Compliance methods for different types of BBFs

Compliance test methods used in EC 2003/2003 (total/easily soluble), as well as electro ultrafiltration (EUF; Nemeth 1982), diffusive gradients in thin films (DGT) and iron oxide-filled dialysis bags will be evaluated as compliance test procedures.In addition to the experimental work, the national fertiliser regulations of all EC member countries for P fertiliser regulations on P content and easily soluble fraction will be screened with special focus on organic fertilisers. Based on the experimental and screening results in this task, suitable P content/solubility compliance methods for BBFs will be reported. Emerging BBFs (e.g. developed under topic SFS-39-2019, RUR-08-2019-2020) will be tested with the compliance methods introduced.