Fig. 4. Effect of glyphosate addition dose on soil carbon mineralization. Carbon mineralized from basal microbial respiration in control samples has been subtracted. The 1, 2, 3, and 5X represent glyphosate addition doses of 47, 94, 140, and 234 mg ai kg^–1 soil, respectively. Error bars indicate ± 1 standard deviation (Haney et al., 2000).