Influence of the composition and agglomeration pressure on the compaction level of the fertilizers based on biomass ash and digestateMarek Wróbel, Jarosław Frączek, Krzysztof Mudryk, Marcin Jewiarz and Krzysztof DziedzicBIO Web Conf., 10 (2018) 02035DOI: https://doi.org/10.1051/bioconf/20181002035