ABSTRACT
The underlying causes of overall increase in global crop yields due partly to increase in fertilizer consumption and persistence of low crop yields and hunger in sub-Saharan Africa and parts of South Asia may be related to soil quality, soil degradation, and soil resilience. Accelerated soil erosion and other degradative processes influence agronomic productivity and environment through their impact on soil quality. Soil erosion adversely affects all three aspects of soil quality, especially soil physical quality, which are due to decline in soil structure and imbalance in soil-water regime. Understanding the complex and interactive relationship between soil erosion and soil quality will be a major step toward solving the problem of food insecurity and the decline in environment quality. Soil degradation is a global threat, and it has strong impacts on food and energy resources and environments, especially in relation to water quality and the greenhouse effect.
