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Approaches to Reinforce Crop Productivity Under Rain-fed Conditions in Sub-humid Environments in Sub-Saharan Africa

  • Regis ChikowoEmail author
  • Shamie Zingore
  • Justice Nyamangara
  • Mateete Bekunda
  • Joseph Messina
  • Sieglinde Snapp
Chapter

Abstract

Smallholder farming in much of Sub-Saharan Africa is rain-fed and thus exposed to rainfall variability. Among the climate variables, rainfall is projected to decline and have an overriding effect on crop productivity. With little opportunity for supplementary irrigation for the majority of farmers, a plausible strategy to maintain crop production under water-limited conditions includes balanced nutrient management for enhancing efficiency of use of limited soil water. Co-application of judicious rates of organic and mineral nutrient resources, particularly including the use of phosphorus (P) on P-limited soils, will facilitate development of an extensive crop rooting system for efficient exploration and capture of soil water, especially at a depth >0.8 m. This chapter explores case studies across Eastern and Southern Africa where various soil water conservation and nutrient management approaches have been used to gain ‘extra miles’ with limited available soil water. Firstly, an approach is described that varies nitrogen (N) fertilizer application across growing seasons, by adjusting N application rates to match current season rainfall trends. The approach offers opportunities for farmers to increase crop productivity to >6 t ha−1 in high agro-potential areas, compared to a ceiling of 4.5 t ha−1 for the fixed fertilization model, while minimizing economic losses due to investments in N fertilizer during drought years. Secondly, we deal with the subject of fertilization across nutrient gradients, where a poor agronomic N use efficiency of <18 kg grain kg−1 of applied N is demonstrated for soils with <0.4 % organic carbon, compared with >35 kg grain kg−1 of N applied when soil organic carbon >0.5 %. Thirdly, the conservation agriculture (CA)-nutrient management nexus is examined, where maize yields in farmers’ fields with CA alone were barely 0.5 t ha−1 compared to an average of 2.5 t ha−1 for CA combined with fertilizers. Fourthly, a novel system that involves intercropping two legumes with contrasting phenology for enhanced cropping system functioning is described. Finally, an approach that can be used for co-learning with farmers on soil fertility management principles for risk management is presented. The data lead to the conclusion that the ‘doubled-up’ legumes system results in reduced fertilizer requirements for cereal crops grown in sequence, which benefits yield stability over time. Variable use of N fertilizer according to season quality and more tailored targeting of nutrients are vital for profitable investments in fertilizers in Africa. The Africa RISING project in Eastern and Southern Africa is currently harnessing some of these principles as vehicles for intensification of smallholder farming systems.

Keywords

Droughts Nutrient use efficiency Soil nutrients Water productivity Maize 

Notes

Acknowledgements

The authors gratefully acknowledge funding from USAID through the Africa RISING program being implemented by the International Institute of Tropical Agriculture (IITA). Data for case studies that constitute this chapter are a result of funding from the International Plant Nutrition Institute (IPNI), IDRC, ICRISAT, and the McKnight Foundation.

References

  1. Bayala J, Sileshi GW, Coe R, Kalinganire A, Tchoundjeu Z, Sinclair FD, Garrity D (2012) Cereal yield response to conservation agriculture practices in drylands of West Africa: a quantitative synthesis. J Arid Environ 78:13–25CrossRefGoogle Scholar
  2. Cadisch G, de Willigen P, Suprayogo D, Mobbs DC, van Noordwijk M, Rowe EC (2004) Catching and competing for mobile nutrients in soils. In: van Noordwijk M, Cadisch G, Ong CK (eds) Below-ground interactions in tropical agroecosystems: concepts and models with multiple plant components. CAB International, Wallingford, pp 171–191Google Scholar
  3. Chikowo R, Mapfumo P, Nyamugafata P, Giller KE (2004) Maize productivity and mineral N dynamics following different soil fertility management technologies on a depleted sandy soil in Zimbabwe. Agric Ecosyst Environ 102:119–131CrossRefGoogle Scholar
  4. Fofana B, Tamelokpo A, Wopereis MC, Breman H, Dzotsi K, Carsky RJ (2005) Nitrogen use efficiency by maize as affected by a mucuna short fallow and P application in the coastal savanna of West Africa. Nutr Cycl Agroecosyst 71:227–237CrossRefGoogle Scholar
  5. Giller KE, Rowe EC, de Ridder N, van Keulen H (2006) Resource use dynamics and interactions in the tropics: scaling up in space and time. Agric Syst 88:8–27CrossRefGoogle Scholar
  6. Giller KE, Witter E, Corbeels M, Tittonell P (2009) Conservation agriculture and smallholder farming in Africa: the heretics’ view. Field Crop Res 114:23–34CrossRefGoogle Scholar
  7. Giller KE, Tittonell P, Rufino MC, Wijk MT et al (2011) Communicating complexity: integrated assessment of trade-offs concerning soil fertility management within African farming systems to support innovation and development. Agric Syst 104:191–203CrossRefGoogle Scholar
  8. Haggblade S, Tembo G (2003) Development, diffusion and impact of conservation farming in Zambia, Working Paper No. 8. Food Security Research Project, Lusaka, Zambia, p 76Google Scholar
  9. IPCC (2007) Climate change: impacts, adaptation and vulnerability. Fourth Assessment Report (AR4) of the United Nations Intergovernmental Panel on Climate Change (IPCC). Cambridge University Press, CambridgeGoogle Scholar
  10. Janssen BH (1998) Efficient use of nutrients: an art of balancing. Field Crop Res 56:197–201CrossRefGoogle Scholar
  11. Janssen BH, Guiking FC, van der Eijk D, Smaling EM, Wolf J, Van Reuler H (1990) A system for quantitative evaluation of tropical soils (QUEFTS). Geoderma 46:299–318CrossRefGoogle Scholar
  12. Kho RM (2000) On crop production and the balance of available resources. Agric Ecosyst Environ 80:71–85CrossRefGoogle Scholar
  13. Manlay RJ, Chotte JL, Masse D, Laurent JY, Feller C (2002) Carbon, nitrogen and phosphorus allocation in agro-ecosystems of a West African savanna. III. Plant and soil components under continuous cultivation. Agric Ecosyst Environ 88:249–269CrossRefGoogle Scholar
  14. Marongwe LS, Kwazira K, Jenrich M, Thierfelder C, Kassam A, Friedrich T (2011) An African success: the case of conservation agriculture in Zimbabwe. Int J Agric Sustain 9:153–161CrossRefGoogle Scholar
  15. Masvaya EN, Nyamangara J, Nyawasha RW, Zingore S, Delve RJ, Giller KE (2010) Effect of farmer management strategies on spatial variability of soil fertility and crop nutrient uptake in contrasting agro-ecological zones in Zimbabwe. Nutr Cycl Agroecosyst 88:111–120CrossRefGoogle Scholar
  16. Mazvimavi D (2010) Investigating changes over time of annual rainfall in Zimbabwe. Hydrol Earth Syst Sci 14:2671–2679CrossRefGoogle Scholar
  17. Mtambanengwe F, Mapfumo P (2005) Organic matter management as an underlying cause for soil fertility gradients on smallholder farms in Zimbabwe. Nutr Cycl Agroecosyst 73:227–233CrossRefGoogle Scholar
  18. Nandwa SM (2001) Soil organic carbon (SOC) management for sustainable productivity of cropping and agro-forestry systems in Eastern and Southern Africa. Nutr Cycl Agroecosyst 61:143–158CrossRefGoogle Scholar
  19. Ncube B, Dimes JP, Twomlow SJ, Mupangwa W, Giller KE (2007) Raising the productivity of smallholder farms under semi-arid conditions by use of small doses of manure and nitrogen: a case of participatory research. Nutr Cycl Agroecosyst 77:53–67CrossRefGoogle Scholar
  20. Ndlovu PV, Mazvimavi K, An H, Murendo C (2013) Productivity and efficiency analysis of maize under conservation agriculture in Zimbabwe. Agric Syst. doi: 10.1016/j.agsy.2013.10.004 Google Scholar
  21. Nyagumbo I (1999) Conservation tillage for sustainable crop production systems – experiences from on-station and on-farm research in Zimbabwe (1997–1998). In: Kaumbutho PG, Simalenga TE (eds) Conservation tillage with animal traction. ATNESA, HarareGoogle Scholar
  22. Nyamangara J, Nyengerai K, Masvaya EN, Tirivavi R, Mashingaidze N, Mupangwa W, Dimes J, Hove L, Twomlow S (2013) Effect of conservation agriculture on maize yield in the semi-arid areas of Zimbabwe. Exp Agric. doi: 10.1017/S0014479713000562 Google Scholar
  23. Piha MI (1993) Optimizing fertilizer use and practical rainfall capture in a semi arid environment with variable rainfall. Exp Agric 29:405–415CrossRefGoogle Scholar
  24. Prudencio CY (1993) Ring management of soils and crops in the West African semi-arid tropics: the case of the Mossi farming system in Burkina Faso. Agric Ecosyst Environ 47:237–264CrossRefGoogle Scholar
  25. Rusinamhodzi L, Corbeels M, van Wijk MT, Rufino MC, Nyamangara J, Giller KE (2011) A meta-analysis of long-term effects of conservation agriculture practices on maize grain yield under rain-fed conditions: lessons from southern Africa. Agron Sustain Dev 31:1–17CrossRefGoogle Scholar
  26. Sanchez PA, Sherperd KD, Soule MJ, Place FM, Buresh RJ, Izac AM, Mokunywe AU, Kwesiga FR, Ndiritu CG, Woomer PL (1997) Soil fertility replenishment in Africa: an investment in natural resource capital. In: Buresh RJ, Sanchez PA, Calhoun F (eds) Replenishing soil fertility in Africa, SSSA Spec Publ 51. ASA/SSSA, MadisonGoogle Scholar
  27. Smaling EMA, Nandwa SM, Janseen BH (1997) Soil fertility in Africa is at stake. In: Buresh RJ, Sanchez PA, Calhoun F (eds) Replenishing soil fertility in Africa, SSSA Spec Publ 51. ASA/SSSA, Madison, pp 47–61Google Scholar
  28. Snapp SS, Blackie MJ, Gilbert RA, Bezner-Kerr R, Kanyama-Phiri GY (2010) Biodiversity can support a greener revolution in Africa. Proc Natl Acad Sci U S A 107:20840–20845CrossRefGoogle Scholar
  29. Tittonell P, Vanlauwe B, Leffelaar PA, Rowe EC, Giller KE (2005) Exploring diversity in soil fertility management of smallholder farms in Western Kenya. I. Heterogeneity of region and farm scale. Agric Ecosyst Environ 110:149–165CrossRefGoogle Scholar
  30. Tittonell PA, Muriuki A, Klapwijk CJ, Shepherd KD, Coe R, Vanlauwe B (2013) Soil heterogeneity and soil fertility gradients in smallholder agricultural systems of the East African highlands. Soil Sci Soc Am J 77:525–538CrossRefGoogle Scholar
  31. Umar BB, Aune JB, Johnsen FH, Lungu OI (2011) Options for improving smallholder conservation agriculture in Zambia. J Agric Sci 3:50–62Google Scholar
  32. Vanlauwe B, Diels J, Lyasse O, Aihou K, Iwuafor EN, Sanginga N, Deckers J (2002) Fertility status of soils of the derived savanna and northern Guinea savanna and response to major plant nutrients as influenced by soil type and land use management. Nutr Cycl Agroecosyst 62:139–150CrossRefGoogle Scholar
  33. Vanlauwe B, Wendt J, Giller K et al (2014) A fourth principle is required to define conservation agriculture in Sub-Saharan Africa: the appropriate use of fertilizer to enhance crop productivity. Field Crop Res 155:10–13CrossRefGoogle Scholar
  34. Wall PC, Thierfelder C, Ngwira A, Govaerts B, Nyagumbo I, Baudron F (2013) Conservation agriculture in Eastern and Southern Africa. In: Jat RA, Graziano de Silva J (eds) Conservation agriculture: global prospects and challenges. CABI, WallingfordGoogle Scholar
  35. Wopereis MC, Tamelokpo A, Ezui K, Gnakpenou D, Fofana B, Breman H (2006) Mineral fertilizer management of maize on farmer fields differing in organic inputs in the West African Savanna. Field Crop Res 96:355–362CrossRefGoogle Scholar
  36. Zingore S, Murwira HK, Delve RJ, Giller KE (2007) Influence of nutrient management strategies on variability of soil fertility, crop yields and nutrient balances on smallholder farms in Zimbabwe. Agric Ecosyst Environ 119:112–126CrossRefGoogle Scholar
  37. Zingore S, Tittonell P, Corbeels M, Wijk MT, Giller KE (2011) Managing soil fertility diversity to enhance resource use efficiencies in smallholder farming systems: a case from Murehwa District, Zimbabwe. Nutr Cycl Agroecosyst 90:87–103CrossRefGoogle Scholar

Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • Regis Chikowo
    • 1
    • 2
    Email author
  • Shamie Zingore
    • 3
  • Justice Nyamangara
    • 4
  • Mateete Bekunda
    • 5
  • Joseph Messina
    • 6
  • Sieglinde Snapp
    • 1
  1. 1.Plant Soil and Microbial Sciences DepartmentMichigan State UniversityEast LansingUSA
  2. 2.Crop Science DepartmentUniversity of ZimbabweHarareZimbabwe
  3. 3.International Plant Nutrition Institute (IPNI), Africa ProgramNairobiKenya
  4. 4.International Crops Research Institute for the Semi-Arid Tropics (ICRISAT)BulawayoZimbabwe
  5. 5.International Institute of Tropical Agriculture (IITA)ArushaTanzania
  6. 6.Department of GeographyMichigan State UniversityEast LansingUSA

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