Donald Ludwig, Steve Carpenter, and W. Brock. 2003. Optimal phosphorus loading for a potentially eutrophic lake. Ecological Applications 13:1135–1152.

Appendix E. A figure showing optimal P loadings as a function of P and M for discount rate = 0.05.

   FIG. E1. Optimal P loadings as a function of P (P concentration in lake, in kilograms per square meter) and M (P concentration in mud, in kilograms per square meter) for discount rate = 0.05. The key shows the values corresponding to the colors. The values of _i used are shown in the labels above each plot.