[Diagnostic methods to assess the nutritional condition of sorghum [Sorghum bicolor (L.) Moench - Emilia-Romagna]]

abonos nitrogenados analytical methods application rates azote azoto besoin nutritionnel chlorophylle chlorophylls clorofilas clorofille concimi azotati conduite de la culture crop management crop yield dose d'application dosi di applicazione emilia romagna environmental factors estado nutricional facteur du milieu factores ambientales fattori ambientali fertilisation fertilizer application feuille foglie fusti gestione delle colture hojas leaves manejo del cultivo metodi analitici necesidades de nutrientes nitrate nitrates nitrati nitratos nitrogen nitrogen content nitrogen fertilizers nutritional requirements nutritional status plant response rendement des cultures rendimiento de cultivos respuesta de la planta risposta della pianta sorghum bicolor stato nutrizionale stems tallo technique analytique teneur en azote tige