Agriculture and Human Values

, Volume 32, Issue 1, pp 111–118 | Cite as

Facing food insecurity in Africa: Why, after 30 years of work in organic agriculture, I am promoting the use of synthetic fertilizers and herbicides in small-scale staple crop production

Discussion piece

Abstract

Food insecurity and the loss of soil nutrients and productive capacity in Africa are serious problems in light of the rapidly growing African population. In semi-arid central Tanzania currently practiced traditional crop production systems are no longer adaptive. Organic crop production methods alone, while having the capacity to enable food security, are not feasible for these small-scale farmers because of the extra land, skill, resources, and 5–7 years needed to benefit from them—particularly for maize. Maize, grown by 94 % of farmers, has substantial nitrogen needs. The most practical ways of satisfying maize nutrient needs is via integrated soil fertility management, a combination of organic and Green Revolution methods. Maize has been shown in research to outyield the indigenous crops millet and sorghum in nearly all situations including drought. Conservation Agriculture (CA) in Africa has two main categories—organic and herbicide-mediated. The organic version of CA, despite years of promotion, has had a low rate of adoption. Herbicide-mediated zero tillage CA via backpack sprayer can substantially increase conventional maize yields while at the same time nearly eliminating erosion and increasing rainwater capture up to fivefold. Glyphosate herbicide is a non-proprietary product produced in Africa and approved for small farm use. The systemic nature of glyphosate allows the killing of perennial grasses that would otherwise need deep plowing to kill. The rooted weed residues protect the soil from erosion. The risks of glyphosate use are substantially outweighed by the benefits of increased food security and crop system sustainability.

Keywords

Africa food security Africa agriculture Sustainable intensification Integrated soil fertility management Zero tillage Organic agriculture 

References

  1. AGRA. 2013. Africa Agriculture Status Report: Focus on Staple Crops. Alliance for a Green Revolution in Africa (AGRA). Nairobi, Kenya. www.agra-alliance.org. Accessed 18 July 2014.
  2. Andersson, J.A., and K.E. Giller. 2012. On heretics and God’s blanket salesmen: Contested claims for Conservation Agriculture and the politics of its promotion in African smallholder farming. In Contested agronomy: Agricultural research in a changing world, ed. J. Sumberg, and J. Thompson. London: Earthscan.Google Scholar
  3. Andersson, J.A., and S. D’Souza. 2014. From adoption claims to understanding farmers and contexts: a literature review of Conservation Agriculture (CA) adoption among smallholder farmers in southern Africa. Agriculture, Ecosystems & Environment 187: 116–132.CrossRefGoogle Scholar
  4. Auge, R.M. 2001. Water relations, drought and vesicular-arbuscular mycorrhizal symbiosis. Mycorrhiza 11: 3–42.CrossRefGoogle Scholar
  5. Badgley, C., J. Moghtader, E. Quintero, E. Zakem, M.J. Chappell, K. Aviles-Vazquez, A. Samulon, and I. Perfecto. 2007. Organic agriculture and the global food supply. Renewable Agriculture and Food Systems 22(2): 86–108.CrossRefGoogle Scholar
  6. Brau, J.C., and G.M. Woller. 2004. Microfinance: A comprehensive review of the existing literature. Journal of Entrepreneurial Finance 9(1): 1–27.Google Scholar
  7. Delate, Kathleen. 2009. Organic Grains, Oilseeds, and Other Specialty Crops. In Organic Farming: The Ecological System, ed. Charles Francis. Monograph #54 American Society of Agronomy.Google Scholar
  8. Derpsch, R., T. Friedrich, A. Kassam, and L. Hongwen. 2010. Current status of adoption of no-till farming in the world and some of its main benefits. International Journal Agricultural & Biological Engineering 3(1): 1–25.Google Scholar
  9. Douds Jr, D., L. Galvez, R. Janke, and P. Wagoner. 1995. Effect of tillage and farming system upon populations and distribution of vesicular-arbuscular mycorrhizal fungi. Agriculture, Ecosystems & Environment 52: 111–118.CrossRefGoogle Scholar
  10. EPA. 1993. Registration Decision Fact Sheet for Glyphosate (EPA-738-F-93-011) R.E.D. FACTS. United States Environmental Protection Agency.Google Scholar
  11. FAO, Undated. Conservation agriculture. In Optimizing soil moisture for plant production. FAO Soils Bulletin #79. Food and Agriculture Organization, United Nations.Google Scholar
  12. Fowler, R. 2000. Animal-drawn herbicide applicators for use in smallscale farmer weed control systems. In Animal power for weed control. A resource book of the Animal Traction Network for Eastern and Southern Africa (ATNESA), ed. P. Starkey and T. Simalenga, The Netherlands: Technical Centre for Agricultural and Rural Cooperation (CTA), Wageningen. ISBN 92-9081-136-6.Google Scholar
  13. Giller, K., E. Witter, M. Corbeels, and P. Tittonell. 2009. Conservation agriculture and smallholder farming in Africa: The heretics’ view. Field Crops Research 114(1): 23–34.CrossRefGoogle Scholar
  14. Global Harvest Initiative. 2013. Global Agricultural Productivity Report. Global Harvest Initiative. Washington D.C. http://www.globalharvestinitiative.org/index.php/media-resources/studies-reports/. Accessed 18 July 2014.
  15. Government of Tanzania. 2012. National Sample Census of Agriculture: Regional Report—Dodoma Region.Google Scholar
  16. Hartzler, B. 2005. Iowa Glyphosate Resistance in the Cornbelt. State University Dept. of Agronomy Extension publication. December 22. http://www.weeds.iastate.edu/mgmt/2005/pennpaper.shtml Accessed 10 Jan 2014.
  17. IIRR and ACT. 2005. Conservation agriculture: A manual for farmers and extension workers in Africa. International Institute of Rural Reconstruction, Nairobi: African Conservation Tillage Network, Harare. ISBN 9966-9705-9-2.Google Scholar
  18. LEAT. 2011. Land Acquisitions for Agribusiness in Tanzania: Prospects and Challenges. Lawyers’ Environmental Action Team (LEAT) General Publication. Tanzania. http://landwise.landesa.org/record/380.
  19. Lusekelo, P. 2013. Chainsaws massacre Tanzania`s green cover. The Guardian (Tanzania) 28 September.Google Scholar
  20. Kang, B.T. 1993. Potential for sustainable agroforestry and alley farming in tropical Africa. In Soil tillage in Africa: needs and challenges. FAO SOILS BULLETIN 69. ISBN 92-5-103442-7.Google Scholar
  21. Keyworth, M. 2013. The challenges of boosting Tanzania’s rice production. BBC News. 23 December. http://www.bbc.com/news/business. Accessed 18 July 2014.
  22. Montpellier Panel. 2013. Sustainable Intensification: A New Paradigm for African Agriculture. London. http://www.ag4impact.org. Accessed 18 July 2014.
  23. Mortensen, D., J. Egan, B. Maxwell, M. Ryan, and R. Smith. 2012. Navigating a critical juncture for sustainable weed management. BioScience 62(1): 75–84.CrossRefGoogle Scholar
  24. Mosha, T. 2013. Nutrition of women of child-bearing age and young children. Presentation at Feed the Future Food Security Innovation Labs Collaborative Research Programs (CRSP) Council Meeting “Examining Opportunities for Linkages in Collaborative Research, Technology Dissemination and Human Institutional Capacity Development.” Morogoro, Tanzania, 7 March.Google Scholar
  25. Mweta, N. 2013. Mapping out factors of conservation agriculture. The Guardian (Tanzania) 7 December.Google Scholar
  26. Ngwira, A., C. Thierfelder, and D. Lambert. 2013. Conservation agriculture systems for Malawian smallholder farmers: long-term effects on crop productivity, profitability and soil quality. Journal of Renewable Agriculture & Food Systems 28(4): 350–363.CrossRefGoogle Scholar
  27. Oakland Institute. 2011. Understanding land investment deals in Africa: Agrisol Energy and Pharos Global Agriculture Fund’s land deal in Tanzania. Land Deal Brief. http://www.oaklandinstitute.org. Accessed 18 July 2014.
  28. Poladian, C. 2013. Agrochemicals Linked To Higher Cancer, Birth Defect Rates In Some Argentine Provinces: Report. International Business Times. 20 October.Google Scholar
  29. Pretty, J. 2006. Agroecological Approaches to Agricultural Development. World Bank, Washington, DC. https://openknowledge.worldbank.com/handle/10986/9044 Accessed 7 Aug 2014.
  30. Pretty, J. 1997. The sustainable intensification of agriculture. Natural Resources Forum 21(4): 247–256.CrossRefGoogle Scholar
  31. Rufino, M., P. Tittonell, M. van Wijk, A. Castellanos-Navarrete, R. Delve, N. de Ridder, and K. Giller. 2007. Manure as a key resource within smallholder farming systems: analysing farm-scale nutrient cycling efficiencies with the NUANCES framework. Livestock Science 112: 273–287.CrossRefGoogle Scholar
  32. Rurinda, J., P. Mapfumo, M. van Wijk, F. Mtambanengwe, M. Rufino, R. Chikowo, and K. Giller. 2014. Comparative assessment of maize, finger millet and sorghum for household food security in the face of increasing climatic risk. European Journal of Agronomy 55: 29–41.CrossRefGoogle Scholar
  33. Rigby, P. 1969. Cattle and Kinship among the Gogo: A Semi-pastoral Society of Central Tanzania. Ithaca & London: Cornell University Press.Google Scholar
  34. Rowhani, P., D. Lobell, M. Linderman, and N. Ramankutty. 2011. Climate variability and crop production in Tanzania. Agricultural and Forest Meteorology 151(4): 449–460.CrossRefGoogle Scholar
  35. Sanchez, J., T. Wilson, K. Kizilkay, E. Parker, and R. Harwood. 2001. Enhancing the mineralizable nitrogen pool through substrate diversity in long term cropping systems. Soil Science Society of America Journal 65: 1442–1447.CrossRefGoogle Scholar
  36. Sanchez, P. and C. Palm. 1996. Nutrient cycling and agroforestry in Africa. Unasylva No. 185—Forest influences. Forestry Department, FAO.Google Scholar
  37. Schiffman, R. 2013. Multinationals carving up Africa for food. Canberra Times: Australia.Google Scholar
  38. Séralini, G., E. Claira, R. Mesnage, S. Gress, N. Defarge, M. Malatesta, D. Hennequin, and J. de Vendômois. 2014. Republished study: Long-term toxicity of a Roundup herbicide and a Roundup-tolerant genetically modified maize. Environmental Sciences Europe 26: 14. doi:10.1186/s12302-014-0014-5.CrossRefGoogle Scholar
  39. Shetto, R. and M. Owenya. 2007. Conservation agriculture as practised in Tanzania: three case studies. Nairobi. African Conservation Tillage Network, Centre de Coopération Internationale de Recherche Agronomique pour le Développement, Food and Agriculture Organization of the United Nations.Google Scholar
  40. Smaling, E., S. Nandwa, and B. Janssen. 1997. Soil fertility in Africa is at stake! In Recapitalization of soil nutrient capital in sub-Saharan Africa, ed. R. Buresh, P. Sanchez, and F. Calhoun, 47–61. CSSA, SSSA, Madison, Wisconsin: American Society of Agronomy.Google Scholar
  41. Swai, E. 2014. Personal communication. Hombolo, Dodoma Region, Tanzania: Principal Agricultural Research Officer, Tanzania Agricultural Research Institute.Google Scholar
  42. Thierfelder, C., and P. Wall. 2010. Investigating conservation agriculture (CA) systems in Zambia and Zimbabwe to mitigate future effects of climate change. Journal of Crop Improvement 24(2): 113–121.CrossRefGoogle Scholar
  43. Thiombiano, L., and M. Meshack. 2009. Scaling-up conservation agriculture in Africa: Strategy and approaches. Addis Ababa: FAO Subregional Office for Eastern Africa.Google Scholar
  44. Tilman, D. 1998. The greening of the green revolution. Nature 396: 211–212.CrossRefGoogle Scholar
  45. Umar, B. 2013. A critical review and re-assessment of theories of smallholder decision-making: a case of conservation agriculture households Zambia. Renewable Agriculture and Food Systems 29(3): 277–290.CrossRefGoogle Scholar
  46. UNEP-UNCTAD Capacity-building Task Force on Trade, Environment and Development. 2008. Organic Agriculture and Food Security in Africa. United Nations Conference on Trade and Development United Nations Environment Programme United Nations New York and Geneva.Google Scholar
  47. USAID Tanzania. 2011. Improving child and maternal nutrition in Tanzania. USAID Feed the Future. Draft RFA for consultation. Issuance date April 8, 2011.Google Scholar
  48. van der Velde, M., C. Folberth, J. Balkovič, P. Ciais, S. Fritz, I. Janssens, M. Obersteiner, L. See, R. Skalský, W. Xiong, and J. Peñuelas. 2014. African crop yield reductions due to increasingly unbalanced nitrogen and phosphorus consumption. Global Change Biology 20: 1278–1288.CrossRefGoogle Scholar
  49. Vanlauwe, B., A. Bationo, J. Chianu, K. Giller, R. Merckx, U. Mokwunye, O. Ohiokpehai, P. Pypers, R. Tabo, K. Shepherd, E. Smaling, and P. Woomer. 2010. Integrated soil fertility management: operational definition and consequences for implementation and dissemination. Outlook on Agriculture 39(1): 17–24.CrossRefGoogle Scholar
  50. Vanlauwe, B., J. Wendt, K. Giller, M. Corbeels, B. Gerard, and C. Nolte. 2014. A fourth principle is required to define Conservation Agriculture in sub-Saharan Africa: The appropriate use of fertilizer to enhance crop productivity. Field Crops Research 155: 10–13.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  1. 1.Institute of Development StudiesSt. John’s University of TanzaniaDodomaTanzania

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