04/10/2002

Acosta-Martinez, V., and M.A. Tabatabai. 2000. Arylamidase activity of soils. Soil Sci. Soc. Am. J. 64:215-221.



Acosta-Martinez, V., and M.A. Tabatabai. 2000. Enzyme activities in limed agricultural soil. Bio. Fertil. Soils 31:85-91.



Acosta-Martinez, V., and M.A. Tabatabai. 2000. Arylamidase activity of soils: effect of trace elements and relationships to soil properties and activities of amidohydrolases. Soil Biol. Biochem. (In Press).



Andraski, T.W., L.G. Bundy, and K.R. Brye. 2000. Crop management and corn nitrogen rate effects on nitrate leaching. J. Environ. Qual. 29:1095-1103.



Binder, D.L., D.H. Sander, and D.T. Walters. 2000. Irrigated maize response to time of nitrogen application as affected by level of nitrogen deficiency. Agron. J. 92(6) 1228-1236.



Brouder, S.M., and B. Hofmann. 2000. Environmentally friendly management of nitrogen in continuous and rotational corn in the eastern cornbelt. 2000. In Proceedings of the Symposium of the Japan Science-Promoting Society, Faculty of Agriculture, Iwate University, Morioka, Japan, Sept. 2nd , 1999. Pp. 85-93.



Brouder, S.M., D.B. Mengel, and B.S. Hofmann. 2000. Diagnostic efficiency of the blacklayer stalk nitrate and grain N tests for Corn. Agron. J. 92:1236-1247.



Bundy, L.G. 2000. Nitrogen recommendations and optimum nitrogen rates: How do they compare? In Proc. 30th North Central Extension?Industry Soil Fert. Workshop, St. Louis, MO, 15-16 Nov., 2000. 16:5-13.



Deng, S.P., and M.A. Tabatabai. 2000. Effect of cropping systems on nitrogen mineralization in soils. Biol. Fertil. Soils 31: 211-218.



Deng, S.P., and M.A. Tabatabai. 2000. Characterization of active N pools in soils under different cropping systems. Biol. Fertil. Soils 32: 302-309.



Eagle, A.J., J.A. Bird, W.R. Horwath, B.A. Linquist, S.M. Brouder, J.A. Hill, and C. van Kessel. 2000. Rice yield and nitrogen utilization efficiency under alternative straw management practices. Agron. J. 92:1096-1103.



Gilmour, J., Cogger, C., Jacobs, L.W., Wilson, S.A., Evanylo, G.K., Sullivan, D.M. 2000. Estimating plant-available nitrogen in biosolids. Project 97-REM-3, Water Environment Research Foundation, Alexandria, VA. 46 p.



Klose, S., and M.A. Tabatabai. 2000. Urease activity of microbial biomass in soils as affected by cropping systems. Biol. Fertil. Soils 31: 191-199.



Klose, S., and M.A. Tabatabai. 2000. Soil microbial biomass carbon and nitrogen as affected by cropping systems. Biol. Fertil. Soils 31: 200-210.



Poudel, D.D., W.R. Horwath, J. P. Mitchell, S.R. Temple. 2001. I Impacts of Cropping Systems on Soil Nitrogen Storage and Loss. Agricultural. Ecosystems. Environment Journal. Accepted.



Poudel, D.D., W.R. Horwath, S.R. Temple, W.T. Lanini, and A.H.C. van Bruggen. 2001. Potential of plant tissue nitrogen as an indicator of crop yield and soil nitrogen availability in farming systems. Agricultural. Ecosystems. Environment Journal. Accepted.



Randall,G. W., T. K. Iragavarapu, and M. A. Schmitt. 2000. Nutrient losses in subsurface drainage water from dairy manure and urea applied for corn. J. Environ. Qual. 29:1244-1252.



Ryan, K.E., E.J. Kladivco, M.V. Hickman, S.M. Brouder, C. Nakatsu, J.G. Graveel, and J. Santini. 2000. Soil quality improvement with cover crop mixtures. In Proceedings of the International Soil Tillage Research Organization (ISTRO) 2000 Conference, July 2-7, 2000, Fort Worth, Texas.



Schmidt, J. P., M. A. Schmitt, G. W. Randall, J. A. Lamb, J. H. Orf, and H. T. Gollany. 2000. Swine manure application to nodulating and nonnodulating soybean. Agron. J. 92:987-992.



Yamoah, C.F., D.T. Walters, C.A. Shapiro, C.A. Francis and M..J.. Hayes. 2000. Standardized precipitation index and nitrogen effects on yields and risk distribution of maize. Agr. Ecostys. Environ. 80:113-120.

06/07/2002

Acosta-Martinez, V. and M.A. Tabatabai. 2001. Arylamidase activity of soils: Effect of trace elements and relationships to soils properties and activities of amidohydrolases. Soil Biology and Biochemistry 33:17-23.



Artikov, I., D.T. Walters and G. Teichmeier. 2001. Relationship of maize diagnostic leaf N to whole plant specific leaf N. ASA/SSSA meeting, 21-25 October, Charlotte, NC.



Brye, K.R., J.M. Norman, L.G. Bundy, and S.T. Gower. 2001. Nitrogen and carbon leaching in agroecosystems and their role in denitrification potential. J. Environ. Qual. 30:58-70.



Bundy, L.G., T. W. Andraski, and J.G. Lauer. 2001. Planting date and hybrid effects on optimum nitrogen rates for corn. ASA-CSSA-SSSA Annual Meeting Abstracts, 21-25 October, 2001. Charlotte NC.



Cassman K., T. Arkebauer, A. Dobermann, J. Lindquist, J. Markwell, L. Nelson, J. Specht, and D. Walters. 2001. Understanding yield potential and optimal soil productivity in irrigated maize systems. ASA/SSSA meeting,.21-25 October, Charlotte, NC.



Chung, S.W., P.W. Gassman, D.R. Huggins, and G.W. Randall. 2001. EPIC tile flow and nitrate loss predictions for three Minnesota cropping systems. J. Environ. Qual. 30:822-830.



Cowling,, C.E., J. Galloway, C. Furiness, M. Barber, T. Bresser, K. Cassman, J.W. Erisman, R. Haeuber, R. Howarth, J. Melillo, W. Moomaw, A. Mosier, K. Sanders, S. Seitzinger, S. Smeulders, R. Socolow, D. Walters, F. West, Z. Zhu. 2001. Optimizing N Management in Food and Energy Production and Environmental Protection. Summary Statement from the 2nd Int‘l N Conference, Potomac MD. 14-18 October, Ecol. Soc. Amer, Washington, D.C. 17 pp.



DeJoia. A.J. 2001. Corn response to nitrogen at various small-plot locations within a field. M.S. Thesis, Kansas State University, Manhattan, KS.



Fritz, V.A., G.W. Randall, and C.J. Rosen. 2001. Characterization and utilization of nitrogen contained in sweet corn silage waste. Agron. J. 93:627-633.



Huggins, D.R., G.W. Randall, and M.P. Russelle. 2001. Subsurface drain losses of water and nitrate following conversion of perennials to row crops. J. Environ. Qual. 93:477-486.



Heldt. A.A. 2000. Cover crop impacts on corn and soybean N acquisition and yield. Master of Science Thesis, 203pp. Department of Agronomy, Purdue University, May 2000.



Kelling, K.A., and L.G. Bundy. 2001. Economics of nitrogen fertilizer use with low crop prices. Proc. Wis. Fert. Aglime and Pest Mgmt. Conf. 40:8-14.



Khan, S.A., R.L. Mulvaney, and R.G. Hoeft. 2001. A simple soil test for detecting sites that are nonresponsive to nitrogen fertilization. Soil Sci. Soc. Am. J. 65:1751-1760.



Kucharik, C.J., K.R. Brye, J.M. Norman, J.A. Foley, S.T. Gower, and L.G. Bundy. 2001. Measurements and modeling of carbon and nitrogen cycling in agroecosystems of southern Wisconsin:Potential for SOC sequestration during the next 50 years. Ecosystems 4:237-258.



Mikha, M., R. Lamond, and C. W. Rice. 2002. The effect of tillage and nitrogen source on soil organic matter and resulting corn yield. Kansas Fertilizer Research Report.



Mitsch, W.J., J.W. Day, J.W. Gilliam, P.M. Groffman, D.L. Hey, G.W. Randall, and N. Wang. 2001. Reducing nitrogen loading to the Gulf of Mexico from the Mississippi River Basin: Strategies to counter a persistent ecological problem. BioScience 51:373-388.



Mulvaney, R.L., S.A. Khan, R.G. Hoeft, and H.M. Brown. 2001. A soil organic nitrogen fraction that reduces the need for nitrogen fertilization. Soil Sci. Soc. Am. J. 65:1164-1172



Randall, G.W., and M.J. Goss. 2001. Nitrate losses to surface water through subsurface, tile drainage. p. 95-122. In: R.F. Follett and J.L. Hatfield (Eds.) Nitrogen in the Environment: Sources, Problems, and Management. Elsevier Science B.V., Amsterdam.



Randall, G.W., and D.J. Mulla. 2001. Nitrate nitrogen in surface waters as influenced by climatic conditions and agricultural practices. J.Environ. Qual. 30:337-344.



Rickman, R.W., C.L. Douglas, Jr., S.L. Albrecht, L.G. Bundy, and J.L. Berc. 2001. CQESTR:a model to estimate carbon sequestration in agricultural soils. J. Soil Water Conserv. 56(3):237-242.



Sa, J.C. de M., C.C. Cerri, R. Lal, W.A. Dick, S.P.V. Filho, M.C. Piccolo, and B.E. Feigl. 2001. Organic matter dynamics and carbon sequestration rates for a tillage chronosequence in a Brazilian oxisol. Soil Science Society of America 65:1486-1499



Schmidt, J.P., A.J. DeJoia, R.B. Ferguson, R.K. Taylor, R. K. Young, and J.L. Havlin. Corn yield response to nitrogen at multiple in-field locations (accepted for publication in Agron. J.).



Studnicka, J.S., T. W. Andraski, and L.G. Bundy. 2001. Nitrogen tests to predict optimum N rates for winter wheat. ASA-CSSA-SSSA Annual Meeting Abstracts, 21-25 October, Charlotte, NC.



Tabatabai, M.A. and W.A. Dick. 2002. Enzymes in soil: Research and developments in measuring activities. p. 539-565. In: R.G. Burns and R.P. Dick (Eds.), Enzymes in the Environment. Marcel Dekker, New York.



Walters, D.T., I. Artikov, and G. Teichmeier. 2001. Differences among maize hybrids in specific leaf nitrogen and chlorophyll. ASA/SSSA Meeting, 21-25 October, Charlotte, NC.



Walters, D.T., A. Dobermann, J. Lindquist, K. Cassman, D. Binder and G. Teichmeier. 2001. N-use efficiency of irrigated maize under intensive and conventional best management. ASA/SSSA Meeting, 21-25 October, Charlotte, NC.



Walters, D.T., J. Lindquist, K. Cassman, A. Dobermann, L. Nelson, K. Russell, D.Binder, and G. Teichmeier. 2001. Maize performance under intensive and conventional management systems. 2001 ASA/SSSA Meeting, 21-25 October, Charlotte, NC.



Yang, H., K. Cassman, A. Dobermann, J. Kinery, J. Lindquist, T. Sinclair, and D. Walters. 2001. Simulating maize yield potential. ASA/SSSA Meeting, 21-25 October, Charlotte, NC.



Young. R.K. Variable-rate nitrogen management for irrigated corn. 2001. M.S. Thesis, Kansas State University, Manhattan, KS.

08/18/2003

Acosta-Martinez, V. and M.A. Tabatabai. 2001. Arylamidase activity of soils: effect of trace elements and relationships to soil properties and activities of amidohydrolases. Soil Biol. Biochem. 33:17-23.



Acosta-Martinez, V. and M.A. Tabatabai. 2002. Inhibition of arylamidase activity in soils by toluene. Soil Biol. Biochem 34:229-237.



Andraski, T.W. and L.G. Bundy. 2002. Using the presidedress soil nitrate test and organic nitrogen crediting to improve corn nitrogen recommendations. Agron. J. 94: 1411-1418.



Bundy, L.G. 2002. Approaches for implementing variable rate N applications. Proc. Wis. Fert. Aglime and Pest Mgmt. Conf. 41:52-54.



Bundy, L.G. and T.W. Andraski. 2002. Using the presidedress soil nitrate test and organic nitrogen crediting to improve corn nitrogen recommendations. In 2002 Agronomy abstracts. ASA, Madison, WI.



Cassman, K.G., A. Dobermann and D.T. Walters. 2002. Agroecosystems, nitrogen-use efficiency, and nitrogen management. Ambio. 13:132-140.



Dodor, D.E. 2002. Enzyme activities in soils as affected by long-term cropping systems. Ph.D Dissertation, Iowa State University. 268p.



Dodor, D.E. and M.A. Tabatabai. 2002. Effects of cropping systems and microbial biomass on arylamidase activity in soils. Biol. Fetil. Soils 35:253-261.



Dodor, D.E. and M.A. Tabatabai. 2003. Effect of cropping systems on phosphatases in soils. J. Plant Nutr. Soil Sci. 166:7-13.



Ekenler, M. 2002. Enzyme activities in soils as affected by management practices. Ph.D Dissertation, Iowa State University. 280 p.



Ekenler, M. and M.A. Tabatabai. 2002. Effects of trace elements on B-glucosaminidase activity in soils. Soil Biol. Biochem. 34:1829-1832.



Ekenler, M. and M.A. Tabatabai. 2002. B-Glucosaminidase activity of soils: effect of cropping systems and its relationship to nitrogen mineralization. Biol Fertil Soils 36:307-376.



Ekenler, M. and M.A. Tabatabai. 2002. Liming and tillage effects of the activities of fifteen enzymes in soils. Agron. Abstr. (on CD).



Ekenler, M. and M.A. Tabatabai. 2002. B-Glucosaminidase activity and nitrogen mineralization in soils under different cropping systems. Agron. Abstr. (on CD).



Hanson, M., T. Novak and L. Bundy. 2002. Evaluating optimum sidedress N application rates for corn following soybeans. Proc. Wis. Fert. Aglime and Pest Mgmt. Conf. 41:299-303.



Khan, S.A., R.L. Mulvaney and R.G. Hoeft. 2001. A simple soil test for detecting sites that are nonresponsive to nitrogen fertilizers. Soil Sci. Soc. of Amer. J. 65: 1751-1760.



Kramer, A.W., T.A. Doane, W.R. Horwath and C. van Kessel. 2002. Combining fertilizer and organic inputs to synchronize N supply in alternative cropping systems in California. Agriculture, Ecosystems and Environment 91:233-243.



Lacorbiniere-Jn-Baptiste, M. 2002. Nutrient-enriched mixtures of exogenous humic substances as organic fertilizers. M.S. Thesis. Iowa State University, Ames. 108p.



Randall, G. W. 2002. The impact of climate and agricultural practices on nitrogen losses in tile drainage in Minnesota. Hydrological Sci and Technol. 18:187-195.



Tabatabai, M.A. A.M. Garcia-Manzanedo and V. Acosta-Martinez. 2002. Substrate specificity of arylamidase in soils. Soil Biol. Biochem. 34:103-110.



Yang, H, K.G. Cassman, A. Dobermann and D. Walters, 2002. Sensitivity of C sequestration to net primary productivity and tillage in irrigated maize systems. Presentation to the American Soc. of Agronomy and Soil Science Soc. of Am. annual meeting, Nov 10-14, Indianapolis, IN.

05/18/2004

Al-Turki, A.I. and W.A. Dick. 2003. Myrosinase activity in soil. Soil Science Society of America Journal 67:139-145.

Bird, J.A., C. van Kessel, and W.R. Horwath. 2003. Stabilization and 13C-Carbon and immobilization of 15N-Nitrogen from rice straw in humic fractions. Soil Sci. Soc. Am. J. 67:806-816.

Boast, C.W., T.R. Ellsworth, T.J. Smith, R.L. Mulvaney, S.A. Khan, E.M. El-Naggar, and R.G. Hoeft. 2003. Spatial and temporal variability in the Illinois N test. In: Illinois Fertilizer Conference Proceedings 2003 (R.G. Hoeft, ed.). pp. 15-19.

Bonta, J.V. and W.A. Dick. 2003. Impact of coal surface mining and reclamation on surface water chemical concentrations and load rates in three Ohio watersheds. Journal of the American Water Resources Association 39:793-815.

Brye, K.R., J.M. Norman, S.T. Gower, and L.G. Bundy. 2003. Effects of management practices on annual net N-mineralization in a restored prairie and maize agroecosystems. Biogeochemistry 63:135-160.

Brye, K.R., J.M. Norman, S.T. Gower, and L.G. Bundy. 2003. Methodological limitations and N-budget differences among a restored tallgrass prairie and maize agroecosystems. Agriculture, Ecosystems and Environment 97:181-198.

Bundy, L.G. 2003. Long-term nitrogen fertilizer effects on corn yields and soil properties. In Proc. 33rd North Central Extension-Industry Soil Fert. Conf., Des Moines, IA, 19-20 November 2003. 19:145-150.

Cassman, K.G., A. Dobermann D.T. Walters and H. Yang. 2003. Meeting cereal demand while protecting natural resources and improving environmental quality. Annu. Rev. Environ. and Resour. 28:315-58.

Dick, W.A. 2003. Soil Genesis and Classification: Fifth Edition. Journal of Environmental Quality 32:1573.

Doane, T.A., O.C. Devêvre, and W.R. Horwáth. 2003. Short-term soil carbon dynamics of humic fractions in low-input and organic cropping systems. Geoderma 114:319-331.

Dodor, D.E. and Tabatabai, M.A. 2003. Amidohydrolases in soils as affected by cropping systems. Appl. Soil Ecol. 24:73-90.

Dodor, D.E. and Tabatabai, M.A. 2003. Effect of cropping systems on phosphatases in soils. J. Plant Nutr. Soil Sci. 166:7-13.

Ekenler, M. and Tabatabai, M.A. 2003. Effect of liming and tillage systems on microbial biomass and glycosidases in soils. Biol. Fertil Soils 39:51-61.

Ekenler, M. and Tabatabai, M.A. 2003. Response of phosphatases and arylsulfatase in soils to liming and tillage systems. J. Plant Nutr. Soil Sci. 166:281-290

Ekenler, M. and Tabatabai, M.A. 2003. Tillage and residue management effects on B-glucosaminidase activity in soils. Soil Biol. Biochem. 35:871-874.

Klose, S. and Tabatabai, M.A. 2002. Response of amidohydrolases in soils to chloroform fumigation. J. Plant Nutr. Soil Sci. 165:125-132.

Klose, S. and Tabatabai, M.A. 2002. Response of glycosidases in soils to chloroform fumigation. Biol. Fertil. Soils 35:262-269.

Klose, S. and Tabatabai, M.A. 2002. Response of phosphomonoesterases in soils to chloroform fumigation. J. Plant Nutr. Soil Sci. 165:1429-1434.

Kpomblekou-A, K. and Tabatabai, M.A. 2003. Effect of low-molecular weight organic acids on phosphorus release and phytoavailability of phosphorus in phosphate rocks added to soils. Agric. Ecosys. Environ. 100:275-284.

Martens, D.A. and W. Dick. 2003. Recovery of fertilizer nitrogen from continuous corn soils under contrasting tillage management. Biology & Fertility of Soils 38:144-153.

Pearson, W.W., R.F. Hensler, B.H. Shaw, and L.G. Bundy. 2003. Residual soil nitrogen and nitrogen response of corn on sandy loam soils. Proc. Wis. Fert. Aglime and Pest Mgmt. Conf. 42:286-300.

Randall, G. W., J. A Vetsch, and J. R. Huffman. 2003. Nitrate losses in subsurface drainage from a corn-soybean rotation as affected by time of nitrogen application and use of nitrapyrin. J. Environ. Qual. 32:1764-1772.

Randall, G. W., J. A. Vetsch, and J. R. Huffman. 2003. Corn production on a subsurface-drained mollisol as affected by time of nitrogen application and nitrapyrin. Agron. J. 95:1213-1219.

Randall, G., M. Schmitt, J. Strock, J. Lamb. 2003. Validating N rates for corn on farm fields in southern Minnesota. Univ. Minnesota Ext. Bul. 07936.

Tabatabai, M.A. 2002. Soil enzymes. 5:2899-2910. In: The Encyclopedia of Environmental Microbiology. G. Bitton (ed.), Wiley, New York.

Tabatabai, M.A. 2003. Soil enzymes. 3:1415-1462. In: The Encyclopedia of Agrochemicals, Wiley, New York.

van Groenigen, J.W., C.S. Mutters, W.R.Horwath, and C. van Kessel. 2003. NIR and DRAFT-MIR spectrometry of soils for predicting soil and crop parameters in a flooded field. Plant and Soil 250:155-165.

Walters, D.T., A. Dobermann, T. Arkebauer, K. Cassman, R. Drijber , J. Lindquist, J. Specht, H. Yang, D. Binder, G. Teichmeier, D. Miller. 2003. Intensification of maize systems: Impact on yield, nutrient use efficiency, and soil quality. Presentation to the American Soc. of Agronomy and Soil Science Soc. of Am. annual meeting, Nov. 2-6. Denver, CO.

Y. Li, W.A. Dick and O.H. Tuovinen. 2003. Evaluation of fluorochromes for imaging bacteria in soil. Soil Biology & Biochemistry 35:737-744.

06/18/2005

Bundy, L.G. 2004. Long-term nitrogen fertilization effects on corn yields and soil properties. Proc. Wis. Fert. Aglime and Pest Mgmt. Conf. 43:84-88.

Bundy, L.G. 2004. Potential for N carryover from 2003 to 2004. Proc. Wis. Fert. Aglime and Pest Mgmt. Conf. 43:5-9.

Bundy, L.G., and T.W. Andraski. 2004. Diagnostic tests for site-specific nitrogen recommendations for winter wheat. Agron. J. 96:608-614.

Doane, T.A. and W.R. Horwath. 2004. Annual dynamics of soil organic matter in the context of long-term trends. Global Biogeochemical Cycles 18:1-11.

Ekenler M, Tabatabai MA. 2004. Arylamidase and amidohydrolases in soils as affected by liming and tillage systems. Soil & Tillage Res. 77: 157-168.

Ekenler M, Tabatabai MA. 2004. beta-glucosaminidase activity as an index of nitrogen mineralization in soils. Comm. Soil Sci. Plant Anal. 35: 1081-1094.

Ferguson, R.B., A. Dobermann, C.S. Wortmann, D.T. Walters, C.A. Shapiro, D. Tarkalson, and D.D. Baltensperger. 2004. Developing recommendations for site-specific nitrogen management of irrigated maize. In: Proceedings of the 7th International Conference on Precision Agriculture and Other Resource Management, July 25-28, 2004, Bloomington, MN. CD-Rom. ASA, CSSA, SSSA, Madison, WI.

Koivunen, M.E. and W.R. Horwath. 2004. Effect of Management history and temperature on the mineralization of methylene urea in soil. Nutrient Cycling in Agroecosystems 68:25-34.

Koivunen, M.E. and W.R. Horwath. 2005. Methylene urea as a slow-release nitrogen sources for processing tomatoes. Nutrient Cycling in Agroecosystems 71:177-190.

Legorreta, F., D.T. Walters, D.C.Olk, S. Madhavan, and K.G. Cassman. 2004. Long term Management Effects on the Mobile Humic Acid Fraction. Agronomy Abstracts of the American Society of Agronomy Annual Meeting, Seattle, WA. 10/31/2004

Onsoy, Y.S., Harter, T., Ginn, T.R., and W.R. Horwath. 2005. Spatial variability and transport of nitrate in a deep alluvial vadose zone. Vadose Zone Journal 4:41-54.

Osterhaus, J.T., and L.G. Bundy. 2004. Evaluation of soil nitrogen tests for predicting corn nitrogen needs. In Agronomy Abstracts (CD), American Society of Agronomy, Madison,
WI.

R.G. Hoeft, R.L. Mulvaney, S.Khan, E.D. Nafziger, J.J. Warren, L.C. Gonzini, T.K. Lehman, and A. Gulso. 2004. Illinois soil N test: temporal and spatial variation and prediction of N response. In: Illinois Fertilizer Conference Proceedings 2004 (R.G. Hoeft, ed.). pp. 38-46.

R.L. Mulvaney, S.A. Khan, J.J. Warren, L.C. Gonzini, T.J. Smith, and R.G. Hoeft. 2004. Potential of the Illinois soil nitrogen test to improve nitrogen fertilizer management for corn production. In: Illinois Fertilizer Conference Proceedings 2004 (R.G. Hoeft, ed.). pp. 29-38.

Seiter, S. and W.R. Horwath. 2004. Strategies for Managing Soil Organic Matter to Supply Plant Nutrients. In: Magdoff, F. and R.R. Weil, editors. Chp. 9, pp. 269-293. Soil Organic Matter in Sustainable Agriculture. CRC Press.

Walters, D.T., A. Dobermann, K.G. Cassman, R.A. Drijber, J.L. Lindquist, J.E. Specht, and H.S. Yang. 2004. Changes in nitrogen use efficiency and soil quality after five years of managing for high yield corn and soybean. In Proc. of the 34st North-Central Industry-Extension Soil Fertility Conference, November 17-18, 2004, Des Moines, IA.

Yang, H.S., A. Dobermann, K.G. Cassman, and D.T. Walters. 2004. DK-C&N -- a simulation model for C and N mineralization using the approach of dynamic rate constant. In: Proceedings of the 2004 Biological Systems Simulation Conference, March 8-10, 2003, 11/2004 : 85-86 Gainesville, FL. , Gainesville, FL.

05/09/2006

Andraski, T.W., and L.G. Bundy. 2005. Cover crop effects on corn yield response to nitrogen on an irrigated sandy soil. Agron. J. 97:1239-1244.
Bundy, L. 2005. How do we improve N application to increase N-use efficiency? In Annual meetings abstracts [CD-ROM]. ASA, CSSA, and SSSA, Madison, WI.

Bundy, L.G. 2005. Should soybean N credits be taken in 2005? Proc. Wis. Fert. Aglime and Pest Mgmt. Conf. 44:112-117.
Bundy, L.G., and T.W. Andraski. 2005. Recovery of fertilizer nitrogen in crop residues and cover crops on an irrigated sandy soil. Soil Sci. Soc. Am. J. 69:640-648.

Bundy, L. and C. Laboski. 2005. Optimum nitrogen rates for corn and the Illinois soil nitrogen test. Wisconsin Crop Manager. 12:212-213.
Clay, D.E., N. Kitchen, C.G. Carlson. J. Kleinjan, 2006. SSMG- 42. A first step in precision nutrient management: Sampling old farmsteads separately from the rest of the field. Clay et al. (Ed) Site Specific Management Guidelines. Potash and Phosphate Institute. Norcross, GA.

Chang, J., and D.E. Clay. 2006. Identifying factors for yield prediction models and evaluating model selection methods. Korean Crop Sci. Soc. J. Korean J Crop Science 50:268-275.

Clay, D.E., C.G. Carlson, S.A. Clay, C. Reese, Z. Liu, and M.M. Ellsbury. 2006. Theoretical Derivation of New Stable and Non-isotopic Approaches for Assessing Soil Organic C Turnover. Agron. J. (In press).

Clay, D.E., Ki-In Kim, J. Chang, S.A. Clay, and K. Dalsted. 2006. Characterizing water and N stress in corn using remote sensing. Agron. Journal. (In press).

Clay, D.E., C.G. Carlson, S.A. Clay, J. Chang, and D.D. Malo. 2005. Soil organic C maintenance in a corn (Zea mays L.) and soybean (Glycine max L.) as influenced by elevation zone. Journal of Soil Water and Conservation. 60:342-348.

Clay, D.E., S.A. Clay, D.J. Lyon, and J.M. Blumenthal. 2005. Can 13C discrimination in corn (Zea mays) grain be used to characterize intra-plant competition for water and nitrogen? Weed Sci. 53:23-29.

Dobermann, A., D.T. Walters, F. Legoretta, T.J. Arkebauer, K.G. Cassman, R.A. Drijber, J.L. Lindquist, J.E. Specht, and H.S. Yang. 2005. Unlocking the secrets of carbon and nitrogen cycling in soil. Fluid J. 13:8-10.

Ferguson, R., G. Hergert, D. Walters, C. Shapiro, A. Dobermann, K. Cassman, C. Wortmann and D. Tarkalson. 2005. Nitrogen Fertilizer Use in Nebraska Over the Past Fifty Years. Agronomy Abstracts of the American Society of Agronomy Annual Meeting, Salt Lake City, UT.

Ferguson, R.B., A. Dobermann, C.S. Wortmann, D.T. Walters, C.A. Shapiro, D. Tarkalson, and D.D.Baltensperger.2004. Developing recommendations for site-specific nitrogen management of irrigated maize. In: Proceedings of the 7th International Conference on Precision Agriculture and Other Resource Management, July 25-28, 2004, Bloomington, MN. CD-ROM. . ASA, CSSA, SSSA, Madison, WI.

Legoretta, F. 2005. Effect of cropping system and management on the storage and release of C and N from soil humic acid pools. PhD dissertation, University of Nebraska  Lincoln. Department of Agronomy and Horticulture.

Lindquist, J.L., Arkebauer, T.J., Walters, D.W., Cassman, K.G., Dobermann, A. (2005, 10/20). Maize radiation use efficiency under optimal growth conditions. Agronomy Journal, 97 (2005): 72 -78.

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