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CABI Book Chapter

Trees on the farm: assessing the adoption potential of agroforestry practices in Africa.

Book cover for Trees on the farm: assessing the adoption potential of agroforestry practices in Africa.

Description

This book assesses the adoption of selected agroforestry practices developed with African farmers, describing methods, and drawing out the implications for research, development and policy. Five case studies conducted in Kenya and Zambia to evaluate the adoption potential of agroforestry are included. The cases illustrate methods of farm and village technology design, testing and analysis that are...

Chapter 2 (Page no: 37)

Assessing the adoption potential of improved fallows in Eastern Zambia.

Declining soil fertility is a key problem faced by farmers in eastern Zambia. This chapter assesses farmers' experiences of testing improved tree fallows in participatory on-farm trials to increase soil fertility. It also highlights the development of an adaptive research and dissemination network of institutions and farmer groups for testing and disseminating improved fallows. Sesbania sesban and Tephrosia vogelii performed well, but Cajanus cajan was discontinued because it was browsed heavily by livestock. The economic analysis compared a 2-year improved fallow, followed by maize cropped for 3 years, with fertilized and unfertilized continuously cropped maize. Over a 5-year period, farmers used 11% less labour on the improved fallow plot than on unfertilized maize, but harvested 83% more maize. Improved fallows had higher returns to land and to labour than continuously cropped unfertilized maize; returns compared to fertilized maize were mixed. Farmer interest is strong, as the number of farmers planting improved fallows has increased from under 20 in 1993-94 to roughly 10‚ÄČ000 in 2000. Key elements contributing to the progress made thus far include: (1) effective diagnosis of farmers' problems and screening of potential solutions; (2) farmer participation in the early stages of testing of improved fallows; (3) testing of a range of management options by farmers and researchers, and encouraging farmers to innovate; and (4) development of an adaptive research and dissemination network.

Other chapters from this book

Chapter: 1 (Page no: 11) Methods for assessing agroforestry adoption potential. Author(s): Franzel, S. Scherr, S. J. Coe, R. Cooper, P. J. M. Place, F.
Chapter: 3 (Page no: 65) The adoption potential of short rotation improved tree fallows: evidence from Western Kenya. Author(s): Swinkels, R. A. Franzel, S. Shepherd, K. D. Ohlsson, E. Ndufa, J. K.
Chapter: 4 (Page no: 89) Assessing the adoption potential of hedgerow intercropping for improving soil fertility, Western Kenya. Author(s): Swinkels, R. A. Shepherd, K. D. Franzel, S. Ndufa, J. K. Ohlsson, E. Sjogren, H.
Chapter: 5 (Page no: 111) Farmer-designed agroforestry trials: farmers' experiences in Western Kenya. Author(s): Franzel, S. Ndufa, J. K. Obonyo, O. C. Bekele, T. E. Coe, R.
Chapter: 6 (Page no: 125) Calliandra calothyrsus: assessing the early stages of adoption of a fodder shrub in the highlands of Central Kenya. Author(s): Franzel, S. Arimi, H. K. Murithi, F. M.
Chapter: 7 (Page no: 145) Promoting new agroforestry technologies: policy lessons from on-farm research. Author(s): Scherr, S. J. Franzel, S.
Chapter: 8 (Page no: 169) Assessing adoption potential: lessons learned and future directions. Author(s): Franzel, S. Scherr, S. J.