Shore, K.2007-11-132001-09-242007-11-132001http://hdl.handle.net/10625/17682French version available in IDRC Digital Library: Nourrir le sol : la roche comme engrais phosphate1 digital fileenPHOSPHATESFERTILIZERSSOIL IMPROVEMENTRESOURCES EXPLOITATIONAFRICA SOUTH OF SAHARAFood for the soil : rock phosphate as fertilizerJournal Article