All Publications

Cleland, E. E., C. Clark, S. Collins, J. Fargione, L. Gough, K. L. Gross, D. G. Milchunas, S. Pennings, W. D. Bowman, I. C. Burke, W. K. Lauenroth, G. P. Robertson, J. Simpson, D. Tilman, and K. N. Suding. 2008. Species responses to nitrogen fertilization in herbaceous plant communities and associated species traits (Data paper). Ecology 89: 1175. [PDF]

Robertson, G. P. 2008. Long-term ecological research: Re-inventing network science. Frontiers in Ecology and the Environment 6: 281. [PDF]

Robertson, G. P., V. H. Dale, O. C. Doering, S. P. Hamburg, J. M. Melillo, M. M. Wander, W. J. parton, P. R. Adler, J. N. Barney, R. M. Cruse, C. S. duke, P. M. Fearnside, R. F. Follett, H. K. Gibbs, J. Goldemberg, D. J. Miadenoff, D. Ojima, M. W. Palmer, A. Sharpley, L. Wallace, K. C. Weathers, J. A. Wiens, and W. W. Wilhelm. 2008. Sustainable biofuels redux. Science 322: 49. [PDF]

Smith, R. G., C. P. McSwiney, A. S. Grandy, P. Suwanwaree, R. M. Snider, and G. P. Robertson. 2008. Diversity and abundance of earthworms across an agricultural land-use intensity gradient. Soil & Tillage Research 100: 83-88. [PDF]

Robertson, G. P., V. G. Allen, G. Boody, E. R. Boose, N. G. Creamer, L. E. Drinkwater, J. R. Gosz, L. Lynch, J. L. Havlin, L. E. Jackson, S. T. A. Pickett, L. Pitelka, A. Randall, A. S. Reed, T. R. Seastedt, R. B. Waide, and D. H. Wall. 2008. Long-term agricultural research: A research education, and extension imperative. BioScience 58: 640-643. [PDF]

Horvath, B. J., A. N. Kravchenko, G. P. Robertson, and J. M. Vargas, Jr. 2007. Geostatistical analysis of dollar spot epidemics occurring on a mixed sward of creeping bentgrass and annual bluegrass. Crop Science 47:1206-1216.[PDF]

Swinton, S. M., F. Lupi, G. P. Robertson, and S. K. Hamilton. 2007. Ecosystem services and agirculture: cultivating agriculture ecosystems for diverse benefits. Ecological Economics 64: 245-252. [PDF]

Smith, R. G., F. D. Menalled, and G. P. Robertson. 2007. Temporal yield variability under conventional and alternative management systems. Agronomy Journal 99: 1629-1634. [PDF]

Robertson, G. P., L. W. Burger, C. L. Kling, R. Lowrance, and D. J. Mulla. 2007. New approaches to environmental management research at landscape and watershed scales. Pages 27-50 in M. Schnepf and C. Cox, eds. Managing Agricultural Landscapes for Environmental Quality. Soil and Water Conservation Society, Ankeny, Iowa, USA.

Kravchenko, A. N., and G. P. Robertson. 2007. Can topographical and yield data substantially improve total soil carbon mapping by regression kriging? Agronomy Journal 99: 12-17. [PDF]

Grandy, A. S., and G. P. Robertson. 2007. Land use intensity effects on soil C accumulation rates and mechanisms. Ecosystems 10: 59-74. [PDF]

Hamilton, S. K., A. L. Kurzman, C. Arango, L. Jin, and G. P. Robertson. 2007. Evidenced for carbon sequestration by agricultural liming. Global Biogeochem. Cycles 21: GB2021, doi:10.1029/2006GB002738.

Ostrom, N. E., A. J. Pitt, R. L. Sutka, P. H. Ostrom, A. S. Grandy, K. H. Huizinga, and G. P. Robertson. 2007. Isotopologue effects during N2O reduction in soils and in pure cultures of denitrifiers. Journal of Geophysical Research 112: doi.10.1029/2006JG00287. [PDF]

Robertson, G. P., and P. Groffman. 2007. Nitrogen transformations. Pages 341-364 in E. A. Paul ed. Soil Microbiology, Biochemistry, and Ecology. Springer, New York, New York, USA. [PDF]

Ambus, P., and G. P. Robertson. 2006. The effect of increased N deposition on nitrous oxide, methane, and carbon dioxide fluxes from unmanaged forest and grassland communities in Michigan. Biogeochemistry 79: 315-337. [PDF]

Grace, P. R., J. N. Ladd, G. P. Robertson, and S. H. Gage. 2006. SOCRATES - A simple model for predicting long-term changes in soil organic carbon in terrestrial ecosystems. Soil Biology and Biochemistry 38: 1172-1176. [PDF]

Grace, P. R., M. Colunga-Garcia, S. H. Gage, G. P. Robertson, and G. R. Safir. 2006. The potential impact of agricultural management and climate change on soil organic carbon resources in terrestrial ecosystems of the North Central Region of the United States. Ecosystems 9: 816-827. [PDF]

Grandy, A. S. and G. P. Robertson. 2006. Cultivation of a temperate-region soil at maximum carbon equilibrium immediately accelerates aggregate turnover and CO2 and N2O emissions. Global Change Biology 12: 1507-1520. [PDF]

Grandy, A. S., T. D. Loecke, S. Parr, and G. P. Robertson. 2006. Long-term trends in nitrous oxide emissions, soil nitrogen, and crop yields of till and no-till cropping systems. Journal of Environmental Quality 35: 1487-1495. [PDF]

Grandy, A. S., G. P. Robertson, and K. D. Thelen. 2006. Do productivity and environmental tradeoffs justify periodically cultivating no-till cropping systems? Agronomy Journal 98: 1377-1383. [PDF]

Grandy, A. S., and G. P. Robertson. 2006. Aggregation and organic matter protection following tillage of a previously uncultivated soil. Soil Science Society of America Journal 70: 1398-1406. [PDF]

Kravchenko, A. N., G. P. Robertson, X. Hao, and D. G. Bullock. 2006. Management practice effects on surface total carbon: Difference in spatial variability patterns. Agronomy Journal 98: 1559-1568. PDF [PDF]

Kravchenko, A. N., G. P. Robertson, S. S. Snapp, and A. J. M. Smucker. 2006. Using information about spatial variability to improve estimates of total soil carbon. Agronomy Journal 98: 823-829. [PDF]

Robertson, G. P., and A. S. Grandy. 2006. Soil system management in temperate regions. Pages 27-39 in N. Uphoff, A. S. Ball, E. Fernandes, H. Herren, O. Husson, M. Laing, C. Palm, J. Pretty, P. Sanchez, N. Snanginga, and J. Thies, eds. Biological Approaches to Sustainable Soil Systems. CRC Press, Taylor and Francis Group, Boca Raton, Florida, USA.

Swinton, S. M., F. Lupi, G. P. Robertson, and D. A. Landis. 2006. Ecosystem services from agriculture: Looking beyond the usual suspects. American Journal of Agricultural Economics 88: 1160-1166. [PDF]

Suwanwaree, P., and G.P. Robertson. 2005. Methane oxidation in forest, successional, and no-till agricultural ecosysttems: Effects of nitrogen and soil disturbance.  Soil Society of America Journal 69: 1722-1729. [PDF]

McSwiney, C. P., and G. P. Robertson. 2005. Non-linear response of N₂O flux to incremental fertilizer addition in a continuous maize (Zea mays sp.) cropping system. Global Change Biology 11: 1712-1719. [PDF]

Mosier, A. R., A. D. Halvorson, G. A. Peterson, G. P. Robertson, and L. Sherrod. 2005. Measurement of net global warming potential in three agroecosystems. Nutrient Cycling in Agroecosystems 7: 67-76. [PDF]

Robertson, G. P., and S. M. Swinton. 2005. Reconciling agricultural productivity and environmental integrity: A grand challenge for agriculture. Frontiers in Ecology and the Environment 3: 38-46. [PDF]

Morris, S. J., and G. P. Robertson. 2005. Linking function between scales of resolution. Pages 13-26 in J. Dighton, P. V. Oudemans, and J. F. White, eds. The Fungal Community, 3rd Ed. Marcel Dekker, New York, New York, USA. [PDF]

Kosola, K. R., D. M. Durall, G. P. Robertson, D. I. Dickmann, D. Parry, C. A. Russell, and E. A. Paul. 2005. Resilience of mycorrhizal fungi on defoliated and fertilized hybrid poplars. Canadian Journal of Botany 82: 671-680. [PDF]

Kravchenko, A. N., G. P. Robertson, K. D. Thelen, and R. R. Harwood. 2005. Management, topographical, and weather effects on spatial variability of crop grain yields. Agronomy Journal 97: 514-523. [PDF]

Sanchez, J. E., R. R. Harwood, T. C. Willson, K. Kizilkaya, J. Smeenk, E. Parker, E. A. Paul, B. D. Knezek, and G. P. Robertson. 2004. Integrated agricultural systems: Managing soil carbon and nitrogen for productivity and environmental quality. Agronomy Journal 96: 769-775. [PDF]

Caldeira, K., M. G. Morgan, D. Baldocchi, P. G. Brewer, C. T. A. Chen, G.-J. Nabuurs, N. Nakicenovic, and G. P. Robertson. 2004. A portfolio of carbon management options. Pages 103-103 in C. B. Field and M. R. Raupach, eds. The Global Carbon Cycle. Island Press, Washington, DC, USA. [PDF]

Russell, C. A., K. R. Kosola, E. A. Paul, and G. P. Robertson. 2004. Nitrogen cycling in poplar stands defoliated by insects. Biogeochemistry 68:365-381. [PDF]

Robertson, G. P. 2004. Abatement of nitrous oxide, methane, and the other non-CO₂ greenhouse gases: The need for a systems approach. Pages 493-506 in C. B. Field and M. R. Raupach, eds. The Global Carbon Cycle. Island Press, Washington, DC, USA. [PDF]

Robertson, G. P., J. C. Broome, E. A. Chornesky, J. R. Frankenberger, P. Johnson, M. Lipson, J. A. Miranowski, E. D. Owens, D. Pimentel, and L. A. Thrupp. 2004. Rethinking the vision for environmental research in U.S. agriculture. BioScience 54: 61-65. [PDF]

Robertson, G. P., and P. R. Grace. 2004. Greenhouse gas fluxes in tropical and temperate agriculture: The need for a full-cost accounting of global warming potentials. Environment, Development and Sustainability 6: 51-63. [PDF]

Dalal, R. C., W. Wang, G. P. Robertson, W. J. Parton, C. M. Myer, and R. J. Raison. 2003. Emission Sources of Nitrous Oxide from Australian Agricultural and Forest Lands and Mitigation Options, National Carbon Accounting System, Technical Report No. 35. Australian Greenhouse Office, Australian Government, Canberra, Australia. [PDF]

Dazzo, F. B., A. R. Joseph, A. Gomaa, Y. G. Yanni, and G. P. Robertson. 2003. Quantitative indices for the autecological biogeography of a rhizobium endophyte of rice at macro and micro spatial scales. Symbiosis 35:147-158. [PDF]

Fortuna, A. M., R. R. Harwood, G. P. Robertson, J. W. Fisk, and E. A. Paul. 2003. Seasonal changes in nitrification potential under sustainable management systems. Agriculture, Ecosystems and the Environment 97: 285-293. [PDF]

Grace, P. R., M. C. Jain, L. W. Harrington, and G. P. Robertson. 2003. Long-term sustainability of the tropical and subtropical rice and wheat system: An environmental perspective. Pages 27-43 in J. K. Ladha, J. E. Hill, J. M. Duxbury, R. K. Gupta, and R. J. Buresh, eds. Improving the Productivity and Sustainability of Rice-Wheat System: Issues and Impacts. American Society of Agronomy Special Publication 65, Madison, Wisconsin, USA. [PDF]

Bergsma, T.T., G. P. Robertson, and N. E. Ostrom. 2002. Influence of soil moisture and land use history on denitrification end-products. Journal of Environmental Quality 31: 711-717. [PDF]

Ostrom, N. E., L. O. Hedin, J. C. von Fischer, and G. P. Robertson. 2002. Nitrogen transformations and NO₃- removal at a soil-stream interface: a stable isotope approach. Ecological Applications 12:1027-1043. [PDF]

Bergsma, T. T., N. E. Ostrom, M. Emmons, and G. P. Robertson. 2001. Measuring simultaneous fluxes from soil of N₂O and N₂ in the field using the 15N-Gas "Nonequilibrium" technique. Environmental Science and Technology 35: 4307-4312. [PDF]

Robertson, G. P., and R. R. Harwood. 2001. Sustainable agriculture. Pages 99-108 in S. A. Levin, ed. Encyclopedia of Biodiversity. Academic Press, New York. [PDF]

Cavigelli, M. A., and G. P. Robertson. 2001. Role of denitrifier diversity in rates of nitrous oxide consumption in a terrestrial ecosystem. Soil Biology and Biochemistry 33:297-310. [PDF]

Daroub, S., B. G. Ellis, and G. P. Robertson. 2001. Effect of cropping and low-chemical input systems on soil phosphorus fractions. Soil Science 166: 281-291. [PDF]

Ambus, P., E. S. Jensen, and G. P. Robertson. 2001. Nitrous oxide and N-leaching losses from agricultural soil: influence of crop residue particle size, quality and placement. Phyton (Austria) 41: 7-15. [PDF]

Robertson, G. P., P. J. Barry, F. F. Busta, R. J. Collier, N. T. Keen, R. R. Sederoff, W. W. Simpkins, F. Stormshak, and T. N. Urban. 2001. Moribund funding in agricultural research (Letter). Science 291: 2089-2090. [PDF]

Robertson, G. P., E. A. Paul, and R. R. Harwood. 2000. Greenhouse gases in intensive agriculture: Contributions of individual gases to the radiative forcing of the atmosphere. Science 289:1922-1925. [PDF]

Stoyan, H., H. De-Polli, S. Bohm, G. P. Robertson, and E. A. Paul. 2000. Spatial variability of soil respiration and related soil properties at the plant scale. Plant and Soil 222: 203-214. [PDF]

Robertson, G. P., and E. A. Paul. 2000. Decomposition and soil organic matter dynamics. Pages 104-116 in E. S. Osvaldo, R. B. Jackson, H. A. Mooney, and R. W. Howarth, eds. Methods in Ecosystem Science. Springer Verlag, New York, New York, USA. [PDF]

Cavigelli, M. A., and G. P. Robertson. 2000. The functional significance of denitrifier community composition in a terrestrial ecosystem. Ecology 81:1402-1414. [PDF]

Robertson, G. P. Denitrification. 2000. In M.E. Sumner et al., eds. Handbook of Soil Science. CRC Press, Boca Raton, FL. [PDF]

Robertson, G. P., C. S. Bledsoe, D. C. Coleman, and P. Sollins, eds. 1999. Standard Soil Methods for Long-Term Ecological Research. Oxford University Press, New York.

Robertson, G. P., P. Sollins, B. G. Ellis, and K. Lajtha. 1999. Exchangeable ions, pH, and cation exchange capacity. Pages 106-114 in G. P. Robertson, C. S. Bledsoe, D. C. Coleman, and P. Sollins, eds. Standard Soil Methods for Long-Term Ecological Research. Oxford University Press, New York. [PDF]

Robertson, G. P., J. M. Blair, P. M. Groffman, D. Harris, E. Holland, K. Nadelhoffer, and D. Wedin. 1999. Soil carbon and nitrogen availability: nitrogen mineralization, nitrification, and soil respiration potentials. Pages 258-271 in G. P. Robertson, C. S. Bledsoe, D. C. Coleman, and P. Sollins, eds. Standard Soil Methods for Long-Term Ecological Research. Oxford University Press, New York. [PDF]

Paul, E. A., D. Harris, H. P. Collins, U. Schulthess, and G. P. Robertson. 1999. Evolution of CO₂ and soil carbon dynamics in biologically managed, row-crop agroecosystems. Applied Soil Ecology 11: 53-65. [PDF]

Robertson, G. P. 1999. Keeping track of carbon (Letter). Science 285: 1849. [PDF]

Holland, E. A., G. P. Robertson, J. Greenberg, P. Groffman, R. Boone, and J. Gosz. 1999. Soil CO₂, N₂O, and CH₄ Exchange. Pages 185-201 in G. P. Robertson, C. S. Bledsoe, D. C. Coleman, and P. Sollins, eds. Standard Soil Methods for Long-Term Ecological Research. Oxford University Press, New York. [PDF]

Groffman, P. M., E. A. Holland, D. D. Myrold, G. P. Robertson, and X. Zou. 1999. Denitrification. Pages 272-290 in G. P. Robertson, C. S. Bledsoe, D. C. Coleman, and P. Sollins, eds. Standard Soil Methods for Long-Term Ecological Research. Oxford University Press, New York. [PDF]

Bergsma, T. T., Q.C. Bergsma, N.E. Ostrom, and G. P. Robertson. 1999. A heuristic model for the calculation of dinitrogen and nitrous oxide flux from 15N-labeled soil. Soil Science Society of America Journal 63:1709-1716. [PDF]

Ambus, P., and G. P. Robertson. 1999. Fluxes of CH₄ and N₂O from Aspen stands grown under ambient and twice-ambient CO₂. Plant and Soil 209:1-8. [PDF]

Robertson, G. P. 1998. Row crops as ecosystems. Pages 1-16 in M. A. Cavigelli, S. Deming, L. K. Probyn, and R. R. Harwood, eds. Michigan Field Crop Ecology: Managing Biological Processes for Productivity and Environmental Quality. Michigan Agricultural Experiment Station Bulletin, Michigan State University, East Lansing, Michigan, USA. [PDF]

Robertson, G. P., D. A. Wedin, P. M. Groffman, J. M. Blair, E. Holland, D. Harris, and K. Nadelhoffer. 1999. Soil carbon and nitrogen availability: nitrogen mineralization, nitrification, and soil respiration potentials. Pages 258-271 in G. P. Robertson, C. S. Bledsoe, D. C. Coleman, and P. Sollins, eds. Standard Soil Methods for Long-Term Ecological Research. Oxford University Press, New York. [PDF]

Robertson, G. P. and E.A. Paul. 1998. Ecological research in agricultural ecosystems: contributions to ecosystem science and to the management of agronomic resources. Pages 142-164 in P.M. Groffman and M.L. Pace (eds) Successes, Limitations and Frontiers in Ecosystem Science, Cary Conference VII, Springer-Verlag, NY. [PDF]

Ambus, P. and G. P. Robertson. 1998. Automated near-continuous measurement of CO₂ and N₂O fluxes with a photoacoustic infra-red spectrometer and flow-through soil cover boxes. Soil Science Society of America Journal 62:394-400. [PDF]

Hedin, L. O., J. C. von Fischer, N. E. Ostrom, B.P. Kennedy, M. G. Brown, and G. P. Robertson. 1998. Thermodynamic and hydrologic controls on the biogeochemical structure of riparian soil-steam interfaces. Ecology 79:684-703. [PDF]

Ostrom, N. E., K. E. Knoke, L. O. Hedin, G. P. Robertson, and A. J. M. Smucker. 1998. Temporal trends in nitrogen isotope values of nitrate leaching from an agricultural soil. Chemical Geology 146: 219-227. [PDF]

Martinelli, L. A., M. C. Piccolo, A. R. Townsend, P. M. Vitousek, E. Cuevas, W. McDowell, G. P. Robertson, O. C. Santos, and K. Treseder. 1999. Nitrogen stable isotopic composition of leaves and soil: tropical versus temperate forests. Pages 45-65 in A. R. Townsend, ed. New Perspectives on Nitrogen Cycling in the Temperate and Tropical Americas. Kluwer Academic Press, Dordrecht, The Netherlands.

Robertson, G.P., K.M. Klingensmith, M.J. Klug, E.A. Paul, J.R. Crum, and B.G. Ellis. 1997. Soil resources, microbial activity, and plant productivity across an agricultural ecosystem. Ecological Applications, 7:158-170. [PDF]

Robertson, G.P. 1997. Nitrogen use efficiency in row crop agriculture: crop nitrogen use and soil nitrogen loss. Pages 347-365 in L. Jackson, ed. Ecology in Agriculture, Academic Press, NY. [PDF]

Robertson, G.P. and D.W. Freckman. 1995. The spatial distribution of nematode trophic groups across a cultivated ecosystem. Ecology 76:1425-1432. [PDF]

Paustian, K., G. P. Robertson, and E. T. Elliott. 1995. Management impacts on carbon storage and gas fluxes (CO₂, CH₄) in mid-latitude cropland and grassland ecosystems. Advances in Soil Science 27:69-84. [PDF]

Cavigelli, M.A., G.P. Robertson, and M.J. Klug. 1995. Fatty acid methyl ester (FAME) profiles as measures of soil community structure. Plant and Soil 170:99-113. [PDF]

Collins, H.A., G.P. Robertson, and M.J. Klug, eds. 1995. The Significance and Regulation of Soil Biopdiversity.  Kluwer Academic Press, Dordrecht, The Netherlands.

Robertson, G.P. 1994. The impact of soil and crop management practices on soil spatial heterogeneity. Pages 156-161 in C.E. Pankhurst, B.M. Doube, V.V.S.R. Gupta, and P.R. Grace, eds. Soil Biota Management in Sustainable Farming Systems, CSIRO Press, Melbourne, Australia.

Robertson, G.P. and K.L. Gross. 1994. Assessing the heterogeneity of below ground resources: quantifying pattern and scale. Pages 237-253 In M.M. Caldwell and R. Pearcy, eds. Plant Exploitation of Environmental Heterogeneity. Academic Press, New York.

Smith, K.A., G.P. Robertson, and J.M. Melillo. 1994. Trace gas exchange between the terrestrial biosphere and the atmosphere in the midlatitudes. pp. 179-204 in R.G. Prinn, ed. Global Atmospheric-Biospheric Chemistry. Plenum Press, NY.

Robertson, G.P. 1993. Fluxes of nitrous oxide and other nitrogen trace gases from intensively managed landscapes: a global perspective. Pages 95-108 in L.A. Harper, A.R. Mosier, J.M. Duxbury, and D.E. Rolston. eds. Agricultural Ecosystem Effects on Trace Gases and Global Climate Change. American Society of Agronomy, Madison, Wisconsin, USA.

Robertson, G.P., J.R. Crum, and B.G. Ellis. 1993. The spatial variability of soil resources following long-term disturbance. Oecologia 96:451-456.

Henrot, J. and G.P. Robertson. 1993. Vegetation removal in two soils of the humid tropics: effect on microbial biomass. Soil Biology and Biochemistry 26:111-116.

Schimel, J.P., G.P. Robertson, and others. 1992. Impacts of trace gas fluxes in mid-latitude ecosystems. Ecol. Bull. (Stockholm) 42:124-132.

Robertson, G.P. 1989. Nitrification and denitrification in humid tropical ecosystems. Pages 55-70 in J. Proctor, ed. Mineral Nutrients in Tropical Forest and Savanna Ecosystems. Blackwell Scientific, Cambridge, Massachusetts, USA.

Robertson, G.P., M.O. Andreae, H.G. Bingemer, P.J. Crutzen, R.A. Delmas, J.H. Duyzer, I. Fung, R.C. Harriss, M. Kanakidou, M. Keller, J.M. Melillo, and G.A. Zavarzin. 1989. Trace gas exchange and the physical and chemical climate: critical interactions. In M.O. Andreae and D.S. Schimel, eds. Trace Gas Exchange between Terrestrial Ecosystems and the Atmosphere. John Wiley, Berlin.

Palm, C., G. P. Robertson, and P. M. Vitousek. 1989. Nitrogen availability. Pages 162-168 in J. M. Anderson and J. S. I. Ingram, eds. Tropical Soil Biology and Fertility: A Handbook of Methods. CAB International, Wallingford, UK.

Paul, E.A. and G.P. Robertson. 1989. Ecology and the agricultural sciences: a false dichotomy? Ecology 70:1594-1596.

Robertson, G.P., M.A. Huston, F.C. Evans and J.M. Tiedje. 1988. Spatial variability in a successional plant community: patterns of nitrogen availability. Ecology 69:1517-1524.

Robertson, G.P. and J.M. Tiedje. 1988. Denitrification in a humid tropical rainforest. Nature 336:756-759.

Sollins, P., G.P. Robertson, and G. Uehara. 1988. Nutrient mobility in variable- and permanent-charge soils. Biogeochemistry 6:181-199.

Groffman, P.M., J.M. Tiedje, G.P. Robertson and S. Christensen. 1988. Denitrification at different temporal and geographic scales: proximal and distal controls. pp. 174-192. In J.R. Wilson, ed. Advances in N Cycling in Agricultural Ecosystems. Comm. Agric. Bur. International, Wallingford, U.K.

Robertson, G.P., P.M. Vitousek, P.A. Matson and J.M. Tiedje. 1987. Denitrification in a clear cut loblolly pine plantation in the Southeastern U.S.: differences related to harvest intensity, site preparation, and cultivation practice. Plant and Soil 97:119-129.

Robertson, G.P. and J.M. Tiedje. 1987. Nitrous oxide sources in aerobic soils: nitrification, denitrification, and other biological processes. Soil Biology and Biochemistry 19:187-193.

Robertson, G.P. 1987. Geostatistics in ecology: interpolating with known variance. Ecology 68:744-748.

Matson, P.A., P.M. Vitousek, J.J. Ewel, M.J. Mazzarino and G.P. Robertson. 1987. Nitrogen cycling following land clearing in a premontane wet tropical forest near Turrialba, Costa Rica. Ecology 68:491-502.

Robertson, G.P. and T. Rosswall. 1986. Nitrogen in West Africa: the regional cycle. Ecological Monographs 56:43-72.

Robertson, G.P. 1986. Regional contributions to the global nitrogen cycle. Environment 28:16-29.

Robertson, G.P. and J.M. Tiedje. 1985. An automated method for sampling the contents of stoppered gas collection vials. Plant and Soil 83:453-457.

Robertson, G.P. 1984. Nitrification and nitrogen mineralization in a lowland rainforest succession in Costa Rica, Central America. Oecologia 61:99-104.

Robertson, G.P. and J.M. Tiedje. 1984. Denitrification and nitrous oxide production in successional and old growth Michigan forests. Soil Science Society of America Journal 48:383-389.

Robertson, G.P. 1982. Factors regulating nitrification in primary and secondary succession. Ecology 63:1561-1573.

Robertson, G.P. 1982. Nitrification in forested ecosystems. Phil. Trans. Roy. Soc. Lond. B 296:445-457.

Robertson, G.P., R. Herrera and T. Rosswall (eds). 1982. Nitrogen Cycling in Ecosystems of Latin America and the Caribbean. Developments in Plant and Soil Sciences, Vol. 6. Martinus Nijhoff/D. W. Junk, The Hague. Also published as Plant & Soil 67:1-430.

Robertson, G.P. 1982. Regional nitrogen budgets: approaches and problems. Plant & Soil 67:73-80.

Robertson, G.P. and P.M. Vitousek. 1981. Nitrification in the course of ecological succession. BioScience 31:141-144.

Robertson, G.P. and P.M. Vitousek. 1981. Nitrification in primary and secondary succession. Ecology 62:376-386.