~ Industrial wastes such as harmful gases and chemicals, agricultural pesticides, fertilizers and insecticides are the most common causes of soil pollution.
~ Ignorance towards soil management and related systems.
~ Unfavorable and harmful irrigation practices.
~ Improper septic system and management and maintenance of the same.
Read more at Buzzle: http://www.buzzle.com/articles/soil-pollution-causes-and-effects.html