1. NF ISO 11263. Soil Quality ― Determination of Phosphorus - Spectrometric Determination of Phosphorus Soluble in Sodium Hydrogen Carbonate Solution;AFNOR,1995
2. NF ISO 10694. Soil Quality — Determination of Organic and Total Carbon after Dry Combustion (Elementary Analysis);AFNOR,1995
3. NF ISO 13878. Soil Quality — Determination of Total Nitrogen Content by Dry Combustion (“Elemental Analysis”);AFNOR,1998
4. NF X31-160. Qualité des sols – Détermination du phosphore soluble dans une solution à 20 g.l-1 d’acide citrique monohydraté – Méthode Dyer;AFNOR,1999
5. NF X31-107. Soil Quality - Particle Size Determination by Sedimentation - Pipette Method;AFNOR,2003