1. Estación Experimental de Aula Dei, Spanish National Research Council (EEAD‐CSIC) Zaragoza Spain
2. Isotope Bioscience Laboratory – ISOFYS, Department of Green Chemistry and Technology Ghent University Ghent Belgium
3. Autoridad Nacional del Agua, Dirección de Calidad y Evaluación de Recursos Hídricos Lima Peru
4. Soil and Water Management & Crop Nutrition Laboratory Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture Seibersdorf Austria