Organic phosphorus immobilization in microbial biomass controls how N2-fixing trees affect phosphorus bioavailability in two tropical soils oleh Kittima Waithaisong, Agnès Robin, Valentin L'Huillery, Josiane Abadie, François-Xavier Sauvage, Patrick Chemardin, Louis Mareschal, Jean-Pierre Bouillet, Jean-Paul Laclau, José Leonardo Moraes Gonçalves, Claude Plassard