Discussion

Agroforestry has a large potential to sustainably intensify farming practices that provide (a) enhanced food security, (b) multiple sources of income from the sale of products other than crops, (c) financial resilience to withstand food insecure periods during droughts and floods, and effective climate change mitigation through carbon sequestration \citep{Verchot_2007,Thorlakson_2012}. The previous section highlighted a selection of key challenges that need to be addressed in order to stimulate the adoption of agroforestry in sub-Saharan Africa. However, these challenges are unlikely to be the same in whole sub-Saharan Africa and possibly large differences concerning the adoption potentials for agroforestry between the countries need to be acknowledged.

In order to estimate the adoption potentials for different countries, we follow the differentiation between extrinsic influential factors and intrinsic factors as proposed by \citet{Meijer_2014}. Their approach is comparable to the aforementioned Edinburgh relationship by which extrinsic and intrinsic factors both shape the knowledge, attitudes and perceptions of smallholder farmers and thus their decision whether to adopt agroforestry technologies. However, as intrinsic factors such as farmers’ and researchers’ perceptions of technology, use value, tree mortality, or pests are arguably difficult to assess for a large number of countries, in this study we exclusively focus on extrinsic factors. The per-country assessment has been performed based on seven World bank indicators that approximate the explanatory variables for extrinsic factors \citep[p. 7]{Meijer_2014}. Each table cell corresponds to a value of a country for a specific indicator whose colour indicates its relationship to the best value of the country selection. Green coloured table cells thus indicate conditions that facilitate the adoption of agroforestry methods.