Wortmann, C.S., and C.A. Shapiro. 2008. Effects of manure application on soil aggregation. Nutr. Cycl. Agroecosyst. 80:173-180. [view and download PDF of full paper]

Mamo, M., C. Wortmann, and S. Brubaker. 2007. Manure P Fractions: Analytical methods and effect of manure types. Comm. Soil and Plant Anal. 38:935-947. [view full article]

Wortmann, C.S. and D.T. Walters. 2007. Residual effects of compost and plowing on phosphorus and sediment in runoff. J. Envir. Qual. 36:1521-1527. [view and download PDF of full paper]

Wortmann, C.S. and D.T. Walters. 2006. Phosphorus runoff during four years following composted manure application. J. Envir. Qual. 35:651-657. [view and download PDF of full paper]

Wortmann, C.S., R.K. Koelsch, C.A. Shapiro, R.L. DeLoughery, D. Tarkalson, 2005. Manure use planning: an evaluation of a producer training program. J. Extension Vol 43 (4) Article N0. 4RIB5 [view full article]

Shapiro, C.A., W.L. Kranz, and C.S. Wortmann. 2004. Salt thresholds for liquid manure applied to corn and soybean. Trans. ASAE. 48:1005-1013. [view and download PDF of full paper]

Kranz, W.L., C.A. Shapiro, B.E. Anderson, M.C. Brumm, and M. Mamo. 2005. Effects of swine lagoon water application rate and alfalfa harvest frequency on dry matter production and N harvest. Appl. Eng. Ag. 21:203-210. [view and download PDF of full paper]

Binder, D.L., A. Dobermann, D.H. Sander, and K.G. Cassman. 2002. Biosolids as nitrogen source for irrigated maize and dryland sorghum. Soil Sci. Soc. Am. J. 66:531-543. [view and download PDF of full paper]

Binder, D.L., A. Dobermann, D.H. Sander, and K.G. Cassman. 2001. Potential benefits of land-applying biosolids in eastern Nebraska.  In Biosolids 2001: Building public support. WEF, San Diego (CD Rom). [view full paper]

Binder, D.L., A. Dobermann, D.H. Sander, K.G. Cassman, K.D. Frank, and W.L. Shires. 2000. Agronomic, economical, and environmental impact of land applying biosolids. Terminal report 1996-1999. University of Nebraska-Lincoln, Lincoln, NE. [view and download PDF of full paper]

Tarkalson, D.D., and R.L. Mikkelsen. 2004. Runoff phosphorus losses as related to phosphorus source, application method, and application rate on a Piedmont soil. J. Environ. Qual. 33:1424-1430. [view and download PDF of full paper]