[Plot level diagnostic of the state of a sunflower crop]

abonos nitrogenados aradura azote besoin nutritionnel biomasa biomass biomasse cantidad de semilla requerida caracteres de rendimiento composante de rendement conduite de la culture crop management crop yield decision making helianthus annuus labour leaf area manejo del cultivo necesidades de nutrientes nitrogen nitrogen fertilizers nutritional requirements oil crops plant condition plantas oleaginosas ploughing potentiel hydrique rendement des cultures rendimiento de cultivos sowing rates superficie foliar surface foliaire toma de decisiones water potential yield components