Directive reference – Art 9; Annex II; Arts 19–20
Reference methods are the standard laboratory methods: ISO 11277 for texture, ISO 10694 for SOC, ISO 11272 for bulk density, ISO 11263 for P-Olsen, ISO 10390 for pH, ISO 11260 for CEC, ISO 11261/13878 for nitrogen, ISO 11274 for water retention, ISO 17313 for hydraulic conductivity, and aqua regia digestion for heavy metals (Annex II B, verify). A transfer function is a validated relation that converts results from another method to the reference one, which is relevant for Tyurin humus and Kachinsky texture in Bulgaria (Annex II B, verify).
An accredited laboratory is accredited to ISO/IEC 17025 for the methods used (Art 9). Remote sensing for sealing uses Copernicus services or better data, complemented by national inventories (Annex II C, verify). Reporting is six-yearly, with the first report due 17 June 2032 (Art 19, verify), and public information covers publication of aggregated results and the register (Art 20).