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
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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.
KeywordsAfrica food security Africa agriculture Sustainable intensification Integrated soil fertility management Zero tillage Organic agriculture
- 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.
- 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
- 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
- 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
- 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
- EPA. 1993. Registration Decision Fact Sheet for Glyphosate (EPA-738-F-93-011) R.E.D. FACTS. United States Environmental Protection Agency.Google Scholar
- FAO, Undated. Conservation agriculture. In Optimizing soil moisture for plant production. FAO Soils Bulletin #79. Food and Agriculture Organization, United Nations.Google Scholar
- 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
- 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.
- Government of Tanzania. 2012. National Sample Census of Agriculture: Regional Report—Dodoma Region.Google Scholar
- 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.
- 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
- 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.
- Lusekelo, P. 2013. Chainsaws massacre Tanzania`s green cover. The Guardian (Tanzania) 28 September.Google Scholar
- 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
- 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.
- Montpellier Panel. 2013. Sustainable Intensification: A New Paradigm for African Agriculture. London. http://www.ag4impact.org. Accessed 18 July 2014.
- 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
- Mweta, N. 2013. Mapping out factors of conservation agriculture. The Guardian (Tanzania) 7 December.Google Scholar
- 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.
- Poladian, C. 2013. Agrochemicals Linked To Higher Cancer, Birth Defect Rates In Some Argentine Provinces: Report. International Business Times. 20 October.Google Scholar
- Pretty, J. 2006. Agroecological Approaches to Agricultural Development. World Bank, Washington, DC. https://openknowledge.worldbank.com/handle/10986/9044 Accessed 7 Aug 2014.
- 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
- Rigby, P. 1969. Cattle and Kinship among the Gogo: A Semi-pastoral Society of Central Tanzania. Ithaca & London: Cornell University Press.Google Scholar
- Sanchez, P. and C. Palm. 1996. Nutrient cycling and agroforestry in Africa. Unasylva No. 185—Forest influences. Forestry Department, FAO.Google Scholar
- Schiffman, R. 2013. Multinationals carving up Africa for food. Canberra Times: Australia.Google Scholar
- 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
- 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
- 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
- Swai, E. 2014. Personal communication. Hombolo, Dodoma Region, Tanzania: Principal Agricultural Research Officer, Tanzania Agricultural Research Institute.Google Scholar
- 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
- 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
- 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
- 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
- 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