%0 Generic %D 2008 %E van der Burgt, Ir. G.J.H.M %E Timmermans, Dr. B.G.H. %F orgprints:13548 %K Nitrogen, soil, research, modelling %T Soil Nitrogen: research and extension %U http://orgprints.org/13548/ %X These are the proceedings of the 4th QLIF workshiop with contributions of several European soil and nitrogen researchers.