Buyanovsky, G.A., and G.H.Wagner. 1998. Carbon cycling in cultivated land and its global significance. Global Change Biology 4:131–114.

Casas, R. 2003. Sustentabilidad de la agricultura en la Región Pampeana. Institute de Suelos, Institute Nacional de Tecnología Agropecuaria, Castelar, Buenos Aires, Argentina. 14 pp.

Clark, D.A., and D.B.Clark. 1999. Assessing the growth of tropical rain forest trees: Issues for forest modeling and management. Ecological Applications 9(3):981–997.

CTIC (Conservation Technology Information Center). 2002. National Crop Residue Management Survey Conservation Tillage Data. West Lafayette, IN: Purdue University. Available online at

Currie, W.S., and K.J.Nadelhoffer. 2002. The imprint of land use history: Patterns of carbon and nitrogen in downed woody debris at the Harvard Forest. Ecosystems 5:446–460.

Davidson, E.A., and I.L.Ackerman. 1993. Changes in soil carbon inventories following cultivation of previously untilled soils. Biogeochemistry 20:161–193.

Davidson, E.A., K.Savage, P.Bolstad, D.A.Clark, P.S.Curtis, D.S.Ellsworth, P.J.Hanson, B.E.Law, Y.Luo, K.S.Pregitzer, J.C.Randolph, and D. Zak. 2002. Belowground carbon allocation in forests estimated from litterfall and IRGA-based soil respiration measurements. Agriculture and Forest Meteorology 113:39–51.

DeFries, R., C.Field, I.Fung, G.Collatz, and L.Bounoua. 1999. Combining satellite data and biogeochemical models to estimate global effects of human-induced land cover change on carbon emissions and primary productivity. Global Biogeochemical Cycles 13(3):803–815.

DeFries, R.S., R.A.Houghton, M.C.Hansen, C.B.Field, D.Skole, and J. Townshend. 2002. Carbon emissions from tropical deforestation and regrowth based on satellite observations for the 1980s and 1990s. Proceedings of the National Academy of Sciences of the USA 99(22):14256–14261.

DeLucia, E.H. 2003. Forest production under elevated carbon dioxide and temperature. Paper prepared for delivery at the National Research Council Workshop on Direct and Indirect Human Contributions to Terrestrial Greenhouse Gas Fluxes, Sept., 23–24. Washington, D.C.: The National Academies. Available online at

DeLucia, E.H., D.J.Moore, J.G.Hamilton, A.Finzi, J.Pippen, W.H. Schlesinger, and R.J.Norby. The changing role of forests in the global carbon cycle: Responses to Elevated Atmospheric CO2, Paper presented at the American Geophysical Union Fall Meeting, San Francisco, December.

The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement