Agroforestry Systems

, Volume 40, Issue 1, pp 19–27 | Cite as

The alley farming index: Preliminary steps towards a more realistic model

  • B. C. Blair


This paper presents the Alley Farming Index (AFI), a modification of the replacement value of the intercrop (RVI) index. The RVI index is used to assist in determining the ecological and economic benefits of a polyculture system and is potentially useful in intercropping situations where only annual crops are utilized. Alley farming is a modification of the alley cropping system where food crops are planted in between, regularly pruned, widely spaced trees. Unlike the RVI index the modified equation, presented here, accommodates alley farming where perennials and the amount of tree prunings used as green manure are important parameters. The AFI is presented in two forms, one that assumes a linear relationship between the quantity of tree prunings applied as green manure and annual crop yield, and a second more generalized form which accommodates other relationships between green manure application and crop yield (e.g., logarithmic or parabolic). Although designed specifically for alley farming the modified index can also accommodate alley cropping systems.

alley cropping green manure hedgerow intercropping polyculture replacement value of the intercrop (RVI) 


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  1. Atta-krah A and Sumberg J (1988) Studies with Gliricidia sepium for crop/livestock production systems in West Africa. Agroforestry Systems 6: 97–118Google Scholar
  2. Current D and Scherr S (1995) Farmer costs and benefits from agroforestry and farm forestry projects in Central America and the Caribbean: implications for policy. Agroforestry Systems 30: 87–103CrossRefGoogle Scholar
  3. Jabbar M, Cobbina J and Reynolds L (1992) Optimum fodder-mulch allocation of tree foliage under alley farming in southwest Nigeria. Agroforestry Systems 20: 187–198CrossRefGoogle Scholar
  4. Kang B, Reynolds L and Atta-Krah A (1990) Alley farming. Advances in Agronomy 43: 315–359CrossRefGoogle Scholar
  5. Kang B, Wilson G and Lawson T (1984) Alleycropping: a stable alternative to shifting cultivation. International Institute of Tropical Agriculture, Ibadan, NigeriaGoogle Scholar
  6. Kang B, Wilson G and Sipkens L (1981) Alley cropping maize and Leucaena leucocephala Lam. in Southern Nigeria. Plant and Soil 63: 165–179CrossRefGoogle Scholar
  7. Larbi A, Jabbar M, Atta-Krah A and Cobbina J (1993) Effect of taking a fodder crop on maize grain yield and soil chemical properties in Leucaena and Gliricidia alley farming systems in western Nigeria. Experimental Agriculture 29: 317–321CrossRefGoogle Scholar
  8. Mead R and Willey R (1980) The concept of a ‘Land Equivalent Ratio’ and advantages in yields from intercropping. Experimental Agriculture 16: 217–228CrossRefGoogle Scholar
  9. Ong C (1996) A framework for quantifying the various effects of tree-crop interactions. In: Ong C and Huxley P (eds) Tree-Crop Interactions. CAB International, Wallingford, UKGoogle Scholar
  10. Ong C, Corlett J, Singh R and Black C (1991) Above ground interactions in agroforestry systems. In: Jarvis P (ed) Agroforestry: Principles and Practice, pp 45–56. Elvier, AmsterdamGoogle Scholar
  11. Schultz B, Phillips C, Rosset P and Vandermeer J (1982) An experiment in intercropping tomatoes and cucumbers in southern Michigan, USA. Scientia Horticulturae 18: 1–8CrossRefGoogle Scholar
  12. Vandermeer J (1989) The Ecology Intercropping. Cambridge University Press, New YorkCrossRefGoogle Scholar
  13. Weischet W and Caviedes C (1989) The Persisting Ecological Constraints of Tropical Agriculture. John Wiley and Sons, New YorkGoogle Scholar
  14. Wiersum K (1991) Soil erosion and conservation in agroforestry systems. In: Avery M, Cannell M and Ong C (eds) Biophysical Research in Asian Agroforestry, pp 209–230. Winrock International, USAGoogle Scholar

Copyright information

© Kluwer Academic Publishers 1998

Authors and Affiliations

  • B. C. Blair
    • 1
  1. 1.School of Natural Resources and EnvironmentUniversity of Michigan, Dana BuildingAnn ArborUSA

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