[Survey of field experiments, F: Seed and industrial crops]

azote brassica napus cultivos de invierno cultivos de primavera culture d'hiver culture de printemps danemark denmark dinamarca espinaca fertilisation fertilizer application flax gramineas graminee grasses lin lino linum usitatissimum nitrogen plant protection protection des plantes seed semence semillas spinach spinacia oleracea spring crops variedades varieties winter crops