additif (1) sol (1) comportement (1) nitrate (1) irrigation (1) expérience scientifique (1) Union européenne (1) protection de l'environnement (1) agriculture (1) politique agricole commune (1) ligne (1) étude expérimentale (1) Control (1) Agriculture (1) Sustainable agriculture (1) Zone of aeration (1) Volcanic ash, tuff, etc (1) Soils (1) Nitrates (1) Mixtures (1) Irrigation water (1) Irrigation (1) Environmental protection (1) Agriculture (1) Addition (1) Acre (1) European Union (1) Utilization (1) Soils (1) Reference (1)