Fig. 3From: Humic substances from green compost increase bioactivity and antibacterial properties of essential oils in Basil leavesAntioxidant activity measured using DPPH assay (panel a) and total phenolic content (panel b) of EOs from plant treatments. Vertical bars represent the standard deviation of the mean. Different capital letters indicate significant differences between groups according to LSD test (p ≤ 0.05)Back to article page