Agriculture is vital to the economies of Sub-Saharan Africa: two-thirds of the region’s people depend on it for their livelihoods. Nevertheless, agricultural productivity in most of the region is stagnant or declining, in large part because of land degradation.
1. The concept of threshold has become important in ecology, but the nature of potential threshold responses of vegetation to grazing in rangeland ecosystems remains poorly understood. We aimed to identify ecological thresholds in vegetation changes along a grazing gradient and to examine whether threshold changes were expressed similarly at a variety of ecological sites. 2.
This strategic framework serves to guide and support the operational response of the World Bank Group (WBG) to new development challenges posed by global climate change. Unabated, climate change threatens to reverse hard-earned development gains. The poorest countries and communities will suffer the earliest and the most. Yet they depend on actions by other nations, developed and developing.
"This article analyzes the on-site and off-site economic impacts of various sustainable land management (SLM) practices in Kenya. Long-term trial data are used to establish the relationship between SLM practices and maize yield.
A cutover bog contaminated with seawater in New Brunswick, Canada remained barren 5 years after peat extraction operations ceased despite the proximity of natural seed sources. The aim of the study was to identify abiotic stresses impeding plant establishment and test transplanting of salt-tolerant wetland plants.
Soils are a vital substrate for agricultural production, play a central role in regulating the global carbon budget, and are a valuable source of biodiversity. Yet estimates of the global area affected by soil and land degradation are continuing to increase.
La demanda de biocombustibles se está incrementando debido a la necesidad cada vez mayor de energéticos, el alza en el costo del petróleo, la búsqueda de fuentes de energía renovables y no contaminantes y el deseo de aumentar los ingresos agrícolas en los países en desarrollo.
This strategic framework serves to guide and support the operational response of the World Bank Group (WBG) to new development challenges posed by global climate change. Unabated, climate change threatens to reverse hard-earned development gains. The poorest countries and communities will suffer the earliest and the most. Yet they depend on actions by other nations, developed and developing.
Durant son enfance, Cécile Bibiane Ndjebet, qui a grandi dans une région reculée du Cameroun, avait une conscience aiguë des difficultés auxquelles les femmes rurales faisaient face. Elle voyait sa mère et d'autres femmes travailler de l'aube au crépuscule, pour s'occuper de la terre, des animaux et élever les enfants. Beaucoup d'entre elles effectuaient un travail éreintant sur des terres qu'elles ne pourraient jamais posséder en raison des pratiques socioculturelles traditionnelles.
