Response of spring barley to growing in monoculture in the potato growing region of the Bohemian-Moravian Uplands [Czechoslovakia, yields, organic fertilizers, nitrogen fertilizers]

abonos abonos verdes agricultural chemicals agronomic characters altiplanos amendement du sol barley cebada cereales cereals checoslovaquia cropping patterns crops cultivos cultivos de grano czechoslovakia economic plants engrais engrais organique engrais vert enmiendas del suelo europa europe fertilizantes nitrogenados fertilizers grain crops green manures mode de culture monocultivo monoculture nitrogen fertilizers orge physiographic features plantas plante plante de culture plants productividad productivity produit agrochimique profitability rendement rendimiento rentabilidad soil amendments yields