Competition between sugar beet and its major weeds. 1. Shoot-, root- and full competition [biological competition, stems]

agentes nocivos anatomia anatomie anatomy biological competition biological properties crops cultivos economic plants facteur nuisible industrial crops injurious factors malezas mauvaise herbe plant anatomy plantas plantas azucareras plantas industriales plante plante de culture plante industrielle plante racine plants racine remolacha azucarera root crops roots stems storage organs sugar beet sugar crops tallo tige weeds