The introduction of oilseed rape hybrids in the United Kingdom | L'introduction des hybrides de colza au Royaume-Uni

brassica napus cantidad de semilla requerida crop yield cultivos de invierno cultivos de primavera culture d'hiver culture de printemps cytoplasmic male sterility hybride hybrids oil crops plantas oleaginosas pollination pollinisation rendement des cultures rendimiento de cultivos royaume-uni sowing rates spring crops variedades varieties winter crops