The alley farming index: Preliminary steps towards a more realistic model
Author: Blair, B.
Source: Agroforestry Systems, Volume 40, Number 1, January 1998 , pp. 19-27(9)
Abstract: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.
Document Type: Research Article
Affiliations: School of Natural Resources and Environment, University of Michigan, Dana Building, 430 E. University, Ann Arbor, MI, 48109-1115, USA, Email: email@example.com
Publication date: January 1998