Soil science deals with the origins, characteristics and the use of soils for purposes of sustained biological production, the retention of environmental quality, as well as promoting health in plants, animals and people. information about the composition of soil is required for a variety of reasons. it may be needed to assist with planning and surveying for land development purposes; to assess the effect of agrochemicals used in farming; to aid land restoration and reclamation projects; to gauge drainage and irrigation requirements; or to investigate environmental, climatic and pollution issues.