UGent is coordinator of WP3 of the project. The objective of this WP is to develop and evaluate the effectiveness and impact of existing and new biofertilisers from crop residues, livestock effluents and bioenergy effluents. In order to address this objective, this WP will quantify the fertilization potential of agricultural waste materials (straw, crop and animal residues, rice bran, etc) including new biofertilisers, and the impact on soil quality and soil organic carbon stocks; assess environmental impacts of agricultural waste materials including new biofertilisers, especially on water quality; formulate farming practices recommendations and guidelines concerning the use of new biofertilisers. UGent will particularly contribute i) in the characterization of the AWCB with respect to nutrient availability on short and medium term, in particular nitrogen availability; ii) in estimating the contribution of AWCB to carbon sequestration in soils and greenhouse gas budgets; iii) in modeling the risk of nutrient losses (nitrogen and phosphorus) to ground- and surface water upon application of AWCB.