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Table 3 Two-way ANOVA results (P > F) of the effects of biochar feedstock sources, pyrolysis temperatures, and their interactions on soil P fractions

From: Effect of biochar addition on legacy phosphorus availability in long-term cultivated arid soil

Source of variation Resin-Pi NaHCO3-Pi NaHCO3-Po NaOH-Pi NaOH-Po HCl-Pi Residual-P
Biochar feedstock sources (BFS) *** *** *** *** *** * **
Pyrolysis temperature (PT) NS NS *** *** *** * **
BFS × PT NS *** *** *** *** * **
  1. NS not significant
  2. ***P < 0.001
  3. **P < 0.01
  4. *P < 0.05