[Survey on field experiments 2001, E: Seed crops and industrial crops]

brassica napus cultivos de invierno cultivos de primavera cultivos de semillas culture d'hiver culture de printemps danemark denmark dinamarca escarda field experimentation gramineas graminee grasses industrial crops malezas mauvaise herbe pests of plants plagas de plantas plant protection plantas industriales plante industrielle porte graines protection des plantes ravageur des plantes seed crops spinacia oleracea spring crops variedades varieties weed control weeds winter crops