Fig. 4. Total (P_t), organic (P_o), and inorganic phosphorus (P_i) (mg P kg^-1) in stained and unstained areas of Lismore soil. For the letter pair a and b, the difference between stained and unstained areas is statistically significant at the 0.05 probability level, based on paired t tests. For the letter pair a and a, the difference between stained and unstained areas is not statistically significant at the 0.05 probability level, based on paired t tests.