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Accueil du site → Doctorat → États-Unis → 1996 → The anatomy of innovation adoption : the case of successful agroforestry in East Africa

Colorado State University (1996)

The anatomy of innovation adoption : the case of successful agroforestry in East Africa

Tyndall, Bradley P

Titre : The anatomy of innovation adoption : the case of successful agroforestry in East Africa.

Auteur : Tyndall, Bradley P

Université de soutenance : Colorado State University

Grade : Doctor of Philosophy (PhD) 1996

The Silver oak (Grevillea robusta) has become a very common on-farm tree species in many parts of Eastern Africa. In Kirinyaga, Kenya, where this study was completed, the tree is found in very large numbers on small private farms, about 40 per hectare, on 94 percent of the farms. To understand the reasons for the widespread adoption and its impact, a holistic socioeconomic framework and data methodologies for adoption research were developed. The framework divides adoption into physical, economic and institutional aspects with many branches under each of these general rubrics. The researcher should first complete ’key informant’ interviews, the ’key informant’ surveys, then small topical surveys and larger quantifying surveys, consecutively. The case study of the Silver oak included five ’key informant’ surveys and interviews, six topical surveys, and one 89-household survey. In addition, three crop and tree measurement activities were completed as part of an enterprise budget analysis. Potentially relevant adoption variables were identified from the interviews and small surveys. These variables were then included in the 89- household survey and were tested as independent variables in regression models where the level of adoption was the dependent variable. The results indicate several reasons for Grevillea’s large-scale adoption. Physically, the tree has few lateral roots which interfere with crops and it has a small crown to minimize the shading of crops. Socially, as part of a pre-colonial tradition, the tree serves to mark boundaries in an environment of land tenure insecurity. Economically, farms with the Grevillea are over 4 percent more profitable than farms without the tree. In terms of intangible costs and benefits, the Grevillea was viewed to be equally beneficial as beans and more beneficial than any other farm crop or tree. The case of the Grevillea in Eastern Africa supports the ’induced-adoption’ or ’technology-pull’ paradigm of innovation adoption. True to this paradigm, the tree technology was first adapted and then adopted to meet the land tenure and fuelwood exigencies of the area. Given this induced-adoption paradigm of technology transfer, speculations were made as to relevant extension and development strategies. A ’technology scattering’ strategy is introduced. This strategy entails advancing many ’half-baked’ technologies through multi-disciplinary extension teams.

Sujets : Agricultural economics/ Agroforestry/ Silver oak USE Grevillea robusta/ Grevillea robusta/Kirinyaga, Kenya/ ;

Présentation (Research Kenya)

Page publiée le 30 décembre 2016, mise à jour le 19 novembre 2018