?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=David%2C+Christophe&rft.aulast=David&rft.aufirst=Christophe&rft.date=2007&rft.title=Improvement+of+the+soil-crop+model+AZODYN+under+conventional%2C+low-input+and+organic+conditions&rft.genre=proceeding