Projects

SUSTAINABLE DRYLAND CROPPING SYSTEM FOR THE CENTRAL GREAT PLAINS Appropriated (D)   Accession Number: 420253

DEVELOPMENT OF CROP PRODUCTION SYSTEMS AND ALTERNATIVE BIO-ENERGY CROPS FOR THE CENTRAL GREAT PLAINS REGION Specific Cooperative Agreement (S)   Accession Number: 416537

Publications (Clicking on the reprint icon will take you to the publication reprint.)

Soil carbon changes influenced by soil management and calculation method - (Peer Reviewed Journal) - (01-Apr-13)

Long-term tillage impacts on soil aggregation and carbon dynamics under wheat-fallow in the central Great Plains - (Peer Reviewed Journal)

Mikha, M.M., Vigil, M.F., Benjamin, J.G. 2013. Long-term tillage impacts on soil aggregation and carbon dynamics under wheat-fallow in the central Great Plains. Soil Science Society of America Journal. 77:594-605.

Rapid changes in microbial biomass and aggregate size distribution in response to changes in organic matter management in grass pasture - (Peer Reviewed Journal)

Hurisso, T.T., Davis, J.G., Brummer, J.E., Stromberger, M.E., Mikha, M.M., Haddix, M.L., Booher, M.R., Paul, E.A. 2012. Rapid changes in microbial biomass and aggregate size distribution in response to changes in organic matter management in grass pasture. Geoderma. 193-194:68-75.

Tillage and nutrient sources impact the productivity of eroded soil - (Abstract Only) - (18-Jul-12)

Comparison of methods to evaluate soil and crop management-induced soil carbon changes - (Proceedings)

Mikha, M.M., Benjamin, J.G., Halvorson, A.D., Nielsen, D.C. 2012. Comparison of methods to evaluate soil and crop management-induced soil carbon changes. 2012 Great Plains Soil Fertility Conference Proceedings. 14:258-264. March 6-7, 2012. Denver, Colo.

Organic amendment and residue removal rates influence soil productivity - (Research Notes)

Mikha, M.M., Schlegel, A.J. 2012. Organic amendment and residue removal rates influence soil productivity. Extension Reports. 1066:29-30.

Management practices influence productivity of degraded or eroded soils - (Research Notes)

Mikha, M.M., Stahlman, P.W., Benjamin, J.G., Geier, P.W. 2012. Management practices influence productivity of degraded or eroded soils. Kansas Fertilizer Research Extension Reports. 1066:26-28.

Multi-Location Study of Soil Enzyme Activities as affected by Different Manure Types, Rates, and Tillage Application Practices - (Peer Reviewed Journal)

Acosta Martinez, V., Mikha, M.M., Sistani, K.R., Stahlman, F., Benjamin, J.G., Vigil, M.F., Erickson, R. 2011. Multi-location study of soil enzyme activities as affected by different manure types, rates, and tillage application practices. Agriculture. 1(1): 4-21.

Soil enzyme activities as affected by manure types, rates and tillage practices - (Abstract Only)

Acosta Martinez, V., Mikha, M.M., Sistani, K.R., Stahlman, P.W., Benjamin, J.G., Vigil, M.F., Erickson, R. 2011. Soil enzyme activities as affected by manure types, rates and tillage practices[abstract]. American Society of Agronomy, Crop Science Society of America, Soil Science Society of America Annual Meeting. October 16-19, 2011, San Antonio, Texas.

Methods to evaluate soil and crop management-induced soil carbon changes - (Abstract Only) - (12-Apr-11)

Increasing the sink: agricultural management and soil carbon dynamics: western U.S. croplands. In: Liebig, M., Franzluebbers, A., and Follet, R., editors. Managing agricultural greenhouse gasses. 1st edition. Waltham, MA - (Book / Chapter)

Collins, H.P., Mikha, M.M., Brown, T.T., Smith, J.L., Huggins, D.R., Sainju, U.M. 2012. Increasing the sink: agricultural management and soil carbon dynamics: western U.S. croplands. In: Liebig, M., Franzluebbers, A., and Follet, R., editors. Managing agricultural greenhouse gasses. 1st edition. Waltham, MA. Elsevier. p. 59-78.

Diffuse-Reflectance Mid-Infrared Spectral Properties of Soils under Alternative Crop Rotations in a Semiarid Climate - (Peer Reviewed Journal)

Calderon, F.J., Mikha, M.M., Vigil, M.F., Nielsen, D.C., Benjamin, J.G., Reeves III, J.B. 2012. Diffuse-reflectance mid-infrared spectral properties of soils under alternative crop rotations in a semiarid climate. Communications in Soil Science and Plant Analysis. 42:17, 2143-2159.

Addition of cover crops enhances no-till potential for improving soil physical properties - (Peer Reviewed Journal)

Blanco, H., Mikha, M.M., Presley, D.R., Claassen, M.M. 2011. Addition of cover crops enhances no-till potential for improving soil physical properties. Soil Science Society of America Journal. 75(4):1471-1482.

Nutrient Source and Tillage Impact on Corn Grain Yield and Soil Properties - (Peer Reviewed Journal)

Sistani, K.R., Mikha, M.M., Warren, J.G., Gilfillen, B., Acosta Martinez, V. 2011. Nutrient Source and Tillage Impact on Corn Grain Yield and Soil Properties. Soil Science. 175(12):593-600.

Management practices to improve soil quality and productivity of eroded soil - (Abstract Only) - (04-May-10)

Cropping Intensity Impacts on Soil Aggregation and Carbon Sequestration in the Central Great Plains - (Peer Reviewed Journal)

Mikha, M.M., Benjamin, J.G., Vigil, M.F., Nielsen, D.C. 2010. Cropping Intensity Impacts on Soil Aggregation and Carbon Sequestration in the Central Great Plains. Soil Science Society of America Journal. 74(5):1712-1719. doi:10.2136/sssaj2009.0335.

Nutrient Source and Tillage Impact on Corn Grain Yield and Soil Properties - (Abstract Only)

Sistani, K.R., Mikha, M.M., Warren, J.G., Gilfillen, B., Acosta Martinez, V., Willian, T. 2010. Nutrient Source and Tillage Impact on Corn Grain Yield and Soil Properties. ASA-CSSA-SSSA Annual Meeting Abstracts. 314-7.

Remediation/Restoration of Degraded Soil to Improve Productivity In The Central Great Plains Region - (Proceedings)

Mikha, M.M., Stahlman, P.W., Benjamin, J.G., Vigil, M.F., Geier, P.W., Poss, D.J. 2010. Remediation/Restoration of Degraded Soil to Improve Productivity In The Central Great Plains Region. Proceedings of the Great Plains Soil Fertility Conference. Pages 229-235. March 2-3, 2010. Denver, CO.

Crop Management Effects on Crop Residue Production and Changes in Soil Organic Carbon in the Central Great Plains - (Peer Reviewed Journal)

Benjamin, J.G., Halvorson, A.D., Nielsen, D.C., Mikha, M.M. 2010. Crop Management Effects on Crop Residue Production and Changes in Soil Organic Carbon in the Central Great Plains. Agronomy Journal. 102:990-997.

Soil Carbon Fractionation under Perennial Forage - (Abstract Only) - (23-May-09)

Alternative Dryland Cropping Systems to Wheat Fallow - (Abstract Only)

Vigil, M.F., Nielsen, D.C., Benjamin, J.G., Calderon, F.J., Mikha, M.M. 2009. Alternative Dryland Cropping Systems to Wheat Fallow. Agronomy Abstracts. Presented at the ASA-CSSA-SSSA Annual meeting. Nov. 1-5, 2009. Pittsburg, PA.

Regional Study of No-Till Impacts on Near-Surface Aggregate Properties that Influence Soil Erodibility - (Peer Reviewed Journal)

Blanco-Cangui, H., Mikha, M.M., Benjamin, J.G., Stone, L.R., Schlegel, A.J., Lyon, D.J., Vigil, M.F., Stahlman, P.W. 2009. Regional Study of No-Till Impacts on Near-Surface Aggregate Properties that Influence Soil Erodibility. Soil Science Society of America Journal 73:1361-1368.

Management Practices to Improve Productivity of Degraded/Eroded Soils - (Research Notes)

Mikha, M.M., Stahlman, P.W., Benjamin, J.G., Geier, P.W. 2009. Management Practices to Improve Productivity of Degraded/Eroded Soils. 2009 Kansas Fertilizer Research Extension Report. Pages 115-117.

No-Till Management Effects on Soil Water and Wind Erodibility Parameters - (Research Notes)

Blanco, H., M.M. Mikha, J.G. Benjamin, L.R. Stone, A.J. Schlegel, D.J. Lyon, M.F. Vigil, and P.W. Stahlman. 2009. No-Till Management Effects on Soil Water and Wind Erodibility Parameters. 2009 Kansas Fertilizer Research Extension Report. Pages 100-105.

Predicting Winter Wheat Yield Loss from Soil Compaction in the Central Great Plains of the United States - (Book / Chapter)

Benjamin, J.G., Mikha, M.M. 2010. Predicting Winter Wheat Yield Loss from Soil Compaction in the Central Great Plains of the United States. Book Chapter:Land Degradation and Desertification: Assessment, Mitigation and Remediation 49:649-656. Doi: 10.1007/978-90-481-8657-0.

Restoration of Degraded/Eroded Soil under Different Management Practices in the Central Great Plains - (Abstract Only)

Mikha, M.M., Benjamin, J.G., Stahlman, P.W., Vigil, M.F. 2009. Restoration of Degraded/Eroded Soil under Different Management Practices in the Central Great Plains. Agronomy Abstracts. Presented at the ASA-CSSA-SSSA annual meetings. Nov. 1-5, 2009. Pittsburg, PA.

Soil Organic Matter in Agricultural Systems - (Abstract Only)

Mikha, M.M. 2009. Soil Organic Matter in Agricultural Systems. Meeting Abstract. Presented at the 2009 Farmers Agriculture, Conservation and Technology Conference. Liberal, KS. Jan. 13, 2009.

Management Practices Effect Soil Quality and Plant Productivity - (Abstract Only)

Mikha, M.M. 2009. Management Practices Effect Soil Quality and Plant Productivity. Meeting Abstract. Presented as a keynote speaker at the 2009 Farmers Agriculture, Conservation and Technology Conference. Liberal, KS. Jan. 14, 2009.

Soil Processes and Residue Harvest Management - (Book / Chapter)

Johnson, J.M., Papiernik, S.K., Mikha, M.M., Spokas, K.A., Tomer, M.D., Weyers, S.L. 2009. Soil Processes and Residue Harvest Management. In: Lal, R., Stewart, B.A., editors. Soil Quality and Biofuel Production. Advances in Soil Science. Boca Raton, FL: CRC Press. p. 1-44.

Gas Flux in Tillage Field That Have Been in No-Tillage for 12 Years - (Abstract Only)

Mikha, M.M., Vigil, M.F., Calderon, F.J. 2008. Gas Flux in Tillage Field That Have Been in No-Tillage for 12 Years. Agronomy Abstract. Presented at the International American Society of Agronomy meetings, Crop Science Society of America and Soil Science Society of America (ASA/CSSA/SSSA) annual meetings. Oct. 5-9, 2008. Houston, TX.

Alternative Crop Rotations in the Semi-arid Central Great Plains Region: How Much Fallow? Evaluating the Economics - (Proceedings)

Vigil, M.F., Mikha, M.M., Nielsen, D.C., Benjamin, J.G., Calderon, F.J. 2008. Alternative Crop Rotations in the Semi-arid Central Great Plains Region: How Much Fallow? Evaluating the Economics. Meeting Proceedings. Presented at the XXI Congreso Argentino de la Ciencia Del Suelo. 13 al 16 de Mayo de 2008. Potrero de los Funes (San Luis) Argentina. Page 524.

Organic Carbon Effects on Soil Physical and Hydraulic Properties in a Semi-arid Climate - (Peer Reviewed Journal)

Benjamin, J.G., Mikha, M.M., Vigil, M.F. 2008. Organic Carbon Effects on Soil Physical and Hydraulic Properties in a Semi-arid Climate. Soil Science Society of America Journal. 72:1357-1362. doi:10.2136/sssaj2007.0389.

Long-Term Tillage Affects on Soil Aggregation and Carbon Sequestration - (Abstract Only)

Mikha, M.M., Benjamin, J.G., Vigil, M.F. 2008. Long-Term Tillage Affects on Soil Aggregation and Carbon Sequestration. Meeting Abstract. Presented at the Colorado Conservation Tillage meeting. Feb. 5-6, 2008. Greeley, Colo.

Best Management Practices for Remediation/Restoration of Degraded Soils in the Central Great Plains Region - (Proceedings)

Mikha, M.M., Vigil, M.F., Benjamin, J.G., Poss, D.J., Calderon, F.J. 2008. Best Management Practices for Remediation/Restoration of Degraded Soils in the Central Great Plains Region. Meeting Proceedings of the 18th High Altitude Revegetation Workshop #18. Information Series #105. Pages 461-470. March 4-6, 2008. Fort Collins, Colo.

A Comparison of Dryland Grasspea (Lathyrus sativus L.) and Admiral Pea (Pisum sativum L.) Grown Under Different Row Spacings - (Proceedings)

Calderon, F.J., Vigil, M.F., Nielsen, D.C., Benjamin, J.G., Mikha, M.M. 2008. A comparison of Dryland Grasspea (lathyrus sativus l.) and Admiral Pea (pisum sativum l.) Grown Under Different Row Spacings. Meeting Proceedings. Presented at the 2008 Great Plains Soil Fertility Conference. Denver, Colo. March 5, 2008. Vol. 12:107-111.

Soil Aggregation and Carbon Sequestration as affected by Long-Term Tillage Practices - (Abstract Only)

Mikha, M.M., Benjamin, J.G., Vigil, M.F. 2007. Soil Aggregation and Carbon Sequestration as affected by Long-Term Tillage Practices. Agronomy Abstracts. Presented at the International American Society of Agronomy Meetings, Crop Science Society of America and Soil Science Society of America (ASA/CSSA/SSSA) annual meetings. Nov. 5-9, 2007. New Orleans, LA.

Cropping Intensity Effects on Organic Carbon, Aggregate Stability, and Hydraulic Properties of a No-till Loam - (Abstract Only)

Benjamin, J.G., Mikha, M.M. 2007. Cropping Intensity Effects on Organic Carbon, Aggregate Stability, and Hydraulic Properties of a No-till Loam. Agronomy Abstracts. Presented at the International American Society of Agronomy meetings, Crop Science Society of America and Soil Science Society of America (ASA/CSSA/SSSA) annual meetings. Nov. 5-9, 2007. New Orleans, LA.

Management of Dryland Cropping Systems in the U.S. Great Plains: Effects on Soil Organic Carbon - (Book / Chapter)

Liebig, M.A., Mikha, M.M., Potter, K.N. 2009. Management of Dryland Cropping Systems in the U.S. Great Plains: Effects on Soil Organic Carbon. Soil Science Society of America Special Publication Book Chapter. P. 97-113. In: R. Lal and R.F. Follett (Eds.) Soil carbon sequestration and the greenhouse effect, 2nd Ed. SSSA Spec. Publ. 57. ASA-CSSA-SSSA, Madison, WI.

Microbial communities and enzyme activities in soils under alternative crop rotations compared to wheat-fallow for the Central Great Plains - (Peer Reviewed Journal)

Acosta Martinez, V., Mikha, M.M., Vigil, M.F. 2007. Microbial communities and enzyme activities in soils under alternative crop rotations compared to wheat-fallow for the Central Great Plains. Applied Soil Ecology. 37:41-52.

Cropping Intensity Effects on Physical Properties of a No-till Silt Loam Soil - (Peer Reviewed Journal)

Benjamin, J.G., Mikha, M.M., Nielsen, D.C., Vigil, M.F., Calderon, F.J., Henry, W.B. 2007. Cropping Intensity Effects on Physical Properties of a No-till Silt Loam Soil. Soil Science Society of America Journal 71:1160-1165.

Soil Carbon and Enzyme Activities as affected by Cropping Intensity and Tillage - (Abstract Only)

Mikha, M.M., Acosta Martinez, V., Vigil, M.F. 2007. Soil Carbon and Enzyme Activities as affected by Cropping Intensity and Tillage. Meeting Abstract.

Soil Aggregation and Enzyme Activities as affected by Management Practices - (Abstract Only)

Mikha, M.M., Acosta Martinez, V., Vigil, M.F. 2006. Soil Aggregation and Enzyme Activities as affected by Management Practices. Agronomy Abstracts. Presented at the International American Society of Agronomy Meetings/Soil Science Society of America (ASA/CSSA/SSSA) Annual Meetings. November 12-16, 2006. Indianapolis, IN.

GREENHOUSE GAS REDUCTION THROUGH AGRICULTURAL CARBON ENHANCEMENT NETWORK (GRACENET)-PROGRESS REPORT - (Other)

Follett, R.F., Johnson, J.M., Parkin, T.B., Smith, J.L., Franzluebbers, A.J., Sainju, U.M., Zobeck, T.M., Collins, H.P., Mikha, M.M. 2006. Greenhouse gas reduction through agricultural carbon enhancement network (gracenet)-progress report. Agricultural Research Service Publication.

ESTIMATING SOIL MINERALIZABLE N UNDER DIFFERENT MANAGEMENT PRACTICES - (Peer Reviewed Journal)

Mikha, M.M., Rice, C.W., Benjamin, J.G. 2006. Estimating soil mineralizable Nitrogen under different management practices. Soil Science Society of America Journal.70:1522-1531.

CROPPING INTENSITY AND TILLAGE AFFECTS ON CARBON SEQUESTRATION AND ENZYME ACTIVITIES - (Abstract Only)

Mikha, M.M., Acosta Martinez, V., Vigil, M.F. 2006. Cropping intensity and tillage affects on carbon sequestration and enzyme activities. Meeting of the 18th World Congress of Soil Science. July 9-15, 2006. Philadelphia, Pennsylvania.

MANAGEMENT EFFECTS ON SOIL PHYSICAL PROPERTIES IN LONG-TERM TILLAGE STUDIES IN KANSAS - (Peer Reviewed Journal)

Mcvay, K.A., Budde, J.A., Fabrizzi, K., Mikha, M.M., Rice, C.W., Schlegel, A.J., Peterson, D.E., Sweeney, D.W., Thompson, C. 2006. Management effects on soil physical properties in long-term tillage studies in Kansas. Soil Science Society of America Journal. 70:434-438. Doi:10.2136/sssaj2005.0249.

CARBON SEQUESTRATION AND AGGREGATE SIZE DISTRIBUTION AS AFFECTED BY CROPPING INTENSITY - (Abstract Only)

Mikha, M.M., Vigil, M.F., Benjamin, J.G., Nielsen, D.C., Henry, W.B., Calderon, F.J. 2005. Carbon sequestration and aggregate size distribution as affected by cropping intensity. Agronomy Abstract. Presented at the 2005 ASA, CSSA-SSSA International Annual Meeting. Nov. 6-10, 2005. Salt Lake City, UT.

HOW MUCH FALLOW; EVALUATING THE ECONOMICS OF ALTERNATIVE ROTATIONS AT AKRON, COLORADO - (Abstract Only)

Vigil, M.F., Nielsen, D.C., Henry, W.B., Benjamin, J.G., Mikha, M.M., Calderon, F.J. 2005. How much fallow: Evaluating the economics of alternative rotations at Akron, Colorado. Agronomy Abstract. Presented at the 2005 ASA,CSSA-SSSA International Annual Meeting. Nov. 6-10, 2005. Salt Lake City, UT

CROPPING SYSTEM INFLUENCES ON SOIL CHEMICAL PROPERTIES AND SOIL QUALITY IN THE GREAT PLAINS - (Peer Reviewed Journal)

Mikha, M.M., Vigil, M.F., Liebig, M.A., Bowman, R.A., Mcconkey, B., Deibert, E., Pikul Jr, J.L. 2006. Cropping system influences on soil chemical properties and soil quality in the Great Plains. Renewable Agriculture and Food System. 21(1); 26-35. Online DOI:10.1079/RAF2005123.

CROPPING SYSTEM EFFECTS ON SOIL QUALITY IN THE GREAT PLAINS: SYNTHESIS FROM A REGIONAL PROJECT - (Peer Reviewed Journal)

Wienhold, B.J., Pikul Jr, J.L., Liebig, M.A., Mikha, M.M., Varvel, G.E., Andrews, S.S., Doran, J.W. 2005. Cropping system effects on soil quality in the great plains: synthesis from a regional project. Renewable Agriculture and Food System 21:49-59.

SOIL CARBON AND NITROGEN IN DRYLAND CROPPING SYSTEMS - (Abstract Only)

Mikha, M.M., Vigil, M.F. 2005. Soil carbon and nitrogen in dryland cropping systems. Meeting Abstract. Third USDA Symposium on Greenhouse Gases & Carbon Sequestration in Agriculture and Forestry. March 21-24, 2005. Baltimore, Maryland. p. 175.

CHANGES IN SOIL AFTER 14 YEARS OF NO-TILL ALTERNATIVE CROP ROTATION RESEARCH - (Proceedings)

Vigil, M.F., Nielsen, D.C., Benjamin, J.G., Henry, W.B., Mikha, M.M., Calderon, F.J., Anderson, R.L., Bowman, R.A. 2005. Changes in soil after 14 years of no-till alternative crop rotation research. Proceedings of the 17th Annual Winter Conference, Colorado Conservation Tillage Association in cooperation with National Sunflower Association presents The High Plains No-Till Conference. Feb. 1-2. 2005. Island Grove Park, Greeley, CO. P. L1-L6.

AGGREGATE CARBON AND NITROGEN DYNAMICS DURING LABORATORY INCUBATION - (Abstract Only)

Mikha, M.M., Rice, C.W. 2004. Aggregate carbon and nitrogen dynamics during laboratory incubation. Agronomy Abstracts. Presented at the American Society of Agronomy Annual Meeting. Nov. 2-6, 2004. Denver, Colo.

CARBON AND NITROGEN MINERALIZATION AS AFFECTED BY WETTING AND DRYING CYCLES - (Peer Reviewed Journal)

Mikha, M.M., Rice, C.W., Milliken, G.A. 2005. Carbon and nitrogen mineralization as affected by wetting and drying cycles. Journal of Soil Biology and Biochemistry. v. 37:339-347.

EVALUATING THE ROTATION EFFECT IN ALTERNATIVE ROTATIONS AT AKRON, COLORADO - (Abstract Only)

Vigil, M.F., Nielsen, D.C., Henry, W.B., Benjamin, J.G., Mikha, M.M., Anderson, R.L. 2004. Evaluating the rotation effect in alternative rotations at Akron, Colorado. Agronomy Abstracts. Presented at the ASA-CSSA-SSSA 2004 Annual Meetings. Oct. 31-Nov. 4, 2004. Seattle, WA.

NITROGEN MINERALIZATION FROM A SOIL WITH DIFFERING N SUPPLY CAPACITIES - (Abstract Only)

Mikha, M.M., Rice, C.W. 2004. Nitrogen mineralization from a soil with differing N supply capacities. Agronomy Abstracts. Presented at the 2004 ASA-CSSA-SSSA International Annual Meeting. Oct. 31-Nov. 4, 2004. Seattle, WA.

CROP ROTATION AND TILLAGE EFFECTS ON SOIL HYDRAULIC PROPERTIES - (Abstract Only)

Benjamin, J.G., Nielsen, D.C., Vigil, M.F., Mikha, M.M., Henry, W.B. 2004. Crop rotation and tillage effects on soil hydraulic properties. Agronomy Abstracts. Presented at the International ASA-CSSA-SSSA Annual Meeting. Oct. 31-Nov. 4, 2004. Seattle, WA.

EFFECT OF TILLAGE AND MANURE ON SOIL AND AGGREGATE-ASSOCIATED CARBON AND NITROGEN - (Peer Reviewed Journal)

Mikha, M.M., Rice, C.W. 2004. Tillage and manure effects on soil and aggregate-associated carbon and nitrogen. Soil Science Society of America Journal. 68:809-816.

GREAT PLAINS SOIL QUALITY ASSESSMENT PROJECT: SOIL CHEMICAL PROPERTIES - (Abstract Only)

Mikha, M.M., Vigil, M.F., Liebig, M.A., Wienhold, B.J., Bowman, R.A., Mcconkey, B., Deibert, E., Pikul Jr, J.L. 2003. Great plains soil quality assessment project: soil chemical properties. Meeting Abstract. Presented at the Dynamic Cropping Systems Meeting Aug. 4-7, 2003. Bismarck, ND.

GREAT PLAINS SOIL QUALITY ASSESSMENT PROJECT: SOIL CHEMICAL PROPERTIES - (Abstract Only)

Mikha, M.M., Vigil, M.F., Liebig, M.A., Wienhold, B.J., Bowman, R.A., Mcconkey, B., Deibert, E., Pikul Jr, J.L. 2004. Great plains soil quality assessment project: soil chemical properties. Agronomy Abstracts. Presented at the Annual American Society of Agronomy Meeting (ASA), November 2003. Denver, Colo.