Current world fertilizer situation and outlook 1997/98 - 2003-04

abonos abonos fosfatados abonos nitrogenados abonos potasicos comercio exterior commerce extérieur consommation consumo consumption datos estadísticos demand demanda demande engrais engrais azoté engrais phosphaté engrais potassique fertilizers foreign trade nitrogen fertilizers oferta offre phosphate fertilizers potash fertilizers precios prices prix producción production statistical data supply