title: Biochar trials aim to enrich soil for smallholders.
authors.forename: William I
authors.initials: WI
authors.lastname: Woods
authors.forename: Newton P S
authors.initials: NP
authors.lastname: Falcão
authors.forename: Wenceslau G
authors.initials: WG
authors.lastname: Teixeira
mesh_terms: D000383:Agriculture / Q000191:economics* / Q000379:methods* / Q000639:trends; D001938:Brazil; D003226:Congresses as Topic; D003246:Conservation of Energy Resources / Q000191:economics / Q000379:methods* / Q000639:trends; D005069:Evaluation Studies as Topic; D014481:United States