Book

  • Roberts, C.A., C.P. West, and D.A. Spiers (eds.) 2005. Neotyphodium in Cool-Season Grasses. 392 p. Blackwell Publishing Professional, Ames, IA. Wiley listing
  • Roberts, C.A., J.W. Workman, and J.B. Reeves (eds.) 2004. Near-Infrared Spectroscopy in Agriculture. 822 p. ASA Monogr. 44, ASA, Madison, WI. Front matter (PDF)
  • Brummer, E.C., N.S. Hill, and C.A. Roberts (eds.) 1998. Molecular and Cellular Technologies for Forage Improvement. 134 p. Crop Sci. Soc. Am. Spec. Pub. 26. B&N listing

Journal

  • Kenyon, S.L., C.A. Roberts, R.L. Kallenbach, J.A. Lory, M.S. Kerley, and G.E. Rottinghaus. 2018. Ergovaline concentration of tall fescue as affected by limestone application. Crop Forage Turfg. Manage. (in press).
  • Kenyon, S.L., C.A. Roberts, R.L. Kallenbach, J.A. Lory, M.S. Kerley, and G.E. Rottinghaus, N.S. Hill, and M.R. Ellersieck. 2018. Vertical distribution of ergot alkaloids in the vegetative canopy of tall fescue. Crop Sci. 58:925-31. doi: 10.2135/cropsci2017.03.0202.
  • Willett., C.D., R.N. Lerch, K.W. Goyne, N.D. Leigh, C. Lin, and C.A. Roberts. 2016. Benzoxazinone-mediated triazine degradation: A proposed reaction mechanism. J Agric. Food Chem. 64:4858–4865. DOI: 10.1021/acs.jafc.6b01017
  • Richner, J.M., R.L. Kallenbach, and C.A. Roberts. 2014. Dual use switchgrass: Managing switchgrass for biomass production and summer forage. Agron. J. 106:1438-1444.
  • Willett., C.D., R.N. Lerch, K.W. Goyne, N.D. Leigh, C. Lin, and C.A. Roberts. 2014. A simple method for isolation and purification of DIBOA-Glc from Tripsacum dactyloides. Nat. Prod. Comm. 9:1-4.
  • Roberts, C.A., D.K. Davis, M.L. Looper, R.L. Kallenbach, G.E. Rottinghaus, and N.S. Hill. 2014. Ergovaline and total ergot alkaloid concentrations in high- and low-moisture tall fescue silage. Crop Sci. 54:1887-1892.
  • Houx, J.H., III., C.A. Roberts, and F.B. Fritschi. 2013. Evaluation of sweet sorghum bagasse as an alternative livestock feed. Crop Sci. 53:1784-1790.
  • Safiullah M. P., T. Vuong, K. Clark, J. Lee, G. Shannon, C. Roberts, M. Ellersieck, J. Burton, P.B. Cregan, D.L. Hyten, H.T. Nguyen and D.A. Sleper. 2013. Genetic mapping and confirmation of quantitative trait loci for seed protein and oil contents and seed weight in soybean. Crop Sci. 53:765-774.
  • Willett, C., Lerch, R., Lin, C., Goyne, K., Leigh, N., and Roberts, C. 2013. Identification of an atrazine-degrading benzoxazinoid in eastern gamagrass (Tripsacum dactyloides). J. Agric. Food Chem. 61:8026-8033.
  • Hamilton, S.A., R.L. Kallenbach, G.J. Bishop-Hurley and C.A. Roberts. 2013. Stubble height management changes the productivity of perennial ryegrass and tall fescue pastures. Agron. J. 105:557-562.
  • Sather, B.C., C.A. Roberts, and K.W. Bradley. 2013. Influence of metsulfuron-containing herbicides and application timings on tall fescue seedhead production and forage yield. Weed Tech 27:34-40.
  • Roberts, C.A., J.H. Houx III, and F.B. Fritschi. 2011. Near-infrared analysis of sweet sorghum bagasse. Crop Sci. 51:2284-2288.
  • Roberts, C.A., R.L. Kallenbach, G.E. Rottinghaus, and N.S. Hill. 2011. Ergovaline and ergot alkaloid concentrations change in conserved tall fescue forage. Online. Forage and Grazingl. doi:10.1094/FG-2011-1013-01-RS.
  • Rogers, W.M., C.A. Roberts, J.G. Andrae, D.K. Davis, G.E. Rottinghaus, N.S. Hill, R.L. Kallenbach, and D.E. Spiers. 2011. Seasonal fluctuation of ergovaline and total ergot alkaloid concentrations in tall fescue regrowth. Crop Sci. 51:1-6.
  • Rosembaum, K.K., K.D. Bradley, and C.A. Roberts. 2011. Influence of increasing common ragweed (Ambrosia artemisiifolia L.) and common cocklebur (Xanthium strumarium L.) densities on forage nutritive value and yield in tall fescue pastures and hayfields. Weed Tech. 25:222-229. 2011.
  • Rogers, W.M., C.A. Roberts, R.L. Kallenbach, G.E. Rottinghaus, N.S. Hill, W.E. McClain, and D.G. Blevins. 2010. Poultry litter and its chemical equivalent can affect ergot alkaloid concentrations in tall fescue. Forage and Grazingl. Online. doi:10.1094/FG-2010-1203-01-RS.
  • Bradley, K.D., R.L. Kallenbach, C.A. Roberts. 2010. Influence of seeding rate and herbicide treatements on weed control, yield, and quality of spring-seeded glyphosate-resistant alfalfa. Agron. J. 102:751-758.
  • Looper, M.L, R.W. Rorie, C.N. Person, T.D. Lester, D.M. Hallford, G.E. Aiken, C.A. Roberts, G.E. Rottinghaus, and C.F. Rosenkrans, Jr. 2009. Influence of toxic endophyte-infected fescue on sperm characteristics and endocrine factors of yearling Brahman-influenced bulls. J. Anim. Sci. 87:1184-1191.
  • Dierking, R.M., R.L. Kallenbach, and C.A. Roberts. 2009. Fatty acid profiles of orchardgrass, tall fescue, perennial ryegrass, and alfalfa. Crop Sci. 50:1496-1502.
  • Roberts, C.A., R.L. Kallenbach, N.S Hill, G.E. Rottinghaus, and T. J. Evans. 2009. Ergot alkaloid concentrations in tall fescue hay during production and storage. Crop Sci. 49:1496-1502.
  • Curtis, L.E., R.L. Kallenbach, and C.A. Roberts. 2008. Allocating forage to fall-calving cow-calf pairs strip-grazing stockpiled tall fescue. J. Anim. Sci. 86:780-789.
  • Dierking, R.M., R.L. Kallenbach, M.S. Kerley, C.A. Roberts, and T.R. Lock. 2008. Yield and nutritive value of ‘Spring Green’ festulolium and ‘Jessup’ endophyte-free tall fescue stockpiled for winter pasture. Crop Sci. 48:2463-2469.
  • Ren, C., K.D. Bilyeu, C.A. Roberts, and P.R. Beuselinck. 2007. Factors regulating the mobilization of storage reserves in soybean cotyledons during post-germinative growth. Seed Sci. Tech. 35:303-317.
  • Shewmaker, G.E., H.F. Mayland, C.A. Roberts, P.A. Harrison, N.J. Chatterton, and D.A. Sleper 2006. Carbohydrate accumulations in eight tall fescue cultivars. Grass and Forage Sci. 61:413-421.
  • Roberts, C.A., C. Ren, P.R. Beuselinck, H.R. Benedict, and K. Bilyeu. 2006. Fatty acid profiling of soybean cotyledons by near-infrared spectroscopy. Appl. Spectrosc. 60:1328-1333.
  • Kallenbach, R.L., C.A. Roberts, T.R. Lock, T.R., D.H. Keisler, M.R. Ellersieck, and G.E. Rottinghaus. 2006. Performance of steers fed ammoniated straw from tall fescue seed fields. Online. Forage and Grazinglands doi:10.1094/FG-2006-0113-01-RS.
  • Roberts, C.A., H.R. Benedict, N.S Hill, R.L. Kallenbach, and G.E. Rottinghaus. 2005. Determination of ergot alkaloid content in tall fescue by near-infrared spectroscopy. Crop Sci. 45:778-783.
  • Wen, L., J.E. Williams, R.L. Kallenbach, C.A. Roberts, P.R. Beuselinck, and R.L. McGraw. 2004. Cattle preferentially select birdsfoot trefoil from mixtures of tall fescue and birdsfoot trefoil. Online. Forage and Grazinglands doi:10.1094/FG-2004-0924-01-RS.
  • McGraw, R.L., F.W. Shockley, J.F. Thompson, and C.A. Roberts. 2004. Evaluation of fifteen native legume species for forage yield, quality, and seed production. Native Plants J. 4:152-159.
  • Roberts, C.A., and J.A. Andrae. 2004. Tall fescue toxicosis and management. Online. Crop Managm. doi. 10:1094/CM-2004-0427-01-MG.
  • Nihsen, M., E.L. Piper, C.P. West, R.J. Crawford, T.M. Denard, Z.B. Johnson, C.A. Roberts, D.A. Spiers, and C.F. Rosenkrans. 2004. Growth rate and physiology of steers grazing tall fescue inoculated with novel endophytes. J. Anim. Sci. 82:878-883.
  • Kallenbach, R.L., G.J. Bishop-Hurley, M.D. Massie, and C.A. Roberts. 2003. Stockpiled annual ryegrass for winter forage in the lower Midwestern USA. Crop Sci. 43:1414-1419.
  • Wen, L., C.A. Roberts, J.E. Williams, R.L. Kallenbach, P.R. Beuselinck, and R.L. McGraw. 2003. Condensed tannin concentration of rhizomatous and non-rhizomatous birdsfoot trefoil in grazed mixtures and monocultures. Crop Sci. 43:302-306.
  • Roberts, C.A., R.L. Kallenbach, and N.S. Hill. 2002. Harvest and storage methods affect ergot alkaloid concentration in tall fescue. Online. Crop Managm. doi. 10:1094/CM-2002-0917-01-BR.
  • Wen, L., R.L. Kallenbach, J.E. Williams, C.A. Roberts, P.R. Beuselinck, R.L. McGraw, and H.R. Benedict. 2002. Performance of steers grazing rhizomatous and non-rhizomatous birdsfoot trefoil in pure stands and in tall fescue mixtures. J. Anim. Sci. 80:1970-1976.
  • Gebrehiwot, L., P.R. Beuselinck, and C.A. Roberts. 2002. Seasonal variations in condensed tannin concentration of three Lotus species. Agron. J. 94:1059-1065.
  • Roberts, C.A., D.E. Spiers, A.L. Karr, H.R. Benedict, D.A. Sleper, P.A. Eichen, C.P. West, E.L. Piper, and G.E. Rottinghaus. 2002. Use of a rat model to evaluate tall fescue seed infected with introduced strains of Neotyphodium coenophialum. J. Agric. Food Chem. 50:5742-5745.
  • Steiner, J.J., P.R. Beuselinck, S.L. Greene, J.A. Kamm, J.H. Kirkbride, and C.A. Roberts. 2001. A description and interpretation of the NPGS birdsfoot trefoil core subset collection. Crop Sci. 41:1968-1980.
  • Gray, D.E., C.A. Roberts, G.E. Rottinghaus, H.E. Garrett, and S.G. Pallardy. 2001. Quantification of chicoric acid in purple coneflower by near infrared reflectance spectroscopy. Crop Sci. 41:1159-1161.
  • Kallenbach,R.L., C.A. Roberts, L.R. Teuber, G.J. Bishop-Hurley, and H.R. Benedict. 2001. Estimation of fall dormancy in alfalfa by near infrared reflectance spectroscopy. Crop Sci. 41:774-777.
  • Kallenbach, R.L., R.L. McGraw, P.R. Beuselinck, and C.A. Roberts. 2001. Summer and autumn growth of rhizomatous birdsfoot trefoil. Crop Sci. 41:149-156.
  • Marek, S.M., C.A. Roberts, A.L. Karr, and D.A. Sleper. 2000. Chitinase activity in tall fescue as affected by ethephon and cultivar. Crop Sci.40:713-716.
  • Roberts, C.A., R.E. Joost, and G.E. Rottinghaus. 1997. Quantification of ergovaline in tall fescue by near infrared reflectance spectroscopy. Crop Sci. 37:281-284.
  • Marek, S.M., C.A. Roberts, and A.L. Karr. 1995. Silver stain detection of chitinolytic isozymes after polyacrylamide gel electrophoresis. Anal. Biochem. 230:184-185.
  • Davis, D.K., R.L. McGraw, P.R. Beuselinck, and C.A. Roberts. 1995. Total nonstructural carbohydrate accumulation in roots of annual lespedeza. Agron. J. 87:89-92.
  • Bewig, K.M., A.D. Clarke, C.A. Roberts, and N. Unklesbay. 1994. Discriminant analysis of vegetable oils using near infrared reflectance spectroscopy. J. Am. Oil Chem. 71:195-200.
  • Roberts, C.A., S.M. Marek, W. Lei, and A.L. Karr. 1994. Quantification of chitinase activity by near infrared reflectance spectroscopy. Crop Sci. 34:1070-1073.
  • Gerrish, J.R., P.R. Peterson, C.A. Roberts, and J.R. Brown. 1994. Nitrogen fertilization of stockpiled tall fescue in the Midwestern U.S. J. Prod. Agric. 7:98-104.
  • Pavetti, D.P., D.A. Sleper, and C.A. Roberts. 1994. Genetic variation and relationship of quality traits between herbage and seed of tall fescue. Crop Sci. 34:427-431.
  • Roberts, C.A., P.R. Beuselinck, M.R. Ellersieck, D.K. Davis, and R.L. McGraw. 1993. Condensed tannins in diverse accessions of Lotus corniculatus. Crop Sci. 32:675-679.
  • Bughara, S.S., D.A. Sleper, and C.A. Roberts. 1992. Effect of prepared cellulase solution concentrations on development of NIRS equations for predicting digestibility in tall fescue. Agron. J. 84:636-638.
  • Roberts, C.A., S.M. Marek, T.L. Niblack, and A.L. Karr. 1992. Parasitic Meloidogyne and mutualistic Acremonium elicit chitinase in tall fescue. J. Chem. Ecol. 18:1107-1116.
  • Beuselinck, P.R., D.A. Sleper, S.S. Bughara, and C.A. Roberts. 1992. Effect of mono and mixed culture of tall fescue and birdsfoot trefoil. Agron. J. 84:133-137.
  • Roberts, C.A., R.R. Marquardt, A.A. Frohlich, R.L. McGraw, R.G. Rotter, and J.C. Henning. 1991. Chemical and spectral quantification of mold in barley. Cereal Chem. 68:272-275.
  • Roberts, C.A., and K.J. Moore. 1990. Chemical regulation of tall fescue physiological development and nutritive value with amidochlor. Agron. J. 82:523-525.
  • Moore, K.J., C.A. Roberts, and J.O. Fritz. 1990. Indirect estimation of the botanical composition of alfalfa-smooth bromegrass mixtures at three stages of maturity. Agron. J. 82:287-290.
  • Roberts, C.A., K.J. Moore, and K.D. Johnson. 1989. Forage quality and yield of wheat-vetch at different stages of maturity and vetch seeding rates. Agron. J. 81:57-60.
  • Roberts, C.A., F.E. Barton, II, and K.J. Moore. 1988. Estimation of Acremonium coenophialum mycelium in tall fescue tissue. Agron. J. 80:737-740.
  • Roberts, C.A., P.L. Houghton, K.J. Moore, K.A. MacMillan, and R.P. Lemenager. 1987. Analysis of bovine udder, plate, and viscera using near infrared reflectance spectroscopy. J. Anim. Sci. 65:278-281.
  • Roberts, C.A., K.J. Moore, D.W. Graffis, H.W. Kirby, and R.P. Walgenbach. 1987. Quantification of mold in hay using near infrared reflectance spectroscopy. J. Dairy Sci. 70:2560-2564.
  • Roberts, C.A., K.J. Moore, D.W. Graffis, H.W. Kirby, and R.P. Walgenbach. 1987. Chitin as an estimate of mold in hay. Crop Sci. 27:783-785.

Chapter

  • Roberts, C.A., G. Lacefield, D. Ball, and G. Bates. 2009. Managing tall fescue to optimize grazing in the northern hemisphere. p. 85-99. In H. Fribourg et al. (eds.) Tall fescue for the 21st century. ASA, Madison, WI. (in press)
  • Bush, L.P., C.A. Roberts, and C. Schultz. 2007. Plant chemistry and antiquality compoents in forage. p. 509-529. In RF Barnes, et al. (eds.) Forages: the Science of Grassland Agriculture. 6th ed. Iowa State Press, Ames, IA.
  • Roberts, C.A., and J.A. Andrae. 2005. Public education in tall fescue toxicosis. p. 359-377. In C.A. Roberts, et al. (eds.) Neotyphodium in Cool-Season Grasses. Blackwell Publishing Professional, Ames, IA.
  • Roberts, C.A., J.S. Stuth, and P.C. Flinn. 2004. Near-infrared applications in forages and feedstuffs. p. 231-267. In C.A. Roberts et al. (eds.) Near-Infrared Spectroscopy in Agriculture. ASA Monogr. 44, ASA, Madison, WI.
  • Roberts, C.A. 1995. Microbiology of stored forages. p. 21-38. In K.J. Moore and M.A. Peterson (eds.) Post-harvest Physiology and Preservation of Forages. Crop Sci. Soc. Am. Spec. Pub. No. 22, Madison, WI.