SP report, 5: Varieties of leek: autumn leek, conventional growing; early leek and autumn leek, organic growing; leek for processing, conventional growing

abonos agricultura tradicional agriculture biologique agriculture traditionnelle allium ampeloprasum almacenamiento calidad crop yield danemark date de semis denmark dinamarca disease resistance engrais fecha de siembra fertilizers leeks organic farming poireau puccinia puerro quality rendement des cultures rendimiento de cultivos resistencia a la enfermedad sowing date stockage storage traditional farming trial methods variedades varieties