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
Library ResourceReports & ResearchDecember, 1994Burkina Faso, Nigeria, Zambia, Zimbabwe, China, Eswatini, Ghana, Malawi, Thailand, Kenya, South Africa, Lesotho, Uganda, Italy, Tanzania, Sudan, Brazil
Meeting symbol/code: CSC(94)AGR-21
Library ResourceReports & ResearchDecember, 2012France, Nigeria, Chile, Germany, China, Australia, Latvia, Austria, Malawi, Kenya, Morocco, Somalia, Italy, Syrian Arab Republic, Netherlands, Argentina, India, Senegal, Mexico, Canada
The objective of the workshop was to discuss in particular the various aspects of global soil information (Pillar 4 of the GSP) and the related information gathered by the e-SOTER project. The presentations and discussion were subdivided in four main sessions dealing with the following subjects: Status and needs of Global Soil Information Tools for polygon-based soil mapping (e-SOTER) Tools for Digital Soil Mapping The way-forward for Global Soil Information
Library ResourceJournal Articles & BooksDecember, 1999Sudan, Burkina Faso, Nigeria, Mauritania, Mali, Sweden, Germany, Indonesia, Ethiopia, Pakistan, Niger, Cameroon, Kenya, Republic of Korea, Malaysia, Somalia, Italy, Tanzania, India, Senegal, Chad, France
Library ResourceReports & ResearchMarch, 2017Egypt, Tanzania, Nigeria, Brazil, Colombia, Peru, Indonesia, Greece
This 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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