DiverIMPACTS will produce data that include data from measurements carried oud in a network of 10 field experiments. This network was built across Europe (7 countries) covering a range of pedo-climatic conditions and different farming systems: arable and vegetable systems both under conventional and organic management. Each field experiment will test one or several diversified cropping systems combining three strategies of diversification with low input practices compared to a reference system less diversified and more dependent on external inputs. The three strategies of crop diversification are a) rotation, b) multiple-cropping (growing different crop species on the same land within a growing season) and c) intercropping (growing different species in proximity in the same field. The WP3 database must give an access to information that could help diversification initiatives by the demonstration of the multiple benefits of different strategies of diversification (in time and space) at the cropping system level and the decision rules for their design and their management in different contexts This deliverable explains: the type of data and metadata collected in this network the structure of the data base and tools the structure of the field experiment data base