Response of rice (Oryza sativa L.) to Cu and Zn in the presence of NPK

abonos de oligoelementos abonos fosfatados abonos nitrogenados abonos potasicos application rates caracteres de rendimiento cinc cobre composante de rendement composition globale copper copper sulphate crecimiento croissance crop yield cuivre dose d'application engrais potassique fertilisation fertilizer application growth micronutrient fertilizers nitrogen fertilizers oryza sativa phosphate fertilizers potash fertilizers proximate composition rendement des cultures rendimiento de cultivos sulfate de cuivre sulfate de zinc sulfato de cinc sulfato de cobre superfosfato superphosphate urea uree yield components zinc zinc sulphate