Bibliography

• State University of New York College of Environmental Science and Forestry. (n.d.). Soil pH: What it Means. Retrieved February 12, 2013, from ESF: http://www.esf.edu/pubprog/brochure/soilph/soilph.htm
• Wikipedia. (n.d.). pH. Retrieved February 12, 2013, from Wikipedia: http://en.wikipedia.org/wiki/PH
• Everhart, E. (1994, June 4). How to Change Your Soil's pH. Retrieved February 12, 2013, from Iowa State University - Extension and Outreach: Horticulture & Home Pest News: http://www.ipm.iastate.edu/ipm/hortnews/1994/4-6-1994/ph.html