Education

• Ph.D. Agronomy University of Illinois at Urbana Champaign 1994
• M.S. Agronomy University of Illinois at Urbana Champaign 1993
• B.S. Agronomy National University of Rosario, Argentina 1986

Research Interests

My work is concentrated on the evaluation of conventional and alternative management practices that improve the long-term performance of cropping systems. Most of my research is focussed on biometrics and the application of quantitative methods to the analysis of ecological, physiological, environmental, and management aspects of cropping systems.

Editorial Work

Associate Editor Agronomy Journal 2000-2005.
Associate Editor Crop Sciences 2004-present.

Selected publications

• Bollero, G.A. and D.G. Bullock, Cover Cropping Systems for the Central Corn Belt, Journal of Production Agriculture, Vol. 7, no. 1, 1994.
• Bollero, GA, D.G. Bullock, and S.E. Hollinger. Soil Temperature and Planting Date Effects on Yield, Leaf Area, and Plant Development. Agronomy Journal vol. 88, no. 3, May-June 1996.
• Walter, G, M. Wander, and GA Bollero. 1997, A Farmer-Centered Approach to Developing Information for Soil Resource Management: The Illinois Soil Quality Initiative. American Journal of Alternative Agriculture 12(2): 64-72.
• Wander M.M. and GA Bollero. 1998. Soil Quality Assessment in Illinois. In Press Soil Science Society of America Journal.
• Needelman B.A., M.M. Wander, GA Bollero, C.W. Boast, G.K. Sims, and D.G. Bullock, 1998. Interaction Between Tillage Practices And Soil Texture: Biologically-Active Soil Organic Matter In Illinois. In Press Soil Science Society of America Journal.

Teaching Responsibilities

CPSC 440 - Applied Statistical Methods

Membership In Professional Societies

• American Society of Agronomy
• Crop Science Society of America
• Soil Science Society of America

International Activities

Visiting lecturer, University of Los Andes, Santa Fe de Bogota, Columbia. I teach a graduate level class in Agroecology that is part of a Masters program in Environmental Management

Publications (last 5 years)

• Cooperband, L.R. G.A. Bollero, and F.J. Coale. 2002. Effect of poultry litter and composts on soil nitrogen and phosphorus availability and corn production. Nutrient Cycling in Agroecosystems 62: 185-194.
• Wander, M.M., G.L. Walter, T.M. Nissen, G.A. Bollero, S.S. Andrews, and D.C. Cavanaugh-Grant. 2002. Soil quality: Science and process. Agron. J. 94:23-32.
• Woolery, M.E., K.R. Olson, J. O. Dawson, and G. A. Bollero. 2002. Using soil properties to predict forest productivity in southern Illinois. J. Soil Water Conserv. 57:37-45.
• Ratcliffe S.T., H.M. Robertson, C.J. Jones, G.A. Bollero, and R.A. Weinzierl. 2002. Assessment of parasitism of house fly and stable fly pupae (Diptera: Muscidae) by pteromalid (Hymenoptera: Pteromalidae) parasitoids using polymerase chain reaction. J. Med. Entomol. 39: 52-60
• Kravchenko A.N., G.A. Bollero, R.A. Omonode, and D.G. Bullock. 2002. Quantitative mapping of soil drainage classes using topographical data and soil electrical conductivity. Soil. Sci. Soc. Amer. J. 60:235-243.
• McGuire N.C., R. Schulman, M.D. Ridgway, and G. A. Bollero. 2002. Detection of occult urinary tract infections in dogs with diabetes mellitus. J. Amer. Anim. Hospital Assoc. 38: 541-544.
• Hager A.G., L.M. Wax, E.W. Stoller, and G.A. Bollero. 2002. Common waterhemp (Amaranthus rudis) interference in soybean. Weed Sci. 5: 607-610.
• Hadley, C.I., K.R. Olson, G. A. Bollero, and G.E. Pepper. 2002. Predicting forage yields using properties of Illinois soils, USA. Pakistan J. Agron. 1:1-8.
• Hager A.G., L.M. Wax, G.A. Bollero, and F.W. Simmons. 2002. Common waterhemp (Amaranthus rudis Sauer) management with soil-applied herbicides in soybean (Glycine max (L) Merr.). Weed Sci. 5: 607-610.
• Taylor-Lovell, S., L.M. Wax, and G.A. Bollero. 2002. Preemergence flumioxazin and pendimethalin and postemergence herbicide systems for soybean (Glycine max) Weed Tech. 16: 502-511.
• Sudduth, K.A., N.R. Kitchen, G.A. Bollero, and D.G. Bullock. 2003. Comparison of electromagnetic induction and direct sensing of soil electrical conductivity. Agron. J. 95: 472-482..
• Ruffo, M.L., and G.A. Bollero. 2003. Modeling rye and hairy vetch residue decomposition as a function of degree-days and decomposition-days. Agron. J. 95: 900-907.
• Ruffo, M.L., and G.A. Bollero. 2003. Residue decomposition and C and N release rates prediction based on biochemical fractions using principal component regression. Agron. J. 95: 1034-1040.
• Hager A.G., L.M. Wax, E.W. Stoller, and G.A. Bollero. 2003. Influence of diphenylether herbicide application rate and timing on common waterhemp control in soybean. Weed Tech. 17:14-20.
• Steckel, L.E., C.L. Sprague, A.G. Hager, F.W. Simmons, and G.A. Bollero. 2003. Effects of shading on common waterhemp growth and development. Weed Sci. 51:898-903.
• Yeater, K.M., G.A. Bollero, D.G. Bullock, A.L. Rayburn, and S. Rodriguez-Zas. 2003. The use of canonical discriminant analysis for selection of hairy vetch. Crop Sci. 44:185-189.
• Ruffo, M. L., F. O. Garcia, G. A. Bollero, K. Fabrizzi, and R. A. Ruiz. 2003. Effects of nitrogen fertilizer on sunflower in South-East Buenos Aires, Argentina. Commun. Soil Sci. Plant Anal. 34:2645-2657.
• Young, B.G., J.M. Young, J.L. Matthews, M.D.K. Owen, I.A. Zelaya, R.G. Hartzler, L.M. Wax, K.W. Rorem, and G.A. Bollero. 2003. Soybean development and yield as affected by three postemergence herbicides. Agron. J. 95: 1152-1156.
• Yeater, K.M., G.A. Bollero, D.G. Bullock, A.L. Rayburn, and S. Rodriguez-Zas. 2004. The use of canonical discriminant analysis for selection of hairy vetch. Crop Sci. 44:185-189.
• Officer, S. J., A. N. Kravchenko, G. A. Bollero, K. A. Sudduth, N. R. Kitchen, W. J. Wiebold, H. L. Palm, and D. G. Bullock. 2004. Relationships between soil bulk electrical conductivity and the principal component analysis of topography and soil fertility values. Plant Soil. 258: 269-280.
• Yeater, K.M., G.A. Bollero, D.G. Bullock, and A.L. Rayburn. 2004. Flow cytometric analysis for ploidy level differentiation of 45 hairy vetch accessions. Anal. Appl. Biol. 145:123-127.
• Ruffo, M. L., D. G. Bullock, and G. A. Bollero. 2004. Soybean yield as affected by biomass and nitrogen uptake of cereal rye in winter cover crop rotations. Agron. J. 96:800-805.
• Crandall, S.M., M.L. Ruffo, and G.A. Bollero. 2005. Cropping system and nitrogen dynamics under a cereal winter cover crop preceding corn. Plant Soil 268:209-219.
• Martin, N. F., G.A. Bollero and D.G. Bullock. 2005. Associations between field characteristics and soybean plant performance using canonical correlation analysis. Plant Soil 273:39-55.
• Morgan, P.B., G.A. Bollero, R.L. Nelson, F.G. Dohleman and S.P. Long. 2005. Increase in above-ground net primary production and yield of soybean is less when [CO2] is elevated in the open. Global Change Biology 11:1-10.
• Adee, E.A., Paul, L. E., Nafziger, E. D., and Bollero, G. 2005. Yield loss of corn hybrids toincremental defoliation. Online. Crop Management doi:10.1094/CM-2005-0427-01-RS.
• K.A. Sudduth, N.R. Kitchen, W.J. Wiebold, W.D. Batchelor, G.A. Bollero, D.G. Bullock, D.E. Clay, H.L. Palm, F.J. Pierce, R.T. Schuler, K.D. Thelen. 2005. Relating apparent electrical conductivity to soil properties across the north-central USA Computers And Electronics In Agriculture 46: 263-283.
• Dann H. M., D. E. Morin, G.A. Bollero, M. R. Murphy, and J. K. Drackley. 2005. Prepartum intake, postpartum induction of ketosis, and periparturient disorders affect the metabolic status of dairy cows. Journal of Dairy Science 88: 3249-3264.
• Miguez, F.E. and G.A. Bollero. 2005. Review of corn yield response under winter cover cropping systems using meta-analytic methods. Crop Sci. 45:2318-2329.
• Ruffo, M.L., G. A. Bollero, D.G. Bullock, and R.G. Hoeft. 2005. Spatial Variability of the Illinois Soil Nitrogen Test: Implications for Soil Sampling. Agron. J. 97:1484-1492.
• Rayburn, A.L.,R. McCloskey, T. C. Tatum, G. A. Bollero, M. R. Jeschke, and P. J. Tranel. 2005. Genome Size Analysis of Weedy Amaranthus Species. Crop Sci. 45:2557-2562.
• Bierman, R.E., D.E. Riechers, C.L. Sprague, G. Bollero, and W.L. Pedersen. 2006. Fungicide-herbicide interaction in soybean (Glycine max). Crop Prot. 25: 134-139.
• Morgan P.B., T.A. Mies, G.A. Bollero, R.L. Nelson, and S.P. Long. 2006. Season-long elevation of ozone concentration to projected 2050 levels under fully open-air conditions substantially decreases the growth and production of soybean. New phytologist 170:333-343.
• Miguez, F.E. and G.A. Bollero. 2006. Winter cover crops in Illinois: evaluation of ecophysiological characteristics of corn. Crop Sci. 46: 1536-1545.
• Villamil, M.B., G.A. Bollero, R.G. Darmody, F.W. Simmons, and D.G. Bullock. 2006. No-till corn-soybean systems including winter cover crops: effects on soil properties. Soil. Sci Soc. Am. . J. 70:1936-1944.
• Ruffo, M.L., G.A. Bollero, D.S. Bullock, and D.G. Bullock. 2006. Site-specific production functions for variable rate corn nitrogen fertilization. J. Precision Agric. 7:327–342.
• Martín, N.F., G.A. Bollero, N.R. Kitchen, A.N. Kravchenko, K. Sudduth, W.J. Wiebold, and D.G. Bullock.  2006.  Two classification methods for developing and interpreting productivity zones using site properties.  Plant Soil 288: 357-371.
• Farias Neto, A.F. G.L. Hartman, W.L. Pedersen, S. Li, G. Bollero, and B.W. Diers.  2006.  Irrigation and inoculation treatments that increase the severity of soybean sudden death syndrome in the field.  Crop Sci. 46: 2547-2554.

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