Response of soybean to nitrogen, phosphorus and potassium. 2.- Yield, yield components and seed chemical content

abonos fosfatados abonos nitrogenados abonos potasicos caracteres de rendimiento chemical composition composante de rendement composition chimique crop yield engrais potassique fertilisation fertilizer application glycine max graine nitrogen fertilizers phosphate fertilizers potash fertilizers rendement des cultures rendimiento de cultivos seeds semilla yield components