Farming and agroindustrial digestate produced by agricultural biogas plants not only falls within the qualitative limits imposed by the Italian Ministerial Decree on digestate but can also be classified as an organic fertilizer of excellent quality! These limits concern the content of organic substances, nitrogen, phosphorous and heavy metals and are the same set for fertilizer products which can be freely marketed. But how do we assess the chemical and microbiological quality of the digestate? All the information is available in the “Guidelines for the agronomic use of digestate” produced by the CIB (Italian Biogas Consortium).