Fig. 3From: Plant–Rhizobium symbiosis, seed nutraceuticals, and waste quality for energy production of Vicia faba L. as affected by crop managementTheoretical ethanol yield from broad bean residual biomass at the different planting times in open field and greenhouse farming systems. Different letters mean significant difference according to Duncan multiple range test at p ≤ 0.05: lowercase refers to comparisons between planting times within each farming system, capital to comparison between farming systems within each planting timeBack to article page