highly significantP < 0.001
This difference in response between the two species was reflected in the P-application rate × species interaction being highly significant (two-way ANOVA, F 3, 24 = 9.34, P < 0.001), but the main effect of P application being non-significant (two-way ANOVA, F 3, 24 = 1.91, P = 0.154).