Crown diameter and tree density were measured in 52 communities in the Sudan-Sahel using satellite imagery to determine the relationships between rainfall and distance from community center to crown size diameter and tree density. As distance from the community center increased, tree density and crown diameter decreased. As rainfall increased, tree density decreased while crown diameter increased. Distance from the community center is a proxy for age since urbanization and our results indicate that older parts of communities show longer and more consistent tree management.
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Library ResourcePeer-reviewed publicationDecember, 2014Algeria, Sudan, Burkina Faso, Nigeria, Mauritania, Chad, Mali, Cameroon, Senegal, Central African Republic, South Sudan, Ethiopia, Niger, Eritrea, Africa
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Library Resource
2016 Testing of a New Survey Module on Perceptions of Land Tenure Security in Nine Countries
Reports & ResearchMarch, 2017Egypt, Tanzania, Nigeria, Brazil, Colombia, Peru, Indonesia, GreeceThis report presents results from nationally representative surveys with 1,000 residents aged 15 and older in eight countries — Brazil, Colombia, Egypt, Greece, Indonesia, Nigeria, Peru and Tanzania — and with 3,000 residents in India. Each survey attained comprehensive coverage of both urban and rural areas of the country using multi-stage stratified cluster sampling.1 Standardized interviewer and supervisor training, as well as robust validation of data collection/data entry, help to ensure rigorous quality standards.
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Library Resource
Empirical evidence from Ondo and Kano states
Reports & ResearchJanuary, 2014NigeriaIn line with the conventional view that customary land rights impede agricultural development, the traditional tenure system in Nigeria has been perceived to obstruct the achievement of efficient development and agricultural transformation. This led to the Land Use Act (LUA) of 1978.
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