425613.fig.001a
(a) Low STP soil
425613.fig.001b
(b) Medium STP soil
Figure 1: % P Recovery Ratio (%PRR) for the two sources of manure (low-STP soil) and the five combination of source of manure and application rate (medium-STP soil) at the five incubation periods. Within each soil, means sharing the same letter are not significantly different.