Fig. 5From: Effects of acidic phosphorus-rich biochar from halophyte species on P availability and fractions in alkaline soilsInfluence of halophyte biochar (HBC), H3PO4-modified biochar (P-HBC), and H4P2O7-modified biochar (PA-HBC) on pH (a–d), electrical conductivity (EC) (e–h) and total P (i–l) in the soils. Control: untreated soil (CK); AS: aeolian sandy soils; BS: brown desert soils; GS: grey desert soils; SS: saline soils. Error bars are standard deviation of the means (n = 4). Different letters above the bars indicate significant (p < 0.05) difference between treatmentsBack to article page