Fig. 5From: Plant–Rhizobium symbiosis, seed nutraceuticals, and waste quality for energy production of Vicia faba L. as affected by crop managementNitrogen uptake per root nodule at the different phenological phases and planting times; V, vegetative phase; Fl, early flowering; Efr, early fruiting; Mfr, mid-fruiting; Lfr, late fruiting. Different letters mean significant difference according to Duncan multiple range test at p ≤ 0.05: lowercase refers to comparison between phenological phases within each planting time, capital to comparison between planting times within each phaseBack to article page