soil management / natural systems / symbiotic systems / soil systems / fossil energy / nitrogen-fixing systems / /
Organization
Food and Agriculture Organization of the United Nations / Swedish International Development Authority / United Nations / Azolla-Azolla / F000 AND AGRICULTURE ORGANIZATION OF THE UWITED NATION / Legume-Rhizobia Association / /
Person
Y.A. Hamdi / /
Position
author / delegate and invited speaker / General / /