Soil Degradation, Land Scarcity and Food Security: Reviewing a Complex Challenge
Tóm tắt
Soil health, along with water supply, is the most valuable resource for humans, as human life depends on the soil’s generosity. Soil degradation, therefore, poses a threat to food security, as it reduces yield, forces farmers to use more inputs, and may eventually lead to soil abandonment. Unfortunately, the importance of preserving soil health appears to be overlooked by policy makers. In this paper, I first briefly introduce the present situation concerning agricultural production, natural resources, soil degradation, land use and the challenge ahead, to show how these issues are strictly interwoven. Then, I define soil degradation and present a review of its typologies and estimates at a global level. I discuss the importance of preserving soil capital, and its relationship to human civilization and food security. Trends concerning the availability of arable agricultural land, different scenarios, and their limitations, are analyzed and discussed. The possible relation between an increase in a country’s GNP, population and future availability of arable land is also analyzed, using the World Bank’s database. I argue that because of the many sources of uncertainty in the data, and the high risks at stake, a precautionary approach should be adopted when drawing scenarios. The paper ends with a discussion on the key role of preserving soil organic matter, and the need to adopt more sustainable agricultural practices. I also argue that both our relation with nature and natural resources and our lifestyle need to be reconsidered.
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Tài liệu tham khảo
UN (United Nations) (2013). Draft Resolution Submitted by the Vice-Chair of the Committee, Ms. Farrah Brown (Jamaica), on the Basis of Informal Consultations on Draft Resolution A/C.2/68/L.21" (PDF), United Nations General Assembly. Available online: http://www.fao.org/fileadmin/user_upload/GSP/docs/iys/World_Soil_Day_and_International_Year_of_Soils__UNGA_Resolution_Dec._2013.pdf.
Da Silva, H.G. (2014). Soils Are the Foundations of Family Farming, FAO. Available online: http://www.fao.org/soils-2015/news/news-detail/en/c/271795/.
Blaikie, P., and Brookfield, H. (1987). Land Degradation and Society, Routledge.
Hillel, D. (1991). Out of the Earth: Civilization and the Life of the Soil, University of California Press.
Pimentel, 1995, Environmental and economic costs of soil erosion and conservation benefits, Science, 267, 1117, 10.1126/science.267.5201.1117
Lal, 1997, Degradation and resilience of soils, Philos. Trans. R. Soc. Lond. B, 352, 997, 10.1098/rstb.1997.0078
Karlen, 2001, Soil Quality: Current Concepts and Applications, Adv. Agron., 74, 1, 10.1016/S0065-2113(01)74029-1
Karlen, D.L. (2014). Special issue “Enhancing Soil Health to Mitigate Soil Degradation”. Sustainability, 7, Available online: http://www.mdpi.com/journal/sustainability/special_issues/soil-degradation.
JRC (Joint Research Centre) Communication From The Commission To The Council, The European Parliament, The European Economic And Social Committee And The Committee Of The Regions—Thematic Strategy for Soil Protection. Available online: http://eusoils.jrc.ec.europa.eu/ESDB_Archive/Policies/Directive/com_2006_0231_en.pdf.
Korzekwa, K. (2015). International Year of Soils Aims to Raise Soil’s Profile, Soil Science Society of America. Available online: https://www.soils.org/discover-soils/story/international-year-soils-aims-raise-soils-profile.
JRC (Joint Research Centre) European Network on Soil Awareness. Available online: http://esdac.jrc.ec.europa.eu/networkcooperations/european-network-soil-awareness.
FAO and ITPS (2015). Status of the World’s Soil Resources (SWSR), Food and Agriculture Organization of the United Nations and Intergovernmental Technical Panel on Soils. Available online: ftp://ext-ftp.fao.org/nr/Data/Upload/SWSR_MATTEO/Main_report/Pdf/web_Soil_Report_Main_001.pdf.
Gomiero, 2011, Is there a need for a more sustainable agriculture?, Crit. Rev. Plant Sci., 30, 6, 10.1080/07352689.2011.553515
Karlen, 2014, Soil and water conservation: Our history and future challenges, Soil Sci. Soc. Am. J., 78, 1493, 10.2136/sssaj2014.03.0110
DeLong, 2015, The Soil Degradation Paradox: Compromising Our Resources When We Need Them the Most, Sustainability, 7, 866, 10.3390/su7010866
Karlen, 2015, Soil Degradation: Will Humankind Ever Learn?, Sustainability, 7, 12490, 10.3390/su70912490
Tilman, 2002, Agricultural sustainability and intensive production practices, Nature, 418, 671, 10.1038/nature01014
Cassman, 2003, Meeting cereal demand while protecting natural resources and improving environmental quality, Annu. Rev. Environ. Resour., 28, 315, 10.1146/annurev.energy.28.040202.122858
Godfray, 2010, Food security: The challenge of feeding nine billion people, Science, 27, 812, 10.1126/science.1185383
Ray, D.K., Ramankutty, N., Mueller, N.D., West, P.C., and Foley, J.A. (2012). Recent patterns of crop yield growth and stagnation. Nat. Commun., 1–19.
Hazell, 2008, Drivers of change in global agriculture, Philos. Trans. R. Soc. Lond. B, 363, 495, 10.1098/rstb.2007.2166
Alexandratos, 1999, World food and agriculture: Outlook for the medium and longer term, PNAS, 96, 5908, 10.1073/pnas.96.11.5908
Gibbs, 2010, Tropical forests were the primary sources of new agricultural land in the 1980s and 1990s, PNAS, 107, 16732, 10.1073/pnas.0910275107
Tilman, 2001, Forecasting agriculturally driven global environmental change, Science, 292, 281, 10.1126/science.1057544
Arizpe, 2011, Food security and fossil energy dependence: An international comparison of the use of fossil energy in agriculture (1991–2003), Crit. Rev. Plant Sci., 30, 45, 10.1080/07352689.2011.554352
Alexandratos, N., and Bruinsma, J. (2012). World Agriculture: Towards 2030/2050: The 2012 Revision, FAO. Available online: http://www.fao.org/docrep/016/ap106e/ap106e.pdf.
Gerland, 2014, World population stabilization unlikely this century, Science, 346, 234, 10.1126/science.1257469
UN (United Nations) (2015). World Population Prospects—The 2015 Revision: Key Findings and Advance Tables, Department of Economic and Social Affairs—Population Division, United Nations. Available online: http://esa.un.org/unpd/wpp/publications/files/key_findings_wpp_2015.pdf.
Molden, D. (2007). Water for Food, Water for Life. A Comprehensive Assessment of Water Management in Agriculture, Earthscan. Available online: http://www.iwmi.cgiar.org/assessment/Publications/books.htm.
FAO (The Food and Agriculture Organization of the United Nations) (2011). The State of the World’s Land and Water Resources for Food and Agriculture (SOLAW)—Managing Systems at Risk, Earthscan. Available online: http://www.fao.org/docrep/017/i1688e/i1688e.pdf.
Grassini, 2012, Distinguishing between yield advances and yield plateaus in historical crop production trends, Nat. Commun., 4, 2918, 10.1038/ncomms3918
Peterson, E.W.F. (2009). A Billion Dollars a Day: The Economics and Politics of Agricultural Subsidies, John Wiley & Sons.
Thurow, R., and Kilman, S. (2009). Enough: Why the World’s Poorest Starve in an Age of Plenty, Public Affairs.
Stiglitz, J. (2002). Globalization and Its Discontents, W.W. Norton & Company.
Stiglitz, J. (2006). Making Globalization Work, Allen Lane.
Chambers, R. (1997). Whose Reality Counts?—Putting the First Last, Intermediate Technology Publications.
Collier, P. (2008). The Bottom Billion. Why the Poorest Countries Are Failing and What can be Done ABOUT It, Oxford University Press.
Perfecto, I., Vandermeer, J., and Wright, A. (2009). Nature’s Matrix: Linking Agriculture, Conservation and Food Sovereignty, Earthscan.
GRAIN (2014). Hungry for LAND, GRAIN. Available online: https://www.grain.org/article/entries/4929-hungry-for-land-small-farmers-feed-the-world-with-less-than-a-quarter-of-all-farmland.
Ramankutty, N., Evan, A.T., Monfreda, C., and Foley, J.A. (2008). Farming the planet: 1. Geographic distribution of global agricultural lands in the year 2000. Glob. Biogeochem. Cycles, 22.
Latham, J., Cumani, R., Rosati, I., and Bloise, M. (2014). FAO. Available online: http://www.fao.org/uploads/media/glc-share-doc.pdf.
DeFries, 2010, Deforestation driven by urban population growth and agricultural trade in the twenty-first century, Nature Geoscience, 3, 178, 10.1038/ngeo756
Global Footprint Network (2015). World Footprint: Do We Fit on the Planet?, Global Footprint Network. Available online: http://www.footprintnetwork.org/en/index.php/GFN/page/world_footprint/.
Fiala, 2008, Measuring sustainability: Why the ecological footprint is bad economics and bad environmental science, Ecol. Econ., 67, 519, 10.1016/j.ecolecon.2008.07.023
Giampietro, 2014, Footworking in circles. Reply to Goldfinger et al. (2014) “Footprint Facts and Fallacies: A Response to Giampietro and Saltelli (2014) Footprints to nowhere”, Ecol. Indic., 46, 260, 10.1016/j.ecolind.2014.06.019
FAO (The Food and Agriculture Organization of the United Nations) (2015). Soil Degradation, FAO. Available online: http://www.fao.org/soils-portal/soil-degradation-restoration/it/.
FAO (The Food and Agriculture Organization of the United Nations) (2015). Climate Change and Food Systems: Global Assessments and Implications for Food Security and Trade, FAO. Available online: http://www.fao.org/3/a-i4332e.pdf.
Tilman, 2011, Global food demand and the sustainable intensification of agriculture, PNAS, 108, 20260, 10.1073/pnas.1116437108
Bruinsma, J. (2011). By How Much do Land, Water and Crop Yields need to Increase by 2050?, FAO. Available online: ftp://ftp.fao.org/agl/aglw/docs/ResourceOutlookto2050.pdf.
Cassman, 1999, Ecological intensification of cereal production systems: Yield potential, soil quality, and precision agriculture, PNAS, 96, 5952, 10.1073/pnas.96.11.5952
FAO (The Food and Agriculture Organization of the United Nations) (2002). Towards 2015/2030 World Agriculture, FAO. Available online: ftp://ftp.fao.org/docrep/fao/004/y3557e/y3557e.pdf.
Lambin, 2013, Estimating the world’s potentially available cropland using a bottom-up approach, Glob. Environ. Chang., 23, 892, 10.1016/j.gloenvcha.2013.05.005
Nizeyimana, 2001, Assessing the impact of land conversion to urban use on soils of different productivity levels in the USA, Soil Sci. Soc. Am. J., 65, 391, 10.2136/sssaj2001.652391x
Smith, 2016, Global change pressures on soils from land use and management, Global Change Biolology, 22, 1008, 10.1111/gcb.13068
Bhattacharyya, 2015, Soil Degradation in India: Challenges and Potential Solutions, Sustainability, 7, 3528, 10.3390/su7043528
Tully, 2015, The State of Soil Degradation in Sub-Saharan Africa: Baselines, Trajectories, and Solutions, Sustainability, 7, 6523, 10.3390/su7066523
Wingeyer, 2015, Soil Quality Impacts of Current South American Agricultural Practices, Sustainability, 7, 2213, 10.3390/su7022213
Young, 1999, Is there really spare land? A critique of estimates of available cultivable land in developing countries, Environ. Dev. Sustain., 1, 3, 10.1023/A:1010055012699
Morgan, R.P.C. (2005). Soil Erosion and Conservation, Blackwell. [3rd ed.].
Lal, R., and Stewart, B.A. (2013). Principles of Sustainable Soil Management in Agroecosystems, CRC Press.
Bindraban, 2012, Assessing the impact of soil degradation on food production, Curr. Opin. Environ. Sustain., 4, 478, 10.1016/j.cosust.2012.09.015
Rekacewicz, P. Global Soil Degradation. UNEP/GRID-Arendal—From Collection: IAASTD—International Assessment of Agricultural Science and Technology for Development. Available online: http://www.grida.no/graphicslib/detail/global-soil-degradation_9aa7.
Lambin, 2011, Global land use change, economic globalization, and the looming land scarcity, PNAS, 108, 3465, 10.1073/pnas.1100480108
FAO (The Food and Agriculture Organization of the United Nations) (2015). What is Soil, FAO. Available online: http://www.fao.org/soils-portal/about/all-definitions/en/.
Lal, R., and Stewart, B.A. (2012). World Soil Resources and Food Security, CRC Press.
Oldeman, L.R., Hakkeling, R.T.A., and Sombroek, W.G. World Map of the Status of Human-induced Soil Degradation: An Explanatory Note, Second Revised Edition. ISRIC/UNEP. Available online: http://www.isric.org/sites/default/files/ExplanNote_1.pdf.
Lal, 2015, Restoring Soil Quality to Mitigate Soil Degradation, Sustainability, 7, 5875, 10.3390/su7055875
Shiferaw, B., Freeman, H.A., and Swinton, S.M. (2005). Natural Resource Management in Agriculture: Methods for Assessing Economic and Environmental Impacts, CABI.
Lal, R., and Stewart, B.A. (2012). World Soil Resources and Food Security, CRC Press.
Lambin, 2001, The causes of land-use and land-cover change: Moving beyond the myths, Glob. Environ. Chang., 11, 261, 10.1016/S0959-3780(01)00007-3
Barrett, 2015, The self-reinforcing feedback between low soil fertility and chronic poverty, Nat. Geosci., 8, 907, 10.1038/ngeo2591
Lal, R., and Stewart, B.A. (2012). World Soil Resources and Food Security, CRC Press.
Eitelberg, 2015, A review of global potentially available cropland estimates and their consequences for model-based assessments, Glob. Chang. Biol., 21, 1236, 10.1111/gcb.12733
Bai, 2008, Proxy global assessment of land degradation, Soil Use Manag., 24, 223, 10.1111/j.1475-2743.2008.00169.x
Pimentel, 2013, Soil erosion threatens food production, Agriculture, 3, 443, 10.3390/agriculture3030443
Hurni, 2015, Soils, agriculture and food security: The interplay between ecosystem functioning and human well-being, Curr. Opin. Environ. Sust., 15, 25, 10.1016/j.cosust.2015.07.009
Reynolds, 2007, Global desertification: building a science for dryland development, Science, 316, 847, 10.1126/science.1131634
Wood, S., Sebastian, K., and Scherr, S.J. (2000). Pilot Analysis of Global Ecosystems: Agroecosystems, International Food Policy Research Institute and World Resources Institute. Available online: http://www.wri.org/sites/default/files/pdf/page_agroecosystems.pdf.
Tainter, J. (1998). The Collapse of Complex Societies, Cambridge University Press.
Ziolkowski, A. (2000). Storia di Roma, Bruno Mondadori. (In Italian).
Ward-Perkins, B. (2005). The Fall of Rome and the End of Civilization, Oxford University Press.
Churchman, G.J., and Landa, E.R. (2014). The Soil Underfoot Infinite Possibilities for a Finite Resource, CRC Press.
Worster, D. (2004). Dust Bowl. The Southern Plains in the 1930s, Oxford University Press.
NOAA (The National Oceanic and Atmospheric Administration) (2016). Dust Storm Approaching Stratford, Texas, Available online: http://www.photolib.noaa.gov/bigs/theb1365.jpg.
USDA-Farm Service Agency (2016). Texas County, Oklahoma, Homestead and Field Struck by the 1930s Dust Bowl, Available online: http://www.fsa.usda.gov/Internet/FSA_Image/ok_754_1.jpg.
Bruinsma, J. (2003). World Agriculture: Towards 2015/2030. An FAO Perspective, Earthscan. Available online: ftp://ftp.fao.org/docrep/fao/005/y4252e/y4252e.pdf.
MEA (Millennium Ecosystem Assessment) (2005). Responses Assessment, World Resources Institute. Available online: http://www.millenniumassessment.org/en/Responses.html.
Mazoyer, M., and Roudart, L. (2006). The History of World Agriculture: From the Neolithic Age to the Present Crisis, Earthscan.
IAASTD (International Assessment of Agricultural Knowledge, Science and Technology for Development) (2009). Agriculture at the Crossroad—Synthesis Report, Island Press. Available online: http://apps.unep.org/publications/pmtdocuments/-Agriculture%20at%20a%20crossroads%20-%20Synthesis%20report-2009Agriculture_at_Crossroads_Synthesis_Report.pdf.
Daly, H.E. (2007). Ecological Economics and Sustainable Development, Selected Essays of Herman, Edward Elgar.
Daly, 2009, Incorporating Values in a Bottom-Line Ecological Economy, Bull. Sci. Technol. Soc., 29, 349, 10.1177/0270467609342702
Roberts, 1991, Academic panel split on greenhouse adaptation, Science, 253, 1206, 10.1126/science.253.5025.1206
Beckerman, W. (1997). Small is Stupid, Duckworth.
Martinez-Alier, J. (1987). Ecological Economics: Energy, Environment and Society, Basil Blackwell.
Munda, 1997, Environmental economics, ecological economics, and the concept of sustainable development, Environ. Values, 6, 213, 10.3197/096327197776679158
Munda, 1998, Weak comparability of values as a foundation for ecological economics, Ecol. Econ., 26, 277, 10.1016/S0921-8009(97)00120-1
Daly, H.E., and Farley, J. (2011). Ecological Economics: Principles and Application, Island Press. [2nd ed.].
Timmer, C.P. (2009). A World without Agriculture: The Structural Transformation in Historical Perspective, The AEI Press.
USDA (United States Department of Agriculture) (2013). Ag and Food Statistics: Charting the Essentials. United States Department of Agriculture—Economic Research Service, Available online: http://www.ers.usda.gov/data-products/ag-and-food-statistics-charting-the-essentials/ag-and-food-sectors-and-the-economy.aspx.
Wall, D.H. (2013). Soil Ecology and Ecosystem Services, Oxford University Press.
Sagoff, M. (2008). The Economy of the Earth, Cambridge University Press. [2nd ed.].
Sagoff, 2011, The quantification and valuation of ecosystem services, Ecol. Econ., 70, 497, 10.1016/j.ecolecon.2010.10.006
Leopold, A. (1949). A Sand County Almanac, Oxford University Press.
Altieri, M.A. (1987). Agroecology: The Science of Sustainable Agriculture, Westview Press.
Reganold, 1987, Long-term effects of organic and conventional farming on soil erosion, Nature, 330, 370, 10.1038/330370a0
Lampkin, N. (2002). Organic Farming, Old Pond Publishing. [Revised ed.].
Gomiero, 2013, Alternative land management strategies and their impact on soil conservation, Agriculture, 3, 464, 10.3390/agriculture3030464
Gomiero, 2011, Environmental impact of different agricultural management practices: Conventional vs. organic agriculture, Crit. Rev. Plant Sci., 30, 95, 10.1080/07352689.2011.554355
Cox, 2006, Prospects for developing perennial grain crops, Bioscience, 56, 649, 10.1641/0006-3568(2006)56[649:PFDPGC]2.0.CO;2
Glover, 2005, The necessity and possibility of perennial grain production systems, Renew. Agric. Food Syst., 20, 1, 10.1079/RAF200499
Glover, 2010, Harvested perennial grasslands provide ecological bench-marks for agricultural sustainability, Agric. Ecosyst. Environ., 137, 3, 10.1016/j.agee.2009.11.001
Glover, 2010, Increased food and ecosystem security via perennial grains, Science, 328, 1638, 10.1126/science.1188761
Bridges, E.M., Hannam, I.D., Oldeman, L.R., Pening de Vries, F.W.T., Scherr, S.J., and Sompatpanit, S. (1999, January 25–29). Land Degradation: An overview. Responses to Land Degradation, Proceedings of the 2nd International Conference on Land Degradation and Desertification, Khon Kaen, Thailand. Available online: http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/use/?cid=nrcs142p2_054028.
Lomas, 2010, The history of ecosystem services in economic theory and practice: From early notions to markets and payment schemes, Ecol. Econ., 69, 1209, 10.1016/j.ecolecon.2009.11.007
Power, 2010, Ecosystem services and agriculture: Tradeoffs and synergies, Philos. Trans. R. Soc. Lond. B, 365, 2959, 10.1098/rstb.2010.0143
Robertson, 2014, Farming for ecosystem services: An ecological approach to production agriculture, Bioscience, 64, 404, 10.1093/biosci/biu037
Churchman, G.J., and Landa, E.R. (2014). The Soil Underfoot Infinite Possibilities for a Finite Resource, CRC Press.
Mirzabaev, 2015, Economics of sustainable land management, Curr. Opin. Environ. Sustain., 15, 9, 10.1016/j.cosust.2015.07.004
Lugo, 2008, Ecosystem services, the millennium ecosystem assessment, and the conceptual difference between benefits provided by ecosystems and benefits provided by people, J. Land Use Environ. Law, 23, 1
Spangenberg, 2010, Precisely incorrect? Monetising the value of ecosystem services, Ecol. Complex., 7, 327, 10.1016/j.ecocom.2010.04.007
Montgomery, 2007, Soil erosion and agricultural sustainability, PNAS, 104, 13268, 10.1073/pnas.0611508104
Pinstrup-Andersen, P., Pandya-Lorch, R., and Rosegrant, M. (1999). World Food Prospects: Critical Issues for the Early Twenty-First Century, International Food Policy Research Institute. Available online: http://library.cgiar.org/bitstream/handle/10947/1622/world%20food.pdf?sequence=1].
Mauser, 2015, Global biomass production potentials exceed expected future demand without the need for cropland expansion, Nat. Commun., 6, 8946, 10.1038/ncomms9946
Fischer, G., Hizsnyik, E., Prieler, S., and Wiberg, D. (2011). Scarcity and Abundance of Land Resources: Competing Uses and the Shrinking Land Resource Base, FAO. Available online: http://www.fao.org/fileadmin/templates/solaw/files/thematic_reports/TR_02_light.pdf.
Alexandratos, N. (1995). World Agriculture: Towards 2010. An FAO Study, FAO. Available online: http://www.fao.org/docrep/v4200e/v4200e00.htm.
Ramankutty, 2002, The global distribution of cultivable lands: Current patterns and sensitivity to possible climate change, Glob. Ecol. Biogeogr., 11, 377, 10.1046/j.1466-822x.2002.00294.x
Palm, 2007, Soils: A Contemporary Perspective, Annu. Rev. Environ. Resour., 32, 99, 10.1146/annurev.energy.31.020105.100307
Beets, W.C. (1990). AgBe Publishing.
Chambers, R. (2008). Revolutions in Development Inquiry, Intermediate Technology Publications.
WB (The World Bank) Indicators. Available online: http://data.worldbank.org/indicator.
Stern, D.I. The Environmental Kuznets Curve; International Society for Ecological Economics Internet Encyclopedia of Ecological Economics: 2003. Available online: http://data.worldbank.org/indicator.
Stern, 2004, The rise and fall of the environmental Kuznets curve, World Dev., 32, 1419, 10.1016/j.worlddev.2004.03.004
Chambers, 2009, Taking the “U” out of Kuznets: A comprehensive analysis of the EKC and environmental degradation, Ecol. Econ., 68, 1149, 10.1016/j.ecolecon.2008.08.006
2013, Dynamite in the EKC tunnel? Inconsistencies in resource stock analysis under the environmental Kuznets curve hypothesis, Ecol. Econ., 94, 116, 10.1016/j.ecolecon.2013.07.015
Van Vliet, J., Magliocca, N.R., Büchner, B., Cook, E., Rey Benayas, J.M., Ellis, E.C., Heinimann, A., Keys, E., Lee, T.M., and Liu, J.M. (2015). Meta-studies in land use science: Current coverage and prospects. Ambio.
Cochrane, W.W. (1993). The Development of American Agriculture: A Historical Analysis, University of Minnesota Press. [2nd ed.].
Hurt, R.D. (2002). Ivan R. Dee.
Winders, B. (2009). The Politics of Food Supply: U.S. Agricultural Policy in the World Economy, Yale University Press.
HLPE (High Level Panel of Experts) (2013). Biofuels and Food Security, FAO. Available online: http://www.fao.org/fileadmin/user_upload/hlpe/hlpe_documents/HLPE_Reports/HLPE-Report-5_Biofuels_and_food_security.pdf.
Hall, C.A.S., Cleveland, C.J., and Kaufmann, R. (1992). Energy and Resource Quality, University of Colorado Press.
Hall, 2014, EROI of different fuels and the implications for society, Energy Policy, 64, 141, 10.1016/j.enpol.2013.05.049
Hall, C.A.S., and Klitgaard, K.A. (2012). Energy and the Wealth of Nations: Understanding the Biophysical Economy, Springer.
Pimentel, 2005, Ethanol production using corn, switchgrass, and wood: Biodiesel production using soybean and sunflower, Nat. Resour. Res., 14, 65, 10.1007/s11053-005-4679-8
Patzek, 2008, Thermodynamics of agricultural sustainability: The case of US maize agriculture, Crit. Rev. Plant Sci., 27, 272, 10.1080/07352680802247971
MacKay, D.J.C. (2009). Sustainable Energy—Without the Hot Air, UIT Cambridge Ltd.. Available online: http://www.withouthotair.com/download.html.
Giampietro, M., and Mayumi, K. (2009). The Biofuel Delusion: The Fallacy of Large Scale Agro-Biofuels Production, Earthscan.
Gomiero, 2015, Are biofuels an effective and viable energy strategy for industrialized societies? A reasoned overview of potentials and limits, Sustainability, 7, 8491, 10.3390/su7078491
Pimentel, 1991, Ethanol fuels: Energy security economics and the environment, J. Agric. Environ. Ethics, 4, 1, 10.1007/BF02229143
Pimentel, D. (2008). Biofuels, Solar and Wind as Renewable Energy Systems: Benefits and Risks, Springer.
Gerasimchuk, I., Bridle, R., Beaton, C., and Charles, C. (2012). The International Institute for Sustainable Development. Available online: http://www.iisd.org/gsi/sites/default/files/bf_stateplay_2012.pdf.
EPA (U.S. Environmental Protection Agency) (2016). Economics of Biofuels. National Center for Environmental Economics, Available online: http://yosemite.epa.gov/EE%5Cepa%5Ceed.nsf/webpages/Biofuels.html.
Sikdar, 2016, Impenetrable truth about fuel subsidies, Clean Technol. Environ. Policy, 18, 3, 10.1007/s10098-015-1078-7
U.S. Department of Energy (2016). Federal Laws and Incentives for Ethanol, Available online: http://www.afdc.energy.gov/fuels/laws/ETH/US.
U.S. Department of Energy (2016). Federal Laws and Incentives for Biodiesel, Available online: http://www.afdc.energy.gov/fuels/laws/BIOD/US.
Reboredo, 2016, The fall of oil prices and the effects on Biofuels, Trends Biotechnol., 34, 3, 10.1016/j.tibtech.2015.10.002
Fernandez-Cornejo, J., Wechsler, S., Livingston, M., and Mitchell, L. (2014). Genetically Engineered Crops in the United States, Available online: http://www.ers.usda.gov/publications/err-economic-research-report/err162.aspx.
GMO Compass USA: Cultivation of GM Plants. Available online: http://www.gmo-compass.org/eng/agri_biotechnology/gmo_planting/506.usa_cultivation_gm_plants_2013.html.
Coleman-Jensen, C., Nord, M., and Singh, A. (2014). Household Food Security in the United States in 2012, Available online: http://www.ers.usda.gov/publications/err-economic-research-report/err155.aspx.
Ogden, 2014, Prevalence of childhood and adult obesity in the United States, 2011–2012, J. Am. Med. Assoc., 311, 806, 10.1001/jama.2014.732
Fluck, R.C. (1992). Energy in Farm Production, Elsevier.
Cordell, 2014, Life’s Bottleneck: Sustaining the world’s phosphorus for a food secure future, Annu. Rev. Environ. Resour., 39, 16, 10.1146/annurev-environ-010213-113300
WEF (World Economic Forum) Global Risks 2011. 6th Edition. World Economic Forum, Cologne/Geneva. Available online: http://reports.weforum.org/wp-content/blogs.dir/1/mp/uploads/pages/files/global-risks-2011.pdf.
FAO (The Food and Agriculture Organization of the United Nations) (2014). Walking the Nexus Talk: Assessing the Water-Energy-Food Nexus in the Context of the Sustainable Energy for All Initiative, FAO. Available online: http://www.fao.org/3/a-i3959e.pdf.
UN-ESCAP (United Nations) (2014). Water, Food and Energy Nexus in Asia and the Pacific, United Nations. Available online: http://www.worldwatercouncil.org/fileadmin/world_water_council/documents/programs_hydropolitics_sdgs/Water-Food-Nexus%20Report.pdf.
IISD (The International Institute for Sustainable Development) 2013 (2013). The Water-Energy-Food Security Nexus: Towards a Practical Planning and Decision-Support Framework for Landscape Investment and Risk Management, IISD. Available online: http://www.iisd.org/pdf/2013/wef_nexus_2013.pdf.
Howells, 2013, Integrated analysis of climate change, land-use, energy and water strategies, Nat. Clim. Chang., 3, 621, 10.1038/nclimate1789
Allouche, J., Middleton, C., and Gyawal, D. (2014). Nexus Nirvana or Nexus Nullity? A Dynamic Approach to Security and Sustainability in the Water-Energy-Food Nexus, STEPS Centre. Available online: http://steps-centre.org/wp-content/uploads/Water-and-the-Nexus.pdf.
Giampietro, M., Aspinall, R.J., Ramos-Martin, J., and Bukkens, S.G.F. (2014). Routledge.
Howells, 2014, Water-energy nexus: Assessing integrated systems, Nat. Clim. Chang., 4, 246, 10.1038/nclimate2180
Stein, C., Barron, J., Nigussie, L., Gedif, B., Amsalu, T., and Langan, S. (2014). Advancing the Water-Energy-Food Nexus: Social Networks and Institutional Interplay in the Blue Nile, CGIAR Research Program on Water, Land and Ecosystems (WLE); International Water Management Institute (IWMI). Available online: http://www.sei-international.org/publications?pid=2573.
Dovers, 1995, Ignorance, the precautionary principle, and sustainability, Ambio, 24, 92
Giampietro, 2002, The precautionary principle and ecological hazards of genetically modified organisms, Ambio, 31, 466, 10.1579/0044-7447-31.6.466
Gomiero, 2006, Facing complexity on agroecosystems: A new approach to farming system analysis, Int. J. Agric. Resour. Gov. Ecol., 5, 116
Beck, U. (1998). Polity Press.
Lal, 2007, Evolution of the plow over 10,000 years and the rationale for no-till farming, Soil Tillage Res., 93, 1, 10.1016/j.still.2006.11.004
NRC (National Research Council of the National Academies) (2010). Toward Sustainable Agricultural Systems in the 21st Century, National Academies Press. Available online: http://www.nap.edu/read/12832/chapter/1.
Reganold, 2001, Sustainability of three apple production systems, Nature, 410, 926, 10.1038/35073574
Crowder, 2015, Financial competitiveness of organic agriculture on a global scale, PNAS, 112, 7611, 10.1073/pnas.1423674112
Berhe, 2007, The significance of the erosion-induced terrestrial carbon sink, BioScience, 57, 337, 10.1641/B570408
Quinton, 2010, The impact of agricultural soil erosion on biogeochemical cycling, Nature Geoscience, 3, 311, 10.1038/ngeo838
Bot, A. (2005). The Importance of Soil Organic Matter: Key to Drought-Resistant Soil and Sustained Food Production, FAO. Available online: http://www.fao.org/docrep/009/a0100e/a0100e00.htm#Contents.
Allison, F.E. (1973). Soil Organic Matter and Its Role in Crop Production, Elsevier.
Russell, 1977, The role of organic matter in soil fertility, Philos. Trans. R. Soc. Lond. B, 281, 209, 10.1098/rstb.1977.0134
Lal, 2010, Enhancing eco-efficiency in agro-ecosystems through soil carbon sequestration, Crop Sci., 50, 120, 10.2135/cropsci2010.01.0012
Friedrich, 2012, No-till farming and the environment: Do no-till systems require more chemicals, Outlooks Pest Manag., 23, 153, 10.1564/23aug02
Carr, 2013, Impacts of organic zero tillage systems on crops, weeds, and soil quality, Sustainability, 5, 3172, 10.3390/su5073172
Wall, D.H. (2013). Soil Ecology and Ecosystem Services, Oxford University Press.
Bedano, 2010, Negative effects of no-till on soil macrofauna and litter decomposition in Argentina as compared with natural grasslands, Soil Tillage Res., 110, 51, 10.1016/j.still.2010.06.008
Bedano, 2016, The adoption of no-till instead of reduced tillage does not improve some soil quality parameters in Argentinean Pampas, Appl. Soil Ecol., 98, 166, 10.1016/j.apsoil.2015.10.014
Powlson, 2014, Limited potential of no-till agriculture for climate change mitigation, Nat. Clim. Chang., 4, 678, 10.1038/nclimate2292
Tuomisto, 2012, Does organic farming reduce environmental impacts? A meta-analysis of European research, J. Environ. Manag., 112, 309, 10.1016/j.jenvman.2012.08.018
Lal, R., and Stewart, B.A. (2013). Principles of Sustainable Soil Management in Agroecosystems, CRC Press.
Gomiero, T. (2016). Organic and conventional agriculture: Issues in productivity, energy and efficiency comparison, in preparation.
Pretty, 2008, Agricultural sustainability: Concepts, principles and evidence, Philos. Trans. R. Soc. Lond. B, 363, 447, 10.1098/rstb.2007.2163
Jackson, W. (1980). New Roots for Agriculture, University of Nebraska Press.
Jackson, 2002, Natural systems agriculture: A truly radical alternative, Agric. Ecosyst. Environ., 88, 111, 10.1016/S0167-8809(01)00247-X
Pimentel, 2012, Annual vs. perennial grain production, Agric. Ecosyst. Environ., 161, 1, 10.1016/j.agee.2012.05.025
Nestle, M. (2007). Food Politics: How the Food Industry Influences Nutrition and Health, University of California Press. [2nd ed.].
Lang, T., Barling, D., and Caraher, M. (2009). Food Policy: Integrating Health, Environment and Society, Earthscan.
Lang, T., and Heasman, M. (2015). Food Wars: The Global Battle for Mouths, Minds and Markets, Earthscan. [2nd ed.].
Robinson, G.M., and Carson, D.A. (2015). Handbook on the Globalization of Agriculture, Edward Elgar.
Maass Wolfenson, K.D. (2012). Coping with the Food and Agriculture Challenge: Smallholders’ Agenda, FAO. Available online: http://www.fao.org/fileadmin/templates/nr/sustainability_pathways/docs/Coping_with_food_and_agriculture_challenge__Smallholder_s_agenda_Final.pdf.
Stuart, T. (2009). Waste: Uncovering the Global Food Scandal, Penguin Books.
FAO (The Food and Agriculture Organization of the United Nations) (2011). Global Food Loses and Food Waste: Extent, Causes and Prevention. Study Conducted for the International Congress SAVE FOOD!, FAO. Available online: http://www.fao.org/docrep/014/mb060e/mb060e.pdf.