Cases of study : Cerrado region, large farmers company system? P. Grossa/PR : medium farmers Cooperation system
Diaporama upon 2 cases in Brasil (1 in cerrados, 1 in Parana subtropical): Evolution of the O.M. in quantity & quality with differents systems (DMC and till conventional)
Mots-clés : séquestration de carbone, plante de couverture, MOS, systèmes agraires, scv, biomasse