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.
It is known that erosion is a leading factor in land degradation. Therefore, erosion must be correctly estimated and effective precautions must be taken for a sustainable agricultural activity. Hence, many models and methods have been developed for estimation of soil erodibility or calculating of quantity of the soil loss.
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.
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.
L’outil cartographique WOCAT-LADA-DESIRE est fondé sur le questionnaire original WOCAT sur la cartographie (WOCAT, 2007). Celui-ci a été développé de façon à accorder plus d’attention aux problèmes de dégradation biologique et de l’eau. Il met davantage l’accent sur les causes directes et socio-économiques de ces phénomènes incluant leurs impacts sur les fonctionnements des écosystèmes.
Метод картирования ВОКАТ-ЛАДА-ДЕЗИРЕ основывается на исходной анкете картирования ВОКАТ (WOCAT, 2007). Она был расширена чтобы уделить большее внимание таким вопросам как биологическая и водная деградация и придает большее значение непосредственным и социо-экономическим причинам этих феноменов включая их влияния на услуги эко-системы.
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.
