Fig. 4

(a) Root fresh and (b) dry weight values of winter wheat seedlings (cv. Isengrain) of different treatments 14 days after seeding. Every data point show average treatment values of four independent replicates. Error bars indicating standard error. Different letters above the bars indicating significant differences (α = 0.05). Cont = pure soil without glyphosate, Gly = glyphosate 6L dose without biochar amendment, ch5% = biochar amendment of 5%, Gly6L+ch1% = glyphosate with biochar amendment of 1%, Gly6L+ch2.5% = glyphosate with biochar amendment of 2.5%, Gly6L+ch5% = glyphosate with biochar amendment of 5%, gly6L+ch10% = glyphosate with biochar amendment of 10%