Soil Test Phosphorus Recovery from Livestock Manures Compared with Inorganic Fertilizer in Soil Incubations

Table 5

ANOVA P-values that show the main and interaction effects of Source of P (Source), Rate of application (Rate), and Incubation time (Day) as well as the linear and quadratic coefficients of the covariate on %PRR. Significant effects that require further multiple means comparison are shown in bold.

Source of variation	Low-STP soil	Medium-STP soil
Source	0.857	0.609
Rate	0.285	0.303
Source * Rate	0.134	0.934
Day	0.001	0.033
Source * Day	0.004	0.002
Rate * Day	0.544	0.002
Source * Rate * Day	0.389	0.009
pH	0.003	0.001
pH squared	0.004	0.001