Influence of manganese sulphate foliar application on yield and manganese concentration in winter wheat and spring barley grains

abonos sulfurados application foliaire application rates contenido mineral crop yield cultivos de invierno cultivos de primavera culture d'hiver culture de printemps dose d'application fertilisation fertilizer application foliar application grain granos hordeum vulgare manganese manganese sulphate manganeso mineral content rendement des cultures rendimiento de cultivos spring crops sulfato de magnesio sulphur fertilizers triticum aestivum winter crops