Figure 1. Impact of biochar amendment on saturated soil
hydraulic conductivity. The saturated hydraulic conductivity (K), as
measured using falling head experiments, for six soil treatments over
subsequent flushing events: (a) sand and sand+biochar, (b) organic and
organic+biochar, and (c) clay and clay+biochar. Note: the different soil
treatment flushing events varied in duration with the clay (c) taking up
to 106 longer to drain than the sand (a) or organic soil (b). Saturated
hydraulic conductivity data and flushing duration for each flushing
experiment available in Table S1.
doi:10.1371/journal.pone.0108340.g001