**5. Acknowledgment**

The authors wish to thank the following: AkzoNobel for funding the presented research, P. Weijters and M. Bugter for initiating the research project, Prof. W.H. van Riemsdijk and Dr. A.M. Reichwein for their contributions to the articles on which this chapter is based, Prof. R.J. Goos for providing the Mycogen 5072 seeds, P. Nobels for his help with the ICPanalyses, W. Menkveld, A. Brader and P. Pellen for plant care and J. Nelemans for advice and practical support.
