The dominant modes of vegetation variability over Zimbabwe are investigated using principal component analysis (PCA) on National Oceanic and Atmospheric Administration Advanced Very High Resolution Radiometer (NOAA-AVHRR) normalized difference vegetation index (NDVI) monthly imagery from 1982 to 2006. Spectral analysis is also used to determine the periodicities of the component loadings. NDVI PCA-1 corresponds to the major vegetation types of Zimbabwe, and we demonstrated that grasslands and dry savannah have the strongest relationship with mean annual precipitation.
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Library ResourceJournal Articles & BooksDecember, 2013Zimbabwe
Library ResourceJournal Articles & BooksDecember, 2013South Africa, Southern Africa
Urban agriculture is potentially an important element of land reform and economic development programmes in South Africa. The social value of urban agriculture, such as improving food security, developing a sense of community and promoting ecological conservation, is well documented. But in order to effectively contribute to development agendas, urban agriculture must also present viable, sustainable economic opportunities. This study sets forth vegetable box schemes as a context-appropriate, economically feasible urban agriculture enterprise for which there is growing consumer demand.
Library ResourceJournal Articles & BooksDecember, 2012Colombia, Central America, South America
This paper analyzes the intersection of two parallel developments that have had a curious impact on agrarian politics in Colombia: on the one hand, attempts to appropriate land for ‘green’ ends such as biofuel production, which have become ubiquitous all across Latin America, and on the other, the implementation of multicultural reforms, which in Colombia resulted in the collective titling of more than five million hectares of land for ‘black communities’.