Ali, M. B., and McBride, W. D., 1990, Soybeans: state level production costs, characteristics, and input use, 1990: Economic Research Service. Stock no. ERS SB873, 48 p.

Arkenol, 2004, Our technology: concentrated acid hydrolysis. http://www.arkenol.com/Arkenol%20Inc/tech01.html (8/2/04).

Batty, J. C., and Keller, J., 1980, Energy requirements for irrigation, in Pimentel, D., ed., Handbook of Energy Utilization in Ágriculture: CRC Press, Boca Raton, FL, p. 35–44.

Blais, J. F., Maouny, K., Nlombi, K., Sasseville, J. L., and Letourneau, M., 1995, Les mesures deficacite energetique dans le secteur de leau, in Sassville, J. L., and Balis J. F. eds., Les Mesures deficacite Energetique pour Lepuration des eaux Usees Municipales: Scientific Rept. 405, Vol. 3, INRS-Eau, Quebec.

Blamey, F. P. C., Zollinger, R. K., and Schneiter, A. A., 1997, Sunflower production and culture, in Schneiter, A. A., ed., Sunflower Technology and Production: Am. Soc. Agronomy, Madison, WI, p. 595–670.

Brees, M., 2004, Corn silage budgets for northern, central and southwest Missouri. http://www. agebb.missouri.edu/mgt/budget/fbm-0201.pdf (9/1/04).

Brown, L. R., 1997, The agricultural link: how environmental deterioration could disrupt economic progress: Worldwatch Ins., Washington, DC.

Brummer, E. C., Burras, C. L., Duffy, M. D., and Moore, K. J., 2000, Switchgrass production in Iowa: economic analysis, soil suitability, and varietal performance: Iowa State Univ., Ames, Iowa.

CalGasoline, 2002, Ethanol is not a suitable replacement for MTBE. http://www.calgasoline.com/factetha.htm (9/17/2002).

Citizens for Tax Justice, 1997, More corporate giveaways high on congressional agenda: Citizens for Tax Justice, July 22, 1997. http://www.ctj.org/html/cgive97.htm (9/17/2002).

Coelho, S. T., Bolognini, M. F., Silva, O. C., and Paletta, C. E. M., 2002, Biofuels in Brazil: the current situation: CENBIO—The National Reference Center on Biomass. Technical Texts. http://www.cenbio.org.br/in/index.html (11/12/2002).

College of Agricultural, Consumer and Environmental Sciences, 1997, Machinery cost estimates: summary of operations: Univ. Illinois Urbana-Champaign. http://www.aces.uiuc.edu/~-vo-ag/custom.htm (11/8/01).

Croysdale, D., 2001, Belatedly, DNR concedes our air is clean: The Daily Reporter. November 6, 2001. http://www.dailyreporter.com/editorials/eds/nov07/asa11–7.shtml. (9/17/2002).

DOE, 2002, Review of transport issues and comparison of infrastructure costs for a renewable fuels standard: U.S. Dept. Energy, Washington, D.C. http://tonto.eia.doe.gov/FTPROOT/service/question3.pdf (10/8/2002).

DOE, 2004, Dilute acid hydrolysis. biomass program. Energy efficiency and renewable energy: U.S. Dept. Energy, Washington, DC. http://www.eere.energy.gov/biomass/dilute_acid.html (11/11/04).

Duncan, R. C., and Youngquist, W., 1999, Encircling the peak of world oil production: Natural Resources Research, v. 8, no. 3, p. 219–232.

Economic Research Statistics, 1997, Soybeans: fertilizer use by state, 1996. http://usda.mannlib.cornell.edu/data-sets/inputs/9X171/97171/agch0997.txt (11/11/01).

EPA, 2002, More pollution than they said: ethanol plants said releasing toxins: New York Times, May 3, 2002.

ERAB, 1980, Gasohol: Energy Research Advisory Board, U.S. Dept. Energy, Washington, DC.

ERAB, 1981, Biomass energy: Energy Research Advisory Board, U.S. Dept. Energy, Washington, DC.

FAO, 2001, Food balance sheets: Food and Agriculture Organization of the United Nations, Rome.

Ferguson, A. R. B., 2003, Implications of the USDA 2002 update on ethanol from corn: The Optimum Population Trust, Manchester, U.K., p. 11–15.

Ferguson, A. R. B., 2004, Further implications concerning ethanol from corn: Draft manuscript for the Optimum Population Trust.

Giampietro, M., Ulgiati, S., and Pimentel, D., 1997, Feasibility of large-scale biofuel production: BioScience, v. 47, no. 9, p. 587–600.

Henning, J. C., 1993, Big bluestem, indiangrass and switchgrass: Dept. Agronomy, Campus Extension, Univ. Missouri, Columbia, MO.

Himman, H., Pelter, G., Kulp, E., Sorensen, E., and Ford, W., 1992, Enterprise budgets for fall potatoes, winter wheat, dry beans and seed peas under rill irrigation: Farm Business Management Repts., Columbia, Washington State Univ., Pullman, WA.

Ho, S. P., 1989, Global warming impact of ethanol versus gasoline: presented at 1989 National Conf. Clean Air Issues and Am. Motor Fuel Business, October 1989. Washington, DC.

Hodge, C., 2002, Ethanol use in US gasoline should be banned, not expanded: Oil & Gas Jour., September 9, p. 20–30.

Hodge, C., 2003, More evidence mounts for banning, not expanding, use of ethanol in gasoline: Oil & Gas Jour., October 6, p. 20–25.

Hoffman, T. R., Warnock, W. D., and Hinman, H. R., 1994, Crop enterprise budgets, timothy-legume and alfalfa hay, sudan grass, sweet corn and spring wheat under rill irrigation, Kittitas County, Washington: Farm Business, Repts. EB 1173, Pullman, Washington State Univ.

Illinois Corn, 2004, Ethanol’s energy balance. http://www.ilcorn.org/Ethanol/Ethan_Studies/Ethan_Energy_Bal/ethan_energy_bal.html (8/10/04).

Kansas Ethanol, 2004, Kansas ethanol: clean fuel from Kansas farms. http://www.ksgrains.com/ethanol/useth.html. (9/11/04).

Kassel, P., and Tidman, M., 1999, Ag lime impact on yield in several tillage systems, integrated crop management: Dept. Entomology, Iowa State Univ., Ames, Iowa.

Kidd, C., and Pimentel, D., 1992, Integrated resource management: Agroforestry for Development: Academic, San Diego, CA.

Kim, Y., 2002, World exotic diseases, in Pimentel, D., ed., Biological Invasions: Economic and Environmental Costs of Alien Plant, Animal, and Microbe Species: CRC Press, Boca Raton, FL, p. 331–354.

Knowles, P. F., and Bukantis, R., 1980, Energy inputs and outputs for crop systems, field crops, in Pimentel, D., ed., Handbook of Energy Utilization in Agriculture: CRC Press, Boca Raton, FL, p. 131–132.

Kuby, W. R., Markoja, R., and Nackford, S., 1984, Testing and evaluation of on-farm alcohol production facilities: Acures Corp. Industrial Environmental Research Lab. Office of Research and Development, U.S. Environmental Protection Agency, Cincinnati, OH, 100 p.

Larsen, K., Thompson, D., and Harn, A., 2002, Limited and full irrigation comparison for corn and grain sorghum. http://www.colostate.edu/Depts/SoilCrop/extension/Newsletters/2003/Dr-ought/sorghum.html (9/2/2002).

Larson, W. E., and Cardwell, V. B., 1999, History of U.S. corn production. http://citv.unl.edu/cornpro/html/history/history.html (9/2/04).

Lieberman, B., 2002, The ethanol mistake: one bad mandate replaced by another: Competitive Enterprise Ins. http://www.nationalreview.com/comment/comment-lieber man 031202.shtml (9/17/2002).

Maiorella, B., 1985, Ethanol, in Blanch, H. W. Drew, S., and Wang D. I. C., eds., Comprehensive Biotechnology, Chap. 43, Vol. 3: Pergamon, New York.

McCain, J., 2003, Statement of Senator McCain on the Energy Bill: Press Release. Wednesday, November 2003.

Mead, D., and Pimentel, D., 2005, Use of energy analysis in silvicultural decision making. Biomass and Bioenergy, in press.

NAS, 2003, Frontiers in agricultural research: food, health, environment, and communities: Nat. Acad. Sciences, Washington, DC. http://dels.nas.edu/rpt_briefs/frontiers_in_ag_final%20for%20 print.pdf (11/05/04).

NASS, 1999, National Agricultural Statistics Service. http://usda.mannlib.cornell.edu (30/08/2002).

National Center for Policy Analysis, 2002, Ethanol subsidies: Idea House. National Center for Policy Analysis. http://www.ncpa.org/pd/ag/ag6.html (9/09/2002).

NPRA, 2002, NPRA Opposes ethanol mandate; asks Congress not to hinder efforts to maintain supply: National Petrochemical and Refiners Association, Washington, DC. http://www.npradc.org/news/releases/detail.cfm?docid = 164&archive = 1 (9/17/2002).

Patzek, P., 2004, Thermodynamics of the corn-ethanol biofuel cycle: Critical Reviews in Plant Sciences, in press.

Pimentel, D., 1980, Handbook of energy utilization in agriculture: CRC Press, Boca Raton, FL, 475 p.

Pimentel, D., 1991, Ethanol fuels: energy security, economics, and the environment: Jour. Agri. Environ. Ethics, v. 4, p. 1–13.

Pimentel, D., 1998, Energy and dollar costs of ethanol production with corn: Hubbert Center Newsletter #98/2, M. King Hubbert Center for Petroleum Supply Studies, Colorado Sch. Mines. Golden, CO. 7 p.

Pimentel, D., 2001, The limitations of biomass energy, in Meyers, R., ed., Encyclopedia of Physical Science and Technology. (3rd edn.), Vol. 2: Academic, San Diego, CA, p. 159–171.

Pimentel, D., 2003, Ethanol fuels: energy balance, economics, and environmental impacts are negative: Natural Resources Research, v. 12, no. 2, p. 127–134.

Pimentel, D., Berger, B., Filberto, D., Newton, M., Wolfe, B., Karabinakis, E., Clark, S., Poon, E., Abbett, E., and Nandagopal, S., 2004b, Water resources: current and future issues: BioScience, v. 54, no. 10, p. 909–918.

Pimentel, D., Doughty, R., Carothers, C., Lamberson, S., Bora, N., and Lee, K., 2002, Energy inputs in crop production: comparison of developed and developing countries, in Lal, R., Hansen, D., Uphoff, N., and Slack, S., eds., Food Security and Environmental Quality in the Developing World: CRC Press, Boca Raton, FL, p. 129–151.

Pimentel, D., Harvey, C., Resosudarmo, P., Sinclair, K., Kurz, D., McNair, M., Crist, S., Sphritz, L., Fitton, L., Saffouri, R., and Blair, R., 1995, Environmental and economic costs of soil erosion and conservation benefits: Science, v. 276, no. 531S, p. 1117–1123.

Pimentel, D., Houser, J., Preiss, E., White, O., Fang, H., Mesnick, L., Barsky, T., Tariche, S., Schreck, J., and Alpert, S., 1997, Water resources: agriculture, the environment, and society: BioScience, v. 47, no. 2, p. 97–106.

Pimentel, D., and Pimentel, M., 1996, Food, energy and society: Colorado Univ. Press, Boulder, CO, 363 p.

Pimentel, D., Pleasant, A., Barron, J., Gaudioso, J., Pollock, N., Chae, E., Kim, Y., Lassiter, A., Schiavoni, C., Jackson, A., Lee, M., and Eaton, A., 2004a, U.S. energy conservation and efficiency: Benefits and costs: Environment Development and Sustainability, v. 6, p. 279–305.

Pimentel, D., Warneke, A. F., Teel, W. S., Schwab, K. A., Simcox, N. J., Ebert, D. M., Baenisch, K. D., and Aaron, M. R., 1988, Food versus biomass fuel: Socioeconomic and environmental impacts in the United States, Brazil, India, and Kenya: Adv. Food Res. v. 32, p. 185–238.

PRB, 2004, World Population data sheet: Population Reference Bureau, Washington, DC, 2 p.

Samson, R., 1991, Switchgrass: a living solar battery for the praires: Ecological Agriculture Projects, Mcgill Univ. (Macdonald Campus, Ste-Anne-de-Bellevue, QC, H9X 3V9 Canada. Copyright @ 1991 REAP Canada.

Samson, R., Duxbury, P., Drisdale, M., and Lapointe, C., 2000, Assessment of pelletized biofuels. PERD program: Natural Resources Canada, Contract 23348-8-3145/001/SQ.

Samson, R., Duxbury, P., and Mulkins, L., 2004, Research and development of fibre crops in cool season regions of Canada: Resource Efficient Agricultural Production-Canada. Box 125, Sainte Anne de Bellevue, Quebec, Canada, H9X 3V9. http://www.reap-canada.com/Reports/italy.html (Jun 26, 2004).

Schneider, S. H., Rosencranz, A., and Niles, J. O., 2002, Climate change policy change: Island Press, Washington, DC, 402 p.

Shapouri, H., Duffield, J., McAloon, A., and Wang, M. 2004, The 2001 Net Energy Balance of Corn-Ethanol (Preliminary): US Dept. Agriculture, Washington, DC.

Shapouri, H., Duffield, J. A., and Wang, M., 2002, The energy balance of corn ethanol: an update: USDA, Office of Energy Policy and New Uses, Agricultural Economics. Rept. No. 813. 14 p.

Sheehan, J., Camobreco, V., Duffield, J., Graboski, M., and Shapouri, H., 1998, An overview of biodiesel and petroleum diesel life cycles: Nrel/tp-580-24772. National Renewable Energy Laboratory. U.S. Dept. of Energy.

Singh, R. P., 1986, Energy accounting of food processing, in Singh, R. P., ed., Energy in Food Processing: Elsevier, Amsterdam, p. 19–68.

Slesser, M., and Lewis, C., 1979, Biological energy resources: Halsted, New York.

Spirits Low, 1999, Spirits low as Brazil alcohol car in trouble anew: Reuters. November 22, 1999. http://www.climateark. org/articles/1999/alcocaro.htm (11/15/04).

Stanton, T. L., 1999, Feed composition for cattle and sheep: Colorado State Univ. Cooperative extension. Rept. No. 1.615. 7 p.

USCB, 2003, Statistical abstract of the United States 2003: U.S. Census Bureau, U.S. Government Printing Office, Washington, DC.

USCB, 2004, Statistical abstract of the United States 2003: U.S. Census Bureau, U.S. Government Printing Office, Washington, DC.

USDA, 1991, Corn-state. costs of production: U.S. Dept. Agriculture, Economic Research Service, Economics and Statistics System, Washington, D.C. Stock #94018.

USDA, 1997a, Farm and ranch irrigation survey (1998). 1997: Census of Agriculture. Vol. 3, Spec. Studies, Part 1. 280 p.

USDA, 1997b, 1997 Census of agriculture: U.S. Dept. Agriculture. http://www.ncfap.org. (8/28/2002).

USDA, 2002, Agricultural statistics: U.S. Government Printing Office, Washington, DC.

USDA, 2003a, Agricultural statistics: USDA, Washington, DC, I-1-XV-34 p.

USDA, 2003b, Agricultural chemicals and production technology: questions and answers: Economic Research Service. U.S. Dept. Agriculture. http://www.ers.usda.gov/Briefing/AgChemicals/Questions/nmqa5.htm (update 11/12/2002) (9/1/04).

Wereko-Brobby, C., and Hagan, E. B., 1996, Biomass conversion and technology: John Wiley, Chichester.

WHO, 2000, Nutrition for health and development: a global agenda for combating malnutrition. http://www.who.int/nut/documents/nhd_mip_2000.pdf (11/3/04).

Wilcke, B., and Chaplin, J., 2000, Fuel saving ideas for farmers: Minnėsota/Wisconsin Engineering Notes. http://www.bae. umn.edu/extens/ennotes/enspr00/fuelsaving.htm (9/2/04).

Wood Tub Grinders, 2004, Wood tub grinders. http://p2library. nfesc.navy.mil/P2_Opportunity_Handbook/7_III_13. html (8/3/04).

Youngquist, W., 1997, GeoDestinies: the inevitable control of earth resources over nations and individuals: National Book Company, Portland, OR, 499 p.