Fig. 2From: Effects of acidic phosphorus-rich biochar from halophyte species on P availability and fractions in alkaline soilsScanning electron microscopy energy dispersive spectroscopy (SEM–EDS) imaging of the halophyte biochar (HBC), H3PO4-modified biochar (P-HBC), and H4P2O7-modified biochar (PA-HBC)Back to article page