Response of some malting barley cultivars to differentiated nitrogen fertilization

analytical methods azote calidad caracteres de rendimiento cebada cervecera composante de rendement contenido proteico cultivos de primavera culture de printemps date de semis dosage dose fecha de siembra fertilisation fertilizer application field experimentation grain granos hordeum vulgare malting barley nitrogen orge de brasserie poland pologne polonia protein content quality rendement rendimiento sowing date spring crops statistical methods technique analytique variedades varieties yield components yields