Effect of potassium on yield and composition of sunflower in two different textured soils [sandy clay loam and loamy clay texture]

abonos fosfatados abonos nitrogenados abonos potasicos altura caracteres de rendimiento composante de rendement composition globale contenido proteico crecimiento croissance crop yield engrais potassique feuille growth hauteur height helianthus annuus hojas leaves lipid content loam soils nitrogen fertilizers phosphate fertilizers potash fertilizers potassium sulphate protein content proximate composition rendement des cultures rendimiento de cultivos sandy soils sol sableux sol sablolimoneux suelo arenoso suelo franco sulfate de potassium sulfato de potasio superfosfato superphosphate teneur en lipides urea uree yield components