Fig. 5. Relationship between runoff dissolved P (µg L^–1) as predicted from water-extractable soil P and the equation in Fig. 4a or from Mehlich-3 soil P and the equation in Fig. 3. Soil P data are from Andraski and Bundy (2003), Andraski et al. (2003), Daverede et al. (2003), Pote et al. (1999b)(Noark soil omitted), Schroeder et al. (2004), and Torbert et al. (2002).