Effects of nitrogen fertilization on yield, fruit quality and vegetative properties of red currant cultivar 'Rovada'

acide ascorbique acido ascorbico analyse de sol ascorbic acid azote blattanalyse calidad chlorophylle chlorophylls clorofilas composition globale crecimiento croissance fertilisation fertilizer application groseille rouge grosella roja growth nitrate nitrates nitratos nitrogen proximate composition quality red currants rendement rendimiento ribes soil testing yields