Compliance methods for N- and P-BBFs

Summary in the original language of the document

Bio-based fertilisers (BBFs) have gained popularity as a more sustainable source of nutrients in agriculture than conventional synthetic or mined fertilisers, but predicting the nitrogen (N) and phosphorus (P) bioavailability of BBFs is crucial for their proper and efficient use in griculture. To address this, we conducted a comprehensive assessment of potentially mineralizable N and carbon (C) content, as well as NH3 volatilisation, for a representative selection of 42 N-BBFs, and explored various chemical extraction methods to predict their N bioavailability. With respect to P-BBFs, we tested the P extractability of thirty BBFs through six different extraction methods and related P extractability to P uptake as determined by a suite of three pot experiments conducted up to maturity in different soils and conditions.