1. Interdepartmental Research Centre of Nuclear Magnetic Resonance for the Environment, Agri-Food and New Materials (CERMANU) - University of Naples Federico II, Via Università 100, 80055 Portici, Italy
2. Plant Sciences, Terra Teaching and Research Center, Gembloux Agro-Bio Tech, University of Liège, Belgium, 2, Passage des Déporte, B-5030 Gembloux, Belgium
3. Department of Agro Environmental Chemistry and Plant Nutrition, Czech University of Life Sciences Prague, Kamýcká 129, 165 00 Prague 6, Suchdol, Czech Republic
4. Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, 80055 Portici, Italy