CURRICULUM VITAE: JOHAN SIX

Education:

PhD. 1998 Colorado State University (CSU) Soil Science

M.S. 1995 Katholieke Universiteit Leuven, Belgium Bio‑Engineering

Experience:

2002 – present Professional Researcher Department of Agronomy and Range Science, UCD

2001- present Research Scientist Natural Resource Ecology Laboratory, CSU

1999-present Affiliated Professor Department of Soil and Crop Sciences, CSU

Regular Faculty Member Graduate Degree Program in Ecology, CSU

1999-2001 Scientist Natural Resource Ecology Laboratory, CSU

1999 Research Associate Natural Resource Ecology Laboratory, CSU

1996-1998 Graduate Research Assistant Natural Resource Ecology Laboratory, CSU

1995 Lab Technician Natural Resource Ecology Laboratory, CSU

1994 Graduate Research Assistant Institute of Agricultural Science, Vietnam.

Professional Activities:

* Colorado State University representative for Task 1 – Basic processes and Mechanisms – of the Consortium for Agricultural Soils Mitigation of Greenhouse Gases (CASMGS).

* Reviewer for Advances in Environmental Research, Agronomie: Agriculture & Environment, Biogeochemistry, Canadian Journal of Soil Science, Ecological Applications, European Journal of Soil Science, Geoderma, Global Change Biology, Journal of Agronomy, Journal of Environmental Quality, Journal of Tropical Ecology, Oecologia, Plant and Soil, Soil and Tillage Research, Soil Biology and Biochemistry and Soil Science Society of American Journal.

* Reviewer for Canadian Agri-Food Research Council, Kansas NSF EPSCoR, The Rockefeller Foundation, and US National Science Foundation.

* Co-organized a Workshop titled: “The role of Light Fraction and Particulate Organic Matter in intensively Managed Systems.” LTER All Scientist Meeting, 2000. Snow Bird, Utah.

* Invited Keynote Speaker at the 11^th International Nitrogen Workshop, 2001. Reims, France and at the Advances in Soil Structure Research Workshop, 2002, Prince Edward Island, Canada.

Awards:

* Outstanding Graduate Student Award-Division S6 Soil & Water Management & Conservation, Soil Science Society of America. October 1998.

* Travel award for the symposium “Soil Respiration: Implications for Climate change” held at the 1997 Annual Soil Science Society of America Meeting.

Funded Research Proposals:

Aggregate Turnover Controls on Soil Organic Matter: The Influence of Management and Mineralogy. K. Paustian, J. Six, E.T. Elliott, and G. Kelly. National Science Foundation. Funded for $600,000. (4/00-3/03)

Microbial Contributions to Carbon Sequestration in No-tillage Agroecosystems. S.D. Frey (Ohio State University) and J. Six. United States Department of Agriculture. Funded for $200,000. (1/01-12/03)

Soil C Saturation: Determining Rates and Limits of Carbon Sequestration. J. Six, R. Conant, and K. Paustian. Department of Energy. Funded for $610,870. (10/00-9/04)

Technical support to develop and test new protocol for the physical fractionation of soils. J. Six. Argonne National Laboratory, Department of Energy. Funded for $35,018. (3/00-9/02)

An Integrated Approach to Develop Baseline Soil Carbon Content in Semiarid Eastern Oregon. R. Conant, J. Six and K. Paustian. Environmental Resources Trust. Funded for $19,953. (1/01-12/01)

Consortium for Agricultural Soils Mitigation of Greenhouse Gases (CASMGS)”. United States Department of Agriculture. Funded for $1.840.000. (03/02-02/04)

Biomass Nitrogen Conversions during Combustion. J. Six. National Renewable Energy Laboratory. Funded for $54,673. (07/02-06/04)

Publications:

Bossuyt, H., K. Denef. J. Six, S.D. Frey, R. Merckx, and K. Paustian. 2001. Influence of microbial

populations and residue quality on aggregate stability. Applied Soil Ecology, 16:195-208.

Bossuyt, H., J. Six, and P.F. Hendrix. 2002. Aggregate protected carbon in no-tillage and conventional tillage

agroecosystems using ¹⁴C labeled plant residue. Soil Sci. Soc. Am. J., In press

Denef, K., J. Six, H. Bossuyt, S.D. Frey, E.T. Elliott, R. Merckx, and K. Paustian. 2001. Influence of

wet-dry cycles on the interrelationship between aggregate, particulate organic matter, and microbial community dynamics. Soil Biol. Biochem., 33:1599-1611.

Denef, K., J. Six, R. Merckx, and K. Paustian. 2001. Importance of macroaggregate turnover in controlling carbon sequestration in soils: effect of physical disturbance induced by dry-wet cycles. Soil Biol. Biochem., 33:2145-2153.

Denef, K., J. Six, R. Merckx, and K. Paustian.2002. Short-term effects of biological and physical forces on aggregate formation in soils with different clay mineralogy. Plant and Soil, In press.

Guggenberger, G., E.T. Elliott, S.D. Frey, J. Six, and K. Paustian. 1999. Microbial contributions to the

aggregation of cultivated grassland soil amended with starch. Soil Biol. Biochem. 31:407-419.

Guggenberger, G., S.D. Frey, J. Six, E.T. Elliott, and K. Paustian. 1999. Bacterial and fungal cell-wall

residues in conventional and no-tillage agroecosystems. Soil Sci. Soc. Am. J. 63:1188-1198.

Paustian, K., J. Six, E.T. Elliott, and H.W. Hunt. 2000. Management options for reducing CO2 emissions from agricultural soils. Biogeochemistry 48:147-163.

Salas, A.M., E.T. Elliott, D.G. Westfall, J. Six, and C.V. Cole. 2003. The role of particulate organic matter in

phosphorus cycling. Soil Sci. Soc. Am. J., In press

Six, J., E.T. Elliott, K. Paustian, and J.W. Doran. 1998. Aggregation and soil organic matter storage in

cultivated and native grassland soils. Soil Sci. Soc. Am. J. 62:1367-1377.

Six, J. E.T. Elliott, and K. Paustian. 1999. Aggregate and soil organic matter dynamics under

conventional and no-tillage systems. Soil Sci. Soc. Am. J. 63:1350-1358.

Six, J., P.A. Schultz, J.D. Jastrow, and R. Merckx. 1999. Use and recycle of sodium polytungstate in soil organic matter studies. Soil Biol. Biochem. 31:1193-1196.

Six, J., K. Paustian, E.T. Elliott, and C. Combrink. 2000. Soil structure and soil organic matter: I.

Distribution of aggregate size classes and aggregate associated carbon. Soil Sci. Soc. Am. J.

64:681-689.

Six, J., E.T. Elliott, and K. Paustian. 2000. Soil structure and soil organic matter: II. A normalized

stability index and the effect of mineralogy. Soil Sci. Soc. Am. J. 64:1042-1049.

Six, J., R. Merckx, K. Kimpe, E.T. Elliott, and K. Paustian. 2000. A reevaluation of the enriched labile soil organic matter fraction. Eur. J. Soil Sci. 51:283-293.

Six, J., E.T. Elliott, and K. Paustian. 2000. Soil macroaggregate turnover and microaggregate formation: A mechanism for C sequestration under no-tillage agriculture. Soil Biol. Biochem. 32:2099-2103.

Six, J., A. Carpentier, C. van Kessel, R. Merckx, D. Harris, W.R. Horwath and A. Lüsher. 2001. Impact of elevated CO₂ on soil organic matter and aggregate dynamics as related to changes in aggregate turnover and residue quality. Plant and Soil, 234:27-36.

Six, J., Guggenberger, G., K. Paustian, L. Haumaier, E.T. Elliott, and W. Zech. 2001. Sources and

Composition of physically defined soil organic matter fractions. Eur. J. Soil Sci. 52:607-618.

Six, J. and J.D. Jastrow. 2002. Soil Organic Matter Turnover. Encyclopedia of Soil Science, Marcel Dekker, NY.

Six, J., R.T. Conant, E.A. Paul, and K. Paustian. 2002. Stabilization mechanisms of soil organic matter: Implications for C-saturation of soils. Plant and Soil 241:155-176.

Six, J., P. Callewaert, S. Lenders, S. Degryze, K. Paustian, S.J. Morris, E.G. Gregorich and

E.A. Paul. 2002. Measuring and understanding carbon storage in afforested soils by physical fractionation. Soil Sci. Soc. Am. J., In press.

Six, J., C. Feller, K. Denef, S.M. Ogle, J.C. de Moraes Sa and A. Albrecht. 2002. Organic matter, biota and aggregation in temperate and tropical soils – Effect of no-tillage. Agronomie: Agriculture & Environment, In press.