Fig. 6. Relationship between dissolved inorganic P concentrations in runoff from field plots where manures had been surface-applied and subjected to simulated rain as measured by Kleinman et al. (2001) and as predicted by Eq. [3] and [4], using (a) P distribution fractions predicted from runoff to rain ratios with the relationship in Fig. 5a, or (b) measured runoff to rainfall ratios adjusted based on the relationship in Fig. 5b. The symbol *** designates significance at the 0.001 probability level.