Bio-char Sequestration in Terrestrial Ecosystems – A Review

Article

Abstract

The application of bio-char (charcoal or biomass-derived black carbon (C)) to soil is proposed as a novel approach to establish a significant, long-term, sink for atmospheric carbon dioxide in terrestrial ecosystems. Apart from positive effects in both reducing emissions and increasing the sequestration of greenhouse gases, the production of bio-char and its application to soil will deliver immediate benefits through improved soil fertility and increased crop production. Conversion of biomass C to bio-char C leads to sequestration of about 50% of the initial C compared to the low amounts retained after burning (3%) and biological decomposition (< 10–20% after 5–10 years), therefore yielding more stable soil C than burning or direct land application of biomass. This efficiency of C conversion of biomass to bio-char is highly dependent on the type of feedstock, but is not significantly affected by the pyrolysis temperature (within 350–500 C common for pyrolysis). Existing slash-and-burn systems cause significant degradation of soil and release of greenhouse gases and opportunies may exist to enhance this system by conversion to slash-and-char systems. Our global analysis revealed that up to 12% of the total anthropogenic C emissions by land use change (0.21 Pg C) can be off-set annually in soil, if slash-and-burn is replaced by slash-and-char. Agricultural and forestry wastes such as forest residues, mill residues, field crop residues, or urban wastes add a conservatively estimated 0.16 Pg C yr−1. Biofuel production using modern biomass can produce a bio-char by-product through pyrolysis which results in 30.6 kg C sequestration for each GJ of energy produced. Using published projections of the use of renewable fuels in the year 2100, bio-char sequestration could amount to 5.5–9.5 Pg C yr−1 if this demand for energy was met through pyrolysis, which would exceed current emissions from fossil fuels (5.4 Pg C yr−1). Bio-char soil management systems can deliver tradable C emissions reduction, and C sequestered is easily accountable, and verifiable.

Keywords

black carbon carbon sequestration charcoal emissions trading global warming potential greenhouse gas emissions soils terra preta de indio 

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References

  1. Accardi-Dey, A. and Gschwend, P.M.: 2002, ‘Assessing the combined roles of natural organic matter and black carbon as sorbents in sediments’, Environmental Science and Technology36, 21–29.CrossRefGoogle Scholar
  2. Bailis, R., Ezzati, M. and Kammen, D.M.: 2005, ‘Mortality and greenhouse gas impacts of biomass and petrolium energy futures in Africa’, Science308, 98–103.CrossRefGoogle Scholar
  3. Batjes, N.H.: 1998, ‘Mitigation of atmospheric CO2 concentrations by increased carbon sequestration in the soil’, Biology and Fertility of Soils27, 230–235.CrossRefGoogle Scholar
  4. Beaton, J.D., Peterson, H.B. and Bauer, N.: 1960, ‘Some aspects of phosphate adsorption by charcoal’, Soil Science Society of America Proceedings24, 340–346.CrossRefGoogle Scholar
  5. Berglund, L.M., DeLuca, T.H. and Zackrisson, O.: 2004, ‘Activated carbon amendments to soil alters nitrification rates in Scots pine forests’, Soil Biology and Biochemistry36, 2067–2073.CrossRefGoogle Scholar
  6. Berndes, G., Hoogwijk, M. and van den Broeck, R.: 2003, ‘The contribution of biomass in the future global energy supply: A review of 17 studies’, Biomass and Bioenergy25, 1–28.CrossRefGoogle Scholar
  7. Bird, M.I., Moyo, C., Veendaal, E.M., Lloyd, J. and Frost, P.: 1999, ‘Stability of elemental carbon in a savanna soil’, Global Biogeochemical Cycles13, 923–932.CrossRefGoogle Scholar
  8. Bridgwater, A.V., Toft, A.J. and Brammer, J.G.: 2002, ‘A techno-economic comparison of power production by biomass fast pyrolysis with gasification and combustion’, Renewable and Sustainable Energy Reviews6, 181–246.CrossRefGoogle Scholar
  9. Briggs, D.G.: 1994, Forest Products Measurements and Conversion Factors: With Special Emphasis on the U.S. Pacific Northwest, Institute of Forest Resources, Contribution 75, University of Washington: Seattle, WA.Google Scholar
  10. Brodowski, S.B.: 2004, Origin, Function, and Reactivity of Black Carbon in the Arable Soil Environment, Ph.D. Dissertation, Institute of Soil Science and Soil Geography, Bayreuth, University of Bayreuth.Google Scholar
  11. Brodowski, S., Amelung, W., Haumeier, L., Abetz, C. and Zech, W.: 2005, ‘Morphological and chemical properties of black carbon in physical soil fractions as revealed by scanning electron microscopy and energy-dispersive X-ray spectroscopy’, Geoderma, in press, DOI: 10.1016/j.geoderma.2004.12.019.Google Scholar
  12. Clifton-Brown, J.C., Stampfl, P.F. and Jones, M.B.: 2004, ‘Miscanthus biomass production for energy in Europe and its potential contribution to decreasing fossil fuel carbon emissions’, Global Change Biology10, 509–518.CrossRefGoogle Scholar
  13. Coomes, O.T. and Burt G.J.: 2001, ‘Peasant charcoal production in the Peruvian Amazon: rain forest use and economic reliance’, Forest Ecology and Management 140, 39–50.CrossRefGoogle Scholar
  14. Daud, W.M.A.W., Ali, W.S.W. and Sulaiman, M.Z.: 2001, ‘Effect of carbonization temperature on the yield and porosity of char produced from palm shell’, Journal of Chemical Technology and Biotechnology76, 1281–1285.CrossRefGoogle Scholar
  15. Day, D., Evans, R.J., Lee, J.W. and Reicosky, D.: 2005, ‘Economical CO2, SOx, and NOx capture from fossil-fuel utilization with combined renewable hydrogen production and large-scale carbon sequestration’, Energy30, 2558–2579.CrossRefGoogle Scholar
  16. Demirbas, A.: 2001, ‘Carbonization ranking of selected biomass for charcoal, liquid and gaseous products’, Energy Conversion and Management42, 1229–1238.CrossRefGoogle Scholar
  17. Demirbas, A.: 2004a, ‘Effects of temperature and particle size on bio-char yield from pyrolysis of agricultural residues’, Journal of Analytical and Applied Pyrolysis72, 243–248.CrossRefGoogle Scholar
  18. Demirbas, A.: 2004b, ‘Determination of calorific values of bio-chars and pyro-oils from pyrolysis of beech trunkbarks’, Journal of Analytical and Applied Pyrolysis72, 215–219.CrossRefGoogle Scholar
  19. DOE: 1999, Carbon Sequestration Research and Development, Reichle, D., et al. (Eds.), U.S. Department of Energy, Office of Science, Washington DC, http://www.osti.gov/energycitations/ servlets/purl/810722-9s7bTP/native/Google Scholar
  20. Erickson, C.: 2003, ‘Historical ecology and future explorations’, in J. Lehmann, D.C. Kern, B. Glaser and W.I. Woods (eds.), Amazonian Dark Earths: Origin, Properties, Management, (pp. 455–500) Dordrecht, Kluwer Academic Publishers.Google Scholar
  21. FAO: 1983, Simple Technologies for Charcoal Making, Rome, Italy, Food and Agriculture Organization of the United Nations, Forestry Paper No. 41.Google Scholar
  22. FAO: 1991, Charcoal Production and Pyrolysis Technologies, P. Thoresen (ed.), Rome, Italy, Food and Agriculture Organization of the United Nations.Google Scholar
  23. FAO: 2004, FAOSTAT Data, Rome, Italy, Food and Agriculture Organization of the United Nations, http://apps.fao.org/default.jsp.Google Scholar
  24. FFTC: 2001, Application of Rice Husk Charcoal, Taipei, FFTC Leaflet for Agriculture, No. (4).Google Scholar
  25. Fischer, G., Prieler, S. and van Velthuizen, H.: 2005, ‘Biomass potentials of miscanthus, willow and poplar: results and policy implications for Eastern Europe, Northern and Central Asia’, Biomass and Bioenergy28, 119–132.CrossRefGoogle Scholar
  26. Freibauer, A., Rounsevell, M.D.A., Smith, P. and Verhagen, J.: 2004, ‘Carbon sequestration in agricultural soils of Europe’, Geoderma122, 1–23.CrossRefGoogle Scholar
  27. Glaser, B., Balashov, E., Haumaier, L., Guggenberger, G. and Zech, W.: 2000, ‘Black carbon in density fractions of anthropogenic soils of the Brazilian Amazon region’, Organic Geochemistry31, 669–678.CrossRefGoogle Scholar
  28. Glaser, B., Haumaier, L., Guggenberger, G. and Zech, W.: 2001, ‘The Terra Preta phenomenon – A model for sustainable agriculture in the humid tropics’, Naturwissenschaften88, 37–41.CrossRefGoogle Scholar
  29. Glaser, B., Lehmann, J. and Zech, W.: 2002, ‘Ameliorating physical and chemical properties of highly weathered soils in the tropics with charcoal – A review’, Biology and Fertility of Soils35, 219–230.CrossRefGoogle Scholar
  30. Gustaffson, Ö., Haghseta, F., Chan, C., Macfarlane, J. and Gschwend, P.M.: 1997, ‘Quantification of the dilute sedimentary soot phase: Implications for the PAH speciation and bioavailability’, Environmental Science and Technology31, 203–209.CrossRefGoogle Scholar
  31. Hamer, U., Marschner, B., Brodowski, S. and Amelung, W.: 2004, ‘Interactive priming of black carbon and glucose mineralization’, Organic Geochemistry35, 823–830.CrossRefGoogle Scholar
  32. Hughes, R.F., Kauffman, J.B. and Cummings, D.L.: 2000, ‘Fire in the Brazilian Amazon: 3. Dynamics of biomass, C and nutrient pools in regenerating forests’, Oecologia124, 574–588.CrossRefGoogle Scholar
  33. IPCC: 1996, Revised 1996 IPCC Guidelines for National Greenhouse Gas Inventories, Greenhouse Gas Inventory Reference Manual Volume 3, J.T. Houghton, L.G. Meira Filho, B. Lim, K. Treanton, I. Mamaty, Y. Bonduki, D.J. Griggs and B.A. Callender (eds.), IPCC/OECD/IEA, Bracknell, UK, Meteorological Office.Google Scholar
  34. IPCC: 2000, Land Use, Land-Use Change, and Forestry, Watson, R.T., Noble, R., Bolin, B., Ravindranath, N.H., Verardo, D.J. and Dokken, D.J. (eds.), Intergovernmental Panel on Climatic Change Special Report, Cambridge, Cambridge University Press.Google Scholar
  35. IPCC: 2001, Climate Change 2001: The Scientific Basis, Technical Summary by Workgroup I of the Intergovernmental Panel on Climatic Change, Cambridge, UK, Cambridge University Press.Google Scholar
  36. Iyobe, T., Asada, T., Kawata, K. and Oikawa, K.: 2004, ‘Comparison of removal efficiencies for ammonia and amine gases between woody charcoal and activated carbon’, J. Health Sci.50, 148–153.CrossRefGoogle Scholar
  37. Izaurralde, R.C., Rosenberg, N.J. and Lal, R.: 2001, ‘Mitigation of climate change by soil carbon sequestration’, Advances in Agronomy70, 1–75.CrossRefGoogle Scholar
  38. Jenkinson, D.S. and Ayanaba, A.: 1977, ‘Decomposition of carbon-14 labeled plant material under tropical conditions’, Soil Science Society of America Journal41, 912–915.CrossRefGoogle Scholar
  39. Kamm, J.: 2004, ‘A new class of plants for a biofuel feedstock energy crop’, Applied Biochemistry and Biotechnology113–116, 55–70.CrossRefGoogle Scholar
  40. Katyal, S., Thambimuthu, K. and Valix, M.: 2003, ‘Carbonisation of bagasse in a fixed bed reactor: influence of process variables on char yield and characteristics’, Renewable Energy28, 713-725.CrossRefGoogle Scholar
  41. Kawamoto, K., Ishimaru, K. and Imamura, Y.: 2005, ‘Reactivity of wood charcoal with ozone’, Journal of Wood Science51, 66–72.CrossRefGoogle Scholar
  42. Ketterings, Q.M., Wibowo, T.T., van Noordwijk, M. and Penot E.: 1999, ‘Farmers’ perspectives on slash-and-burn as a land clearing method for small-scale rubber producers in Sepunggur, Jambi Province, Sumatra, Indonesia’, Forest Ecology and Management120, 157–169.CrossRefGoogle Scholar
  43. Kim, S., Kaplan, L.A., Benner, R. and Hatcher, P.G.: 2004, ‘Hydrogen-deficient molecules in natural riverine water samples – evidence for the existence of black carbon in DOM’, Marine Chemistry92, 225–234.CrossRefGoogle Scholar
  44. Lal, R.: 2004, ‘Agricultural activities and the global carbon cycle’, Nutrient Cycles in Agroecosystems70, 103–116.CrossRefGoogle Scholar
  45. Lee, J.W. and Li, R.: 2003, ‘Integration of coal-fired energy systems with CO2 sequestration through NH4HCO3 production’, Energy Conversion and Management44, 1535–1546.CrossRefGoogle Scholar
  46. Lehmann, J., da Silva Jr, J.P., Rondon, M., Cravo, M.S., Greenwood, J., Nehls, T., Steiner, C. and Glaser, B.: 2002, ‘Slash-and-char – a feasible alternative for soil fertility management in the central Amazon?’, Proceedings of the 17thWorld Congress of Soil Science, (pp. 1–12) Bangkok, Thailand. CD–ROM Paper no. 449.Google Scholar
  47. Lehmann, J., da Silva Jr., J.P., Steiner, C., Nehls, T., Zech, W. and Glaser, B.: 2003a, ‘Nutrient availability and leaching in an archaeological Anthrosol and a Ferralsol of the Central Amazon basin: fertilizer, manure and charcoal amendments’, Plant and Soil249, 343–357.CrossRefGoogle Scholar
  48. Lehmann, J., Kern, D.C., German, L.A., McCann, J., Martins, G.C. and Moreira, A.: 2003b, ‘Soil Fertility and Production Potential’, in J. Lehmann, D.C. Kern, B. Glaser and W.I. Woods (eds.), Amazonian Dark Earths: Origin, Properties, Management, (pp. 105–124) Dordrecht, Kluwer Academic Publishers.CrossRefGoogle Scholar
  49. Lehmann, J. and Rondon, M.: 2005, ‘Bio-char soil management on highly-weathered soils in the humid tropics’, in N. Uphoff (ed.), Biological Approaches to Sustainable Soil Systems, Boca Raton, CRC Press, in press.Google Scholar
  50. Lemus, R. and Lal, R.: 2005, ‘Bioenergy crops and carbon sequestration’, Critical Reviews in Plant Sciences24, 1–21.CrossRefGoogle Scholar
  51. Li, X., Hagaman, E., Tsouris, C. and Lee, J.W.: 2003, ‘Removal of carbon dioxide from flue gas by ammonia carbonization in the gas phase’, Energy & Fuels17, 69–74.CrossRefGoogle Scholar
  52. Liu, S., Kaire, M., Wood, E., Diallo, O. and Tieszen, L.L.: 2004, ‘Impacts of land use and climate change on carbon dynamics in south-central Senegal’, Journal of Arid Environments59, 583–604.CrossRefGoogle Scholar
  53. Malkow, T.: 2004, ‘Novel and innovative pyrolysis and gasification technologies for energy efficient and environmentally sound MSW disposal’, Waste Management24, 53–79.CrossRefGoogle Scholar
  54. Marchetti, C.: 1977, ‘Geo-engineering and CO2 problem’, Climate Change1, 59–68.CrossRefGoogle Scholar
  55. Masiello, C.A. and Druffel, E.R.M.: 1998, ‘Black carbon in deep-sea sediments’, Science280, 1911–1913.CrossRefGoogle Scholar
  56. Masiello, C.A.: 2004, ‘New directions in black carbon organic geochemistry’, Marine Chemistry92, 201–213.CrossRefGoogle Scholar
  57. Meier, D. and Faix, O.: 1999, ‘State of the art of applied fast pyrolysis of lignocellulosic materials – a review’, Bioresource Technology68, 71–77.CrossRefGoogle Scholar
  58. Mizuta, K., Matsumoto, T., Hatate, Y., Nishihara, K. and Nakanishi T.: 2004, ‘Removal of nitrate-nitrogen from drinking water using bamboo powder charcoal’, Bioresource Technology95, 255–257.CrossRefGoogle Scholar
  59. Nik-Azar, M., Hajaligol, M.R., Sohrabi, M. and Dabir, B.: 1997, ‘Mineral matter effects in rapid pyrolysis of beech wood’, Fuel Processing Technology51, 7–17.CrossRefGoogle Scholar
  60. Nishimiya, K., Hata, T. and Imamura, Y.: 1998, ‘Analyses of chemical structure of wood charcoal by X-ray photoelectron spectroscopy’, Journal of Wood Science44, 56–61.CrossRefGoogle Scholar
  61. Nonhebel, S.: 2005, ‘Renewable energy and food supply: Will there be enough land?’ Renewable and Sustainable Energy Reviews9, 191–201.CrossRefGoogle Scholar
  62. Nye, P.H. and Greenland, D.J.: 1960, The Soil under Shifting Cultivation. London, Commonwealth Bureau of Soils Technological Communication 51, 156p.Google Scholar
  63. Okimori, Y., Ogawa, M. and Takahashi, F.: 2003, ‘Potential of CO2 emission reductions by carbonizing biomass waste from industrial tree plantation in south Sumatra, Indonesia’, Mitigation andAdaptation Straegies for Global Change8, 261–280.CrossRefGoogle Scholar
  64. Oya, A. and Iu, W.G.: 2002, ‘Deodorization performance of charcoal particles loaded with orthophosphoric acid against ammonia and trimethylamine’, Carbon40, 1391–1399.CrossRefGoogle Scholar
  65. Palm, C., Alegre, J., Arevalo, L., Mutuo, P., Mosier, A., Coe, R. 2004. ‘Nitrous oxide and methane fluxes in six different land use systems in Peruvian Amazon’, Global Biogeochemical Cycles16, 1073–1082.Google Scholar
  66. Park, B.B., Yanai, R.D., Sahm, J.M., Lee, D.K. and Abrahamson, L.P.: 2005, ‘Wood ash effects on plant and soil in a willow bioenergy plantation’, Biomass and Bioenergy28, 355–365.CrossRefGoogle Scholar
  67. PCF: 2003, 2003 PCF Annual Report, Prototype Carbon Fund, The World Bank, Washington DC.Google Scholar
  68. Pessenda, L.C.R., Gouveia, S.E.M. and Aravena, R.: 2001, ‘Radiocarbon dating of total soil organic matter and humin fraction and its comparison with 14C ages of fossil charcoal’, Radiocarbon43, 595–601.CrossRefGoogle Scholar
  69. Pimentel, D., Herz, M., Glickstein, M., Zimmerman, M., Allen, R., Becker, K., Evans, J., Hussain, B., Sarsfeld, R., Grosfeld, A. and Seidel, T.: 2002, ‘Renewable energy: current and potential issues’, Bioscience52, 1111–1120.CrossRefGoogle Scholar
  70. Post, W.M. and Kwon, K.C.: 2000, ‘Soil carbon sequestration and land-use change: Processes and potential’, Global Change Biology6, 317–328.CrossRefGoogle Scholar
  71. Radovic, L.R., Moreno-Castilla, C. and Rivera-Utrilla, J.: 2001, ‘Carbon materials as adsorbents in aqueous solutions’, in L.R. Radovic (ed.), Chemistry and Physics of Carbon, (pp. 227–405) New York, Marcel Dekker.Google Scholar
  72. Rasmussen, P.E., Goulding, K., Brown, W.T., Grace, J.R., Janzen, H.H. and Korschens, M.: 1998, ‘Long-term agroecosystem experiments: Assessing agricultural sustainability and global change’, Science282, 893–896.CrossRefGoogle Scholar
  73. Raveendran, K., Ganesh, A. and Khilar, K.C.: 1995, ‘Influence of mineral matter on biomass pyrolysis characteristics’, Fuel74, 1812–1822.CrossRefGoogle Scholar
  74. Richter, D.D., Markewitz, D., Trumbore, S.E. and Wells, C.G.: 1999, ‘Rapid accumulation and turnover of soil carbon in a re-establishing forest’, Nature400, 56–58.CrossRefGoogle Scholar
  75. Rondon, M., Lehmann, J., Ramirez, J. and Hurtado, M.P.: 2004, ‘Biologial nitrogen fixation by common beans (Phaseoulus vulgaris) increases with charcoal additions to soils’, in Integrated Soil Fertility Management in the Tropics, (pp. 58–60) 2004 Annual Report of the TSBF Institute, CIAT, Cali, Colombia.Google Scholar
  76. Rondon, M., Ramirez, J.A. and Lehmann, J.: 2005, ‘Charcoal additions reduce net emissions of greenhouse gases to the atmosphere’, in Proceedings of the 3{rd} USDA Symposium on Greenhouse Gases and Carbon Sequestration, Baltimore, USA, March 21–24 2005, p. 208.Google Scholar
  77. Rumpel, C., Alexis, M., Chabbi, A., Chaplot, V., Rasse, D.P., Valentin, C. and Mariott, A.: 2005, ‘Black carbon contribution to soil organic matter decomposition in tropical sloping land under slash-and-burn agriculture’, Geoderma, in press, DOI: 10.1016/j.geoderma.2005.01.007.Google Scholar
  78. Saito, M. and Marumoto. T.: 2002, ‘Inoculation with arbuscular mycorrhizal fungi: The status quo in Japan and the future prospects’, Plant and Soil244, 273–279.CrossRefGoogle Scholar
  79. Schlesinger, W.H. and Lichter, J.: 1999, ‘Limited carbon storage in soil and litter of experimental forest plots under incerased atmospheric CO2’, Nature411, 466–469.CrossRefGoogle Scholar
  80. Schlesinger, W.H.: 1990, ‘Evidence from chronosequence studies for a low carbon storage potential of soils’, Nature348, 232–234.CrossRefGoogle Scholar
  81. Schlesinger, W.H.: 1999, ‘Carbon and agriculture – Carbon sequestration in soils’, Science284, 2095.CrossRefGoogle Scholar
  82. Schmidt, M.W.I. and Noack, A.G.: 2000, ‘Black carbon in soils and sediments: Analysis, distribution, implications, and current challenges’, Global Biogeochemical Cycles14, 777–794.CrossRefGoogle Scholar
  83. Scholes, R.J. and Noble, I.R.: 2001, ‘Climate change – storing carbon on land’, Science294, 1012–1013.CrossRefGoogle Scholar
  84. Seifritz, W.: 1993, ‘Should we store carbon in charcoal?’, International Journal of Hydrogen Energy18, 405–407.CrossRefGoogle Scholar
  85. Sensöz, S. and Can, M.: 2002, ‘Pyrolysis of pine (Pinus bruta Ten.) chips: 1. effects of pyrolysis temperature and heating rate on the product yields’, Energy Sources24, 347–354.CrossRefGoogle Scholar
  86. Shindo, H.: 1991, ‘Elementary composition, humus composition, and decomposition in soil of charred grassland plants’, Soil Science and Plant Nutrition37, 651–657.CrossRefGoogle Scholar
  87. Shinogi, Y., Yoshida, H., Koizumi, T., Yamaoka, M. and Saito, T.: 2003, ‘Basic characteristics of low-temperature carbon products from waste sludge’, Advances in Environmental Research7, 661–665.CrossRefGoogle Scholar
  88. Shneour, E.A.: 1966, ‘Oxidation of graphite carbon in certain soils’, Science151, 991–992.CrossRefGoogle Scholar
  89. Skjemstad, J.O., Reicosky, D.C., Wilts, A.R. and McGowan, J.A.: 2002, ‘Charcoal carbon in U.S. agricultural soils’, Soil Science Society of America Journal66, 1249–1255.CrossRefGoogle Scholar
  90. Smith, P., Goulding, K.W.T., Smith K.A., Powlson D.S., Smith J.U., Falloon P. and Coleman K.: 2001. ‘Enhancing the carbon sink in European agricultural soils: including trace gas fluxes in estimates of carbon mitigation potential’, Nutrient Cycling in Agroecosystems60, 237–252.CrossRefGoogle Scholar
  91. Sombroek, W., Nachtergaele, F.O. and Hebel, A.: 1993, ‘Amounts, dynamics and sequestering of carbon in tropical and subtropical soils’, Ambio22, 417–426.Google Scholar
  92. Sombroek, W., Ruivo, M.L., Fearnside, P.M., Glaser, B. and Lehmann J.: 2003, ‘Amazonian Dark Earths as carbon stores and sinks’, in J. Lehmann, D.C. Kern, B. Glaser and W.I. Woods (eds.), Amazonian Dark Earths: Origin, Properties, Management, (pp. 125–139) Dordrecht, Kluwer Academic Publishers.Google Scholar
  93. UN/ECE: 1995, Agricultural Statistics; Handbook; Geneva, Switzerland, United Nations Economic Commission for Europe.Google Scholar
  94. UNDP: 2004, World Energy Assessment; ed. J. Goldemberg and T. B. Johansson, New York, NY, UNDP.Google Scholar
  95. US Interagency Task Force on Tropical Forests: 1980, The World's Tropical Forests: A Policy, Strategy and Program for the United States, Dept. of State Publ. 9117: Washington, DC.Google Scholar
  96. Volk, T.A., Verwijst, T., Tharakan, P.J., Abrahamson, L.P. and White, E.H.: 2004, ‘Growing fuel: A sustainability assessment of willow biomass crops’, Frontiers in Ecology and the Environment2, 411–418.CrossRefGoogle Scholar
  97. Walsh, M.E., Perlack, R.L., Turhollow, A., Ugarte, D.T., Becker, D.A., Graham, R.L., Slinksy, S.E. and Ray, D.E.: 1999, Biomass Feedstock Availability in the United States: 1999 State Level Analysis, Oak Ridge National Laboratory: Oak Ridge, TN.Google Scholar
  98. Weisbach, C., Tiessen, H. and Jimenez-Osornio, J.J.: 2002, ‘Soil fertility during shifting cultivation in the tropical Karst soils of Yucatan’, Agronomie22, 253–263.CrossRefGoogle Scholar
  99. West, T.O. and Marland, G.: 2002, ‘A synthesis of carbon sequestration, carbon emissions, and net carbon flux in agriculture: comparing tillage practices in the United States’, Agriculture, Ecosystems and Environment91, 217–232.CrossRefGoogle Scholar
  100. Yaman, S.: 2004, ‘Pyrolysis of biomass to produce fuels and chemical feedstocks’, Energy Conversion and Management45, 651–671.CrossRefGoogle Scholar
  101. Zabaniotou, A.A.: 1999, ‘Pyrolysis of forestry biomass by-products in Greece’, Energy Sources21, 395–403.CrossRefGoogle Scholar
  102. Zanzi, R., Sjöström, K. and Björnbom, E.: 2002, ‘Rapid pyrolysis of agricultural residues at high temperature’, Biomass and Bioenergy23, 357–366.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  1. 1.Department of Crop and Soil SciencesCollege of Agriculture and Life Sciences, Cornell UniversityIthacaUSA
  2. 2.GY Associates Ltd.HarpendenUK
  3. 3.Climate Change ProgramCentro Internacional de Agricultura Tropical (CIAT)CaliColombia

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