Effect of different biochar sources on ECe and pHs values of soil under maize cultivation. Mean value of three replicates has been presented with bars showing standard error. Tukey’s HSD was used for multiple comparisons under complete randomized design. NSC: non-saline control; SSC: saline-sodic control; OPB: orange peel biochar; WSB: wheat straw biochar; RHB: rice husk biochar; S: salinization.