[Field trials results of new maize hybrids included in the National register in 1999 [Zea mays L. - Italy]]

agronomic characters altezza altura caratteri agronomici conduite de la culture contenido de humedad crop losses crop management crop yield emilia romagna enregistrement ensayos de variedades field experimentation fitomejoramiento friuli venecia julia friuli venezia giulia gestione delle colture grain granella granos hauteur height hybride hybrids ibridi lombardia lombardie lombardy manejo del cultivo marcas (italia) marche marches (italie) marches (italy) miglioramento genetico vegetale moisture content perdite colturali peso piamonte piedmont piemont piemonte plant breeding poids prove varietali registration registrazione registro rendement des cultures rendimiento de cultivos teneur en eau toscana toscane tuscany variedades varieties variety trials veneto weight zea mays