[Trials with Scotch and Norwegian cultivars and selections in black currants (Ribes nigrum L.)]

black currants breeding value calidad cassis contenido de materia seca crecimiento croissance crop yield dry matter content ensayos de variedades escocia fruit crops fruit growing frutales fruticultura grosella negra growth noruega norway precipitation quality rendement des cultures rendimiento de cultivos ribes nigrum scotland selection site factors temperatura temperature variedades varieties variety trials