Table 4: Estimated solution concentrations (16-week average) of organic acid mixtures in root exudates of corn.

TreatmentEstimated concentration (mM)
Standard (control) Biosolid-treated
MeanSDMeanSD

Blank2.050.633.410.87
Planted5.231.2112.92.04

All experiments performed in four replicates for each 2, 4, 8, 12, and 16 weeks. Values represent means and standard deviation of 20 replicates.