Knutson, M. G., Richardson, W. B., Reineke, D. M., Gray, B. R., Parmelee, J. R., and Weick, S. E., 2004, Agricultural ponds support amphibian populations: Ecological Applications, v. 14, no. 3, p. 669-684. Abstract Keywords Habitat management, Landscape, Livestock grazing, Nitrogen, Stock pond, Water quality