[Evaluation of sunflower varieties grown in Italy during 1998 [Helianthus annuus L. - Marches - Umbria - Tuscany]]

agronomic characters altezza altura calidad caratteri agronomici conduite de la culture contenuto lipidico crop management crop yield ensayos de variedades environmental factors evaluation facteur du milieu factores ambientales fattori ambientali field experimentation fitomejoramiento gestione delle colture graine hauteur height helianthus annuus lipid content manejo del cultivo marcas (italia) marche marches (italie) marches (italy) miglioramento genetico vegetale ombrie plant breeding precocidad precocity prove varietali quality rendement des cultures rendimiento de cultivos seeds semi semilla teneur en lipides toscana toscane tuscany umbria umbria (italy) valutazione variedades varieties variety trials