International Fertilizer Development Center2007-11-121989-04-012007-11-121987http://hdl.handle.net/10625/3056Text1 digital file (89 p. in various pagination)Application/pdfenFERTILIZERSRESEARCH PROGRAMMESWEST AFRICACROP YIELDREGIONAL COOPERATIONNITRATESPHOSPHATESSULPHURRESEARCH RESULTSFinal report (Phase I) / Fertilizer Network (IFDC / West Africa)IDRC Final Report