbon after dry combustion (elementary analysis). NF ISO 10694
2. AFNOR (1995b) Soil quality—determination of phosphorus—spectrometric determination of phosphorus soluble in sodium hydrogen carbonate solution. NF ISO 11263
3. AFNOR (1999) Soil quality—chemical methods—determination of cationic exchange capacity (CEC) and extractible cations. NF X 31–130
4. AFNOR (2003) Soil quality—particle size determination by sedimentation—pipette method. NF X31-10
5. AFNOR (2005) Soil quality—determination of pH. NF ISO 10390