Since humans worldwide obtain more than 99.7% of their food (calories) from the land and less than 0.3% from the oceans and aquatic ecosystems, preserving cropland and maintaining soil fertility should be of the highest importance to human welfare. Soil erosion is one of the most serious threats facing world food production. Each year about 10 million ha of cropland are lost due to soil erosion, thus reducing the cropland available for world food production. The loss of cropland is a serious problem because the World Health Organization and the Food and Agricultural Organization report that two-thirds of the world population is malnourished. Overall, soil is being lost from agricultural areas 10 to 40 times faster than the rate of soil formation imperiling humanity’s food security.
References
[1]
Lal, R.; Stewart, B.A. Soil Degradation; Springer-Verlag: New York, NY, USA, 1990.
[2]
Pimentel, D.; Harvey, C.; Resosudarmo, P.; Sinclair, K.; Kurz, D.; McNair, M.; Crist, S.; Sphpritz, L.; Fitton, L.; Saffouri, R.; et al. Environmental and economic costs of soil erosion and conservation benefits. Science 1995, 267, 1117–1123, doi:10.1126/science.267.5201.1117.
[3]
Troeh, F.R.; Hobbs, A.H.; Donahue, R.L. Soil and Water Conservation: For Productivity and Environmental Protection; Prentice Hall: Upper Saddle River, NJ, USA, 2004.
[4]
WHO. Nutrition for Health and Development: A Global Agenda for Combating Malnutrition. Progress Report; World Health Organization, Nutrition for Health and Development (NHD), Sustainable Development and Healthy Environments (SDE): Rome, Italy, 2000. Available online: http://whqlibdoc.who.int/hq/2000/WHO_NHD_00.6.pdf (accessed on 1 August 2013).
[5]
Pimentel, D.; Satkiewicz, P. Malnutrition. In Encyclopedia of Sustainability, Volume Natural Resources and Sustainability; Berkshire Publishing Group: Great Barrington, MA, USA, 2013. in press.
[6]
Webster’s Third New International Dictionary of the English Language Unabridged; Gove, P.B., Ed.; G. & C. Merriam Co.: Springfield, MA, USA, 1971.
[7]
UN. World Population Prospects: The 2010 Revision. Volume I: Comprehensive TablesST/ESA/SER.A/313. United Nations: New York, USA, 2011. Available online: http://esa.un.org/unpd/wpp/Documentation/pdf/WPP2010_Volume-I_Comprehensive-Tables.pdf (accessed on 1 August 2013).
[8]
FAO. FAO Food Balance Sheets. FAOSTAT, Food and Agriculture Organization of the United Nations, 2004. 2004. Available online: http://faostat.fao.org/site/368/default.aspx#ancor (accessed on 1 August 2013).
[9]
Young, A. Land Resources: Now and for the Future; Cambridge University Press: Cambridge, UK, 1998.
[10]
Lal, R. Enhancing crop yield in the developing countries through restoration of soil organic carbon pool in agricultural lands. Land Degrad. Dev. 2006, 17, 197–209, doi:10.1002/ldr.696.
[11]
Pimentel, D. Soil erosion: A food and environmental threat. Environ. Dev. Sustain. 2006, 8, 119–137, doi:10.1007/s10668-005-1262-8.
[12]
Pimentel, D.; Cornell University, Ithaca, NY, USA. 2013.
[13]
Troeh, F.R.; Hobbs, J.A.; Donahue, R.L. Soil and Water Conservation, 3rd ed. ed.; Prentice Hall: Upper Saddle River, NJ, USA, 1999.
[14]
Oldeman, L.R. Soil degradation: A threat to food security?Report 98/01. International Soil Reference and Information Centre: Wageningen, The Netherlands, 1998. Available online: http://www.isric.org/isric/webdocs/Docs/ISRIC_Report_1998_01.pdf (accessed on 1 August 2013).
[15]
SeaWIFS Project, NASA/Goddard Space Flight Center and ORBIMAGE. 2000. Available online: http://visibleearth.nasa.gov/view.php?id=53872 (accessed on 1 August 2013).
[16]
Bajracharya, R.M.; Lal, R. Seasonal soil loss and erodibility variation on a Miamian silt loam soil. Soil Sci. Soc. Am. J. 1992, 56, 1560–1565, doi:10.2136/sssaj1992.03615995005600050037x.
[17]
Pimentel, D.; Hepperly, P.; Hanson, J.; Douds, D.; Seidel, R. Environmental, energetic and economic comparisons of organic and conventional farming systems. BioScience 2005, 55, 573–582, doi:10.1641/0006-3568(2005)055[0573:EEAECO]2.0.CO;2.
[18]
Trimble, S.W.; Mendel, A.C. The cow as a geomorphic agent—A critical review. Geomorphology 1995, 13, 233–253, doi:10.1016/0169-555X(95)00028-4.
[19]
Singh, T.V.; Kaur, J. Studies in Himalayan Ecology and Development Strategies, revised ed. ed.; Himalayan Books: New Delhi, India, 1989.
[20]
Haigh, M.J.; Rawat, J.S.; Rawatc, M.S.; Bartarya, S.K.; Rai, S.P. Interactions between forest and landslide activity along new highways in the Kumaun Himalaya. For. Ecol. Manag. 1995, 78, 173–189, doi:10.1016/0378-1127(95)03584-5.
[21]
Wye Research and Education Center. Riparian Forest Buffer Panel (Bay Area Regulatory Programs). 2002. Available online: http://www.riparianbuffers.umd.edu/manuals/regulatory.html (accessed on 1 August 2013).
[22]
Wen, D. Soil Erosion and Conservation in China. In Soil Erosion and Conservation; Pimentel, D., Ed.; Cambridge University Press: New York, NY, USA, 1993; pp. 63–86.
[23]
Hassan, M.K.; Pelkonen, P.; Pappinen, A. Assessment of bioenergy potential from major crop residues and wood fuels in Bangladesh. J. Basic Appl. Sci. Res. 2011, 1, 1039–1051.
[24]
Li, L.; Ishikawa, Y.; Mihara, M. Effects of burning crop residues on soil quality in Wenshui, Shanxi of China. IJERD 3-1, 2012. Available online: http://iserd.net/ijerd31/31030.pdf (accessed on 1 August 2013).
[25]
Lal, R. There is No Such Thing as a Free Biofuel From Crop Residues. Soil Science Society of America, Past President’s Message Archive, 2007. Available online: https://www.soils.org/about-society/presidents-message/archive/2 (accessed on 1 August 2013).
[26]
McLaughlin, L. Soil Conservation Planning in the People’s Republic of China: An Alternative Approach. Ph.D. Thesis, Cornell University, Ithaca, NY, USA, 1991.
[27]
Juo, A.S.R.; Thurow, T.L. Sustainable Technologies for Use and Conservation of SteeplandsFood & Fertilizer Technology Center for the Asian and Pacific Region Bulletin 448. 1997. Available online: http://www.agnet.org/library.php?func=view&id=20110804181442&type_id=4 (accessed on 1 August 2013).
[28]
Gupta, J.P.; Raina, P. Wind Erosion and Its Control on Hot Arid Areas of Rajasthan. In Wind Erosion in West Africa: The Problem and Its Control; Buerkert, B., Allison, B.E., von Oppen, M., Eds.; Margraf Verlag: Berlin, Germany, 1996; pp. 209–218.
[29]
USDA/NRCS. 2007 National Resources Inventory: Soil Erosion on Cropland. U.S. Department of Agriculture/National Resources Conservation Service, 2010. 2010. Available online: http://www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/nrcs143_012269.pdf (accessed on 1 August 2013).
[30]
Grimm, M.; Jones, R.; Montanarella, L. Soil Erosion Risk in Europe (Revised). European Soil Bureau, Institute for Environment & Sustainability, Joint Research Centre, 2002. (revised). 2002. (revised). Available online: http://www.env-edu.gr/Documents/Soil%20Erosion%20Risk%20in%20Europe.pdf (accessed on 1 August 2013).
[31]
Verheijen, F.G.A.; Jones, R.J.A.; Rickson, R.J.; Smith, C.J. Tolerable versus actual erosion rates in Europe. Earth Sci. Rev. 2009, 94, 23–38, doi:10.1016/j.earscirev.2009.02.003.
[32]
FAO. Restoring the Land. Food and Agriculture Organization of the United Nations: Rome, Italy. Available online: http://www.fao.org/docrep/u8480e/u8480e0d.htm (accessed on 1 August 2013).
[33]
IECA. Erosion Control—A Global Perspective. In Proceedings of Conference XXII, International Erosion Control Association, Orlando, FL, USA, 20–22 February 1991.
[34]
Morrow, S.; Smolen, M.; Stiegler, J.; Cole, J. Using Vegetation for Erosion Control on Construction SitesOklahoma Cooperative Extension Service BAE-1514. Available online: http://pods.dasnr.okstate.edu/docushare/dsweb/Get/Document-2264/BAE-1514web.pdf (accessed on 1 August 2013).
[35]
SWCC. Alabama Handbook for Erosion Control, Sediment Control and Stormwater Management on Construction Sites and Urban Areas. Soil and Water Conservation Committee, State of Alabama, 2009. 2009. Available online: http://www.swcc.alabama.gov/pages/erosion_handbook.aspx (accessed on 1 August 2013).
[36]
Patric, J.H. Soil erosion in the eastern forest. J. For. 1976, 74, 671–677.
[37]
DeVere Burton, L. Agricscience: Fundamentals and Applications; Delmar Cengage Learning: Clifton Park, NY, USA, 2010.
[38]
Myers, N. Gaia: An Atlas of Planet Management; Anchor/DoubleDay: Garden City, NY, USA, 1993.
[39]
Eswaran, H.; Lal, R.; Reich, P.F. Land Degradation: An overview. In Response to Land Degradation, Proceedings of the 2nd International Conference on Land Degradation and Desertification, Khon Kaen, Thailand, 25–29 January 1999; Bridges, E.M., Hannam, I.D., Oldeman, L.R., Pening de Vries, F.W.T., Scherr, S.J., Sompatpanit, S., Eds.; Oxford University Press: New Delhi, India, 2002. Available online: http://soils.usda.gov/use/worldsoils/papers/land- degradation-overview.html (accessed on 1 August 2013).
[40]
Reich, P.; Eswaran, H.; Beinroth, F. Global Dimensions of Vulnerability to Wind and Rain Erosion. In Sustaining the Global Farm, Proceedings of the 10th International Soil Conservation Organization Meeting, 24–29 May 1999; Stott, D.E., Mohtar, R.H., Steinhardt, G.C., Eds.; pp. 838–846. Available online: http://topsoil.nserl.purdue.edu/nserlweb-old/isco99/pdf/ISCOdisc/ tableofcontents.htm (accessed on 1 August 2013).
[41]
Wen, D. Agriculture in China: Water and Energy Resources. Agriculture in China: 1949–2030; IDEALS: Beltsville, MD, USA, 1998; pp. 479–497. Available online: http://conservancy.umn.edu/handle/58873 (accessed on 1 August 2013).
[42]
The Hindu. India losing 5,334 million tonnes of soil annually due to erosion: Govt. The Hindu, 26 November 2010. Available online: http://www.thehindu.com/sci-tech/agriculture/india-losing-5334-million-tonnes-of-soil-annually-due-to-erosion-govt/article915245.ece (accessed on 1 August 2013).
[43]
Stedman, L. China: Study Finds Entire Country Suffering Significant Soil and Water Losses. IWA Publishing, 27 January 2009. 27 January 2009. Available online: http://www.iwapublishing.com/template.cfm?name=news245 (accessed on 1 August 2013).
[44]
Jie, D. Chinese Soil Experts Warn Of Massive Threat to Food Security. SciDevNet, 5 August 2010. Available online: http://www.scidev.net/global/earth-science/news/chinese-soil-experts-warn-of-massive-threat-to-food-security.html (accessed on 11 July 2013).
[45]
Pimentel, D.; Pimentel, M. Food, Energy, and Society; CRC Press: Boca Raton, FL, USA, 2008.
[46]
World Resources 1996–1997: The Urban Environment; New York, NY, USA, 1997. 1997. Available online: http://www.wri.org/publication/world-resources-1996-97-urban-environment (accessed on 1 August 2013).
[47]
Lal, R. Water management in various crop production systems related to soil tillage. Soil Tillage Res. 1994, 30, 169–185, doi:10.1016/0167-1987(94)90004-3.
[48]
Speth, J.G. Towards an Effective and Operational International Convention on Desertification; International Convention on Desertification, Int. Negotiating Comm, United Nations: New York, NY, USA, 1994.
[49]
Kendall, H.W.; Pimentel, D. Constraints on the expansion of the global food supply. Ambio 1994, 23, 198–205.
[50]
World Resources 1994–1995: People and the Environment; New York, NY, USA, 1994. 1994. Available online: http://www.wri.org/publication/world-resources-1994-95-people-and-environment (accessed on 1 August 2013).
[51]
Lal, R. Soil Erosion and Land Degradation: The Global Risks. In Soil degradation; Lal, R., Stewart, B.A., Eds.; Springer-Verlag: New York, NY, USA, 1990; pp. 129–172.
[52]
Heywood, V.H. Global Biodiversity Assessment; Cambridge University Press: Cambridge, UK, 1995.
[53]
Faeth, P.; Crosson, P. Building the case for sustainable agriculture. Environment 1994, 36, 16–20, doi:10.1080/00139157.1994.9929138.
[54]
Stone, R.P.; Moore, N. Control of Soil Erosion. Ontario Ministry of Agriculture Factsheet. 1997. Available online: http://www.omafra.gov.on.ca/english/engineer/facts/95-089.htm (accessed on 1 August 2013).
[55]
Southgate, D.; Whitaker, M. Promoting resource degradation in Latin America: Tropical deforestation, soil erosion, and coastal ecosystem disturbance in Ecuador. Econ. Dev. Cult. Change 1992, 40, 787–807.
[56]
Lal, R. Erosion-crop productivity relationships for soils of Africa. Soil Sci. Soc. Am. J. 1995, 59, 661–667, doi:10.2136/sssaj1995.03615995005900030004x.
[57]
USDA. Changes in Average Annual Soil Erosion by Water on Cropland and CRP Land, 1992–1997. Revised December 2000; USDA, Natural Resources Conservation Service: Washington, DC, USA, 2000. Available online: http://www.nrcs.usda.gov/wps/portal/nrcs/detail/national/technical/?cid=nrcs143_013789 (accessed 1 August 2013).
[58]
Sundquist, B. Chapter 9—Food Supply from Soil. Topsoil Loss and Degradation—Causes, Effects and Implications, 2010. Available online: http://home.windstream.net/bsundquist1/se9.html (accessed on 1 August 2013).
[59]
Klee, G.A. Conservation of Natural Resources; Prentice Hall: Englewood Cliffs, NJ, USA, 1991.
[60]
USDA. The Second RCA Appraisal. Soil, Water, and Related Resources on Nonfederal Land in the United States, Analysis of Conditions and Trends; U.S. Department of Agriculture, U.S. Government Print Office: Washington, DC, USA, 1989.
[61]
Duffy, M. Value of Soil Erosion to the Land OwnerAgr Decision Maker, File A1-75 (August 2012). Iowa State University, Extension and Outreach, 2012. 2012. Available online: http://www.extension.iastate.edu/agdm/crops/html/a1-75.html (accessed on 1 August 2013).
[62]
Ebbert, J.C.; Roe, R.D. Soil Erosion in the Palouse River Basin: Indications of Improvement. Science for a changing world, USGS Fact Sheet FS-069-98; US Geological Survey: Reston, VA, USA, 1998.
[63]
World Problems. In Encyclopedia of World Problems and Human Potential, 4th ed.; Saur, K.D., Ed.; Union of International Associations: München, Germany, 1995; Volume 1.
[64]
NAS. Frontiers in Agricultural Research: Food, Health, Environment and Communities; National Academy of Sciences, National Research Council, National Academies Press: Washington, DC, USA, 2003.
[65]
Johnson, P.W. Agriculture. Food and Drug Administration, Rural Development; U.S. Government Printing Office: Washington, DC, USA, 1995.
[66]
Bailey, A.W. Managing Canadian Rangelands as a Sustainable Resource: Policy Issues. In Rangelands in a Sustainable Biosphere, Proceedings of the Fifth International Rangeland Congress, Salt Lake City, UT, USA, 23–28 July 1995; Society for Range Management: Denver, CO, USA, 1996; Volume 2, pp. 5–7.
Behnke, R.H., Jr.; Scoones, I. Rethinking Range Ecology: Implications for Rangeland Management in Africa. In Range Ecology at Disequilibrium: New Models of Natural Variability and Pastoral Adaptation in African Savannas; Behnke, R.H., Jr., Scoones, I., Kerven, C., Eds.; Overseas Development Institute, International Institute for Environment and Development Commonwealth Secretariat: London, UK, 1993; pp. 1–30.
[70]
Bartels, G.B.; Norton, B.E.; Perrier, G.K. An Examination of the Carrying CapaCity Concept. In Range Ecology at Disequilibrium: New Models of Natural Variability and Pastoral Adaptation in African Savannas; Behnke, R.H., Jr., Scoones, I., Kerven, C., Eds.; Overseas Development Institute, International Institute for Environment and Development Commonwealth Secretariat: London, UK, 1993; pp. 89–103.
[71]
Roose, E. Soil and Water Conservation Lessons from Steep-Slope Farming in French Speaking Countries of Africa. In Conservation Farming on Steep Lands; Moldenhauer, W.C., Hudson, N., Eds.; Soil and Water Conservation Society, World Association of Soil and Water Conservation: Ankeny, IA, USA, 1988; pp. 130–131.
[72]
Daily, G. Nature’s Services: Societal Dependence on Natural Ecosystems; Island Press: Washington, DC, USA, 1996.
[73]
Jones, A.J.; Lal, R.; Huggins, D.R. Soil erosion and productivity research: A regional approach. Am. J. Altern. Agric. 1997, 12, 183–192.
[74]
Pimentel, D.; Petrova, T.; Riley, M.; Jacquet, J.; Ng, V.; Honigman, J.; Valero, E. Conservation of Biological Diversity in Agricultural, Forestry, and Marine Systems. In Focus on Ecology Research; Burk, A.R., Ed.; Nova Science Publishers: New York, NY, USA, 2006; pp. 151–173.
[75]
Brevik, E.C. Soil Health and Productivity. Soils, Plant Growth and Crop Production; Encyclopedia of Life Support Systems (EOLSS), Developed under the Auspices of the UNESCO, EOLSS Publishers: Oxford, UK, 2009. Available online: http://www.eolss.net (accessed on 1 August 2013).
[76]
Pimentel, D.; Houser, J.; Preiss, E.; White, O.; Fang, H.; Mesnick, L.; Barksy, T.; Tariche, S.; Schreck, J.; Alpert, S. Water resources: Agriculture, the environment, and society. BioScience 1997, 47, 97–106, doi:10.2307/1313020.
[77]
Pimentel, D.; Berger, B.; Filiberto, D.; Newton, M.; Wolfe, B.; Karabinakis, B.; Clark, S.; Poon, E.; Abbett, E.; Nandagopal, S. Water resources: Agricultural and environmental issues. BioScience 2004, 54, 909–918, doi:10.1641/0006-3568(2004)054[0909:WRAAEI]2.0.CO;2.
[78]
Young, A. Agroforestry for Soil Conservation; CAB: Wallingford, UK, 1989.
[79]
Schertz, D.L.; Moldenhauer, W.C.; Livingston, S.J.; Weesies, G.A.; Hintz, E.A. Effect of past soil erosion on crop productivity in Indiana. J. Soil Water Conserv. 1989, 44, 604–608.
Brevik, E.C. Soils and Human Health—An Overview. In Soils and Human Health; Brevik, E.C., Burgess, L.C., Eds.; CRC Press: Boca Raton, FL, USA, 2012; pp. 29–56.
[82]
Allison, F.E. Soil Organic Matter and Its Role in Crop Production; Elsevier: New York, NY, USA, 1973.
[83]
Libert, B. The Environmental Heritage of Soviet Agriculture; CAB International: Wallingford, UK, 1995.
[84]
Wardle, D.A.; Bardgett, R.D.; Klironomos, J.N.; Setala, H.; van der Putten, W.H.; Wall, D.H. Ecological Linkages between aboveground and belowground biota. Science 2004, 304, 1629–1633, doi:10.1126/science.1094875.
[85]
Lazaroff, C. Biodiversity Gives Carbon Sinks a Boost. Environment News Service, 13 April 2001. Available online: http://www.ens-newswire.com/ens/apr2001/2001-04-13-06.asp (accessed on 1 August 2013).
[86]
Walsh, K.N.; Rowe, M.S. Biodiversity Increases Ecosystems’ Ability to Absorb CO2 and Nitrogen. Brookhaven National Laboratory, 2001. 2001. Available online: http://www.bnl.gov/bnlweb/pubaf/pr/2001/bnlpr041101.htm (accessed on 1 August 2013).
[87]
Wright, D.H. Human impacts on energy flow through natural ecosystems, and replications for species endangerment. Ambio 1990, 19, 189–194.
[88]
Elton, C.S. Animal Ecology; Sidgwick and Jackson: London, UK, 1927.
[89]
Odum, E.P. Fundamentals of Ecology; Saunders: New York, NY, USA, 1978.
[90]
Sugden, A.M.; Rands, G.F. The ecology of temperate and cereal fields. Trends Ecol. Evol. 1990, 5, 205–206, doi:10.1016/0169-5347(90)90131-V.
[91]
Giampietro, M. Socioeconomic constraints to farming with biodiversity. Agric. Ecosyst. Environ. 1997, 62, 145–167, doi:10.1016/S0167-8809(96)01137-1.
Wood, M. Soil Biology; Blackie, Chapman and Hall: New York, NY, USA, 1989.
[94]
Lee, E.; Foster, R.C. Soil fauna and soil structure. Aust. J. Soil Res. 1991, 29, 745–776, doi:10.1071/SR9910745.
[95]
Atlavinyte, O. The effect of erosion on the population of earthworms (Lumbricidae) in soils under different crops. Pedobiologia 1965, 5, 178–188.
[96]
FAO. Soils. Land Resources; Food and Agriculture Organization of the United Nations: Rome, Italy, 2001. Available online: http://www.fao.org/nr/land/soils/en/ (accessed on 1 August 2013).
[97]
Reid, W.S. Regional Effects of Soil Erosion on Crop Productivity-Northeast. In Soil Erosion and Crop Productivity; Follett, R.F., Stewart, B.A., Eds.; American Society of Agronomy: Madison, WI, USA, 1985; pp. 235–250.
[98]
Hepperly, P.; Seidel, R.; Pimentel, D.; Hanson, J.; Douds, D. Organic Farming Enhances Soil Carbon and Its Benefits. In Soil Carbon Management: Economic, Environmental and Social Benefits; Kimble, J.M., Rice, C.W., Eds.; CRC Press: Boca Raton, FL, USA, 2007; pp. 129–153.
[99]
Bohac, J.; Pokarzhevsky, A. Effect of Manure and NPK on Soil Macrofauna in Chernozem Soil. In Proceedings of the 9th International Symposium on Soil Biology and Conservation of Biosphere, Budapest, Hungary, 27–30 September 1985; Szegi, J., Ed.; Akademiai Kiado: Budapest, Hungary, 1987; pp. 15–19.
[100]
Kitazawa, Y.; Kitazawa, T. Influence of Application of a Fungicide, an Insecticide, and Compost upon Soil Biotic Community. In Soil Biology as Related to Land Use Practices; Sindal, D.L., Ed.; Environmental Protection Agency, Office of Pesticide and Toxic Substances: Washington, DC, USA, 1980; pp. 94–99.
[101]
Olah-Zsupos, A.; Helmeczi, B. The Effect of Soil Conditioners on Soil Microorganisms. In Proceedings of the 9th International Symposium on Soil Biology and Conservation of Biosphere, Budapest, Hungary, 27–30 September 1985; Szegi, J., Ed.; Akademiai Kiado: Budapest, Hungary, 1987; pp. 829–837.
[102]
Pimentel, D.; Warneke, A. Ecological effects of manure, sewage sludge, and other organic wastes on arthropod populations. Agric. Zool. Rev. 1989, 3, 1–30.
[103]
Tilman, D.; Downing, J.A. Biodiversity and stability in grasslands. Nature 1994, 367, 363–365, doi:10.1038/367363a0.
[104]
Witt, B. Using Soil Fauna to Improve Soil Health. University of Minnesota Digital Conservancy, 1997. 1997. Available online: http://conservancy.umn.edu/bitstream/58873/1/2.8.Witt.pdf (accessed on 1 August 2013).
[105]
Sugden, A.M.; Stone, R.; Ash, C. Ecology in the underworld. Science 2004, 304, 1613, doi:10.1126/science.304.5677.1613.
[106]
Aina, P.O. Contribution of earthworms to porosity and water infiltration in the tropical soil under forest and long-term cultivation. Pedobiologia 1984, 26, 131–136.
[107]
Lavelle, P. The soil fauna of tropical savannas II. The earthworms. Ecosyst. World 1983, 13, 485–504.
[108]
Lee, K.E. Earthworms: Their Ecology and Relationships with Soils and Land Use; Academic Press: Orlando, FL, USA, 1985.
[109]
Lockaby, B.G.; Adams, J.C. Pedoturbation of a forest soil by fire ants. Soil Sci. Soc. Am. J. 1985, 49, 220–223.
[110]
Van Vliet, P.C.J.; Hendrix, P.F. Role of Fauna in Soil Physical Processes. In Soil Biological Fertility: A Key to Sustainable Land Use in Agriculture; Abbott, L.K., Murphy, D.V., Eds.; Springer: Dordrecht, The Netherlands, 2007; pp. 61–80.
[111]
Shachak, M.; Jones, C.G.; Brand, S. The Role of Animals in an Arid Ecosystem: Snails and Isopods as Controllers of Soil Formation, Erosion and Desalinization. In Arid Ecosystems; Blume, H.-P., Berkowicz, S.M., Eds.; Catena: Cremlingen-Destedt, Germany, 1995; pp. 37–50.
[112]
Ziemer, R.R. Flooding and stormflows. In Proceedings of the Conference on Coastal Watersheds: The Caspar Creek story, Ukia, CA; Pacific Southwest Research Station, USDA Forest Service: Albany, CA, USA, 1998; pp. 15–24.
[113]
McLaughlin, L. A Case Study in Dingxi County, Gansu Province, China. In World Soil Erosion and Conservation; Pimentel, D., Ed.; Cambridge University Press: Cambridge, UK, 1993; pp. 87–107.
[114]
Zhang, X.; Walling, D.E.; Quine, T.A.; Wen, A. Use of reservoir deposits and caesium-137 measurements to investigate the erosional response of a small drainage basin in the rolling loess plateau region of China. Land Degrad. Dev. 1997, 8, 1–16, doi:10.1002/(SICI)1099-145X(199703)8:1<1::AID-LDR240>3.0.CO;2-X.
[115]
Yang, Z.S.; Milliman, J.D.; Galler, J.; Liu, J.P. Yellow River’s Water and Sediment Discharge Decreasing Steadily. Eos. Trans. Am. Geophys. Union 1998, 79, 589–592.
[116]
Watershed. Cumulative Watershed Effects. Klamath Resource Information System (KRIS), 2002. Available online: http://www.krisweb.com/watershd/impacts.htm (accessed on 1 August 2013).
[117]
Ontario Envirothon. [Chapter 7] Soil Erosion. Ontario Envirothon, A Program of Ontario Forestry Association, 2007. 2007. Available online: http://www.ontarioenvirothon.on.ca/files/soil/soil_Chapter7.pdf (accessed on 1 August 2013).
[118]
Pimentel, D. Soil erosion. Environment 1997, 39, 4–5.
[119]
Britt, R.R. History Repeats: The Great Flood of 1993. LiveScience, 2008. Available online: http://www.livescience.com/7508-history-repeats-great-flood-1993.html (accessed on 1 August 2013).
[120]
Clark, E.H. Soil Erosion: Offsite Environmental Effects. In Soil Loss: Processes, Policies, and Prospects; Harlin, J.M., Bernardi, G.M., Eds.; Westview: New York, NY, USA, 1987; pp. 59–89.
[121]
WSU Extension. In Controlling Cropland Wind Erosion and Off-Site Impacts in the PNW. MISC0177; Washington State University Extension Publishing and Printing: Pullman, WA, USA, 1994.
[122]
USGS. Human Health: Potential Contaminants and Pathogens in Air, Dusts and Soils. U.S, Geological Survey, U.S. Department of the Interior, 2007. 2007. Available online: http://health.usgs.gov/inhalation/ (accessed on 1 August 2013).
[123]
Huszar, P.C.; Piper, S.L. Off-Site Costs of Wind Erosion in New Mexico. In Off-Site Costs of Soil Erosion: The Proceedings of a Symposium; Waddell, T.E., Ed.; The Conservation Foundation: Washington, DC, USA, 1985; pp. 143–166.
[124]
Pimentel, D.; Kounang, N. Ecology of soil erosion in ecosystems. Ecosystems 1998, 1, 416–426, doi:10.1007/s100219900035.
[125]
Griffin, D.W.; Kellogg, C.A.; Shinn, E.A. Dust in the wind: Long range transport of dust in the atmosphere and its implications for global public and ecosystem health. Glob. Change Hum. Health 2001, 2, 20–33, doi:10.1023/A:1011910224374.
[126]
Phillips, D.L.; White, D.; Johnson, B. Implications of climate change scenarios for soil erosion potential in the USA. Land Degrad. Dev. 1993, 4, 61–72, doi:10.1002/ldr.3400040202.
[127]
Lal, R.; Follett, R.F.; Kimble, J.; Cole, C.V. Managing U.S. cropland to sequester carbon in soil. J. Soil Water Conserv. 1999, 54, 374–381.
[128]
Lal, R. One Answer for Cleaner Air, Water: Better Agricultural Practices. Ohio State Research News, 2002. Available online: http://researchnews.osu.edu/archive/sequest.htm (accessed on 12 May 2011).
[129]
Lal, R. Soil carbon sequestration impacts on global climate change and food security. Science 2004, 304, 1623–1627, doi:10.1126/science.1097396.
[130]
USDA. Summary Report 1992 National Resources Inventory; Soil Conservation Service, USDA: Washington, DC, USA, 1994.
[131]
Pimentel, D.; Bailey, O.; Kim, P.; Mullaney, E.; Calabrese, J.; Walman, L.; Nelson, F.; Yao, X. Will limits of the Earth’s resources control human numbers? Environ. Dev. Sustain. 1999, 1, 19–39, doi:10.1023/A:1010008112119.
[132]
Pimentel, D.; Marklein, A.; Toth, M.A.; Karpoff, M.; Paul, G.S.; McCormack, R.; Kyriazis, J.; Krueger, T. Food versus biofuels: Environmental and economic costs. Hum. Ecol. 2009, 37, 1–12, doi:10.1007/s10745-009-9215-8.
[133]
FAO. FAO Quarterly Bulletin of Statistics; Food and Agriculture Organization of the United Nations: Rome, Italy, 1988–1999; Volume 1–12.
