Soil is a vital natural resource on the earth's surface their proper use depends the life supporting systems of a country and socio-economic development of its people. The relationship of soil, environment and society is intimate and depends on soil quality and its management. Soil science is the branch of agriculture that deals with soil considered as a natural body and as an important medium for plant growth. Therefore a fundamental knowledge of soil science is prerequisite to meeting the natural resource challenges that will face humanity in the 21st century.