Rural areas in Sub-Saharan Africa are evolving in a global environment that is undergoing multiple crises. These are linked to climate variability, deforestation, migratory pressure, soil depletion, political, economic, social and land crises, the depreciation of agricultural commodity prices and the disengagement of governments from agricultural production marked by the appearance of new actors (NGOs). In this highly changing context, farmers are multiplying adaptive measures. Based on research conducted in the southwestern Plateaux Region of Togo, which has long been considered the main area of food production, export crops and migration, this book analyzes in its first chapter the factors related to the degradation of the natural environment. The second chapter examines the dynamics of inland valley systems as an adaptive measure. The low profitability of inland valleys shows that their exploitation is hampered by technical and social constraints that require the establishmentof appropriate management structures.