Soil quality is the capacity of a specific kind of soil to function within a natural or managed ecosystem boundaries to sustain plant and animal productivity, maintain or enhance water and air quality and support human health and habitation'. The primary benefit of enhanced soil quality is the protection of a finite resource. Maintenance and enhancement of soil quality maintains maximum efficiency in crop productivity over time by enhancing nutrient cycling and encouraging site-specific application of nutrients. It protects water and air quality and preserves the beneficial functions of the soil in specific ecosystems. Indeed, soil quality is directly linked to food quality and quantity. Healthy soil quality has good soil drainage, good soil tilth, sufficient, but not excessive, nutrient supply, sufficient depth, large population of beneficial organisms, no chemicals or toxins that may harm the crop, resilience to degradation and unfavorable conditions.