1 Laboratory of Soil Science, School of Agriculture, Aristotle University of Thessaloniki, University Campus, 541 24, Thessaloniki, Greece. egolia@agro.auth.gr.
2 Laboratory of Soil Science, Department of Agriculture, Crop Production and Agricultural Environment, University of Thessaly, 384 46, Volos, Greece. egolia@agro.auth.gr.
3 Laboratory of Chemical Engineering and Engineering Sustainability, Faculty of Pure and Applied Sciences, Open University of Cyprus, Giannou Kranidioti 33, 2220, Latsia, Nicosia, Cyprus.