The quality of grain and malt of continuously grown spring barley in relation to agroecological factors

amidon barley barley straw cebada cero-labranza contenido proteico cultivos de primavera culture de printemps fertilizantes nitrogenados grain granos monocultivo monoculture nitrogen fertilizers orge paille d'orge paja de cebada peso poids protein content spring crops starch weight zero tillage