REFERENCES
- Amonette , J. E. , Hu , Y. , Schlekewey , N. , Dai , S S. , Shaff , Z. W. Russell , C. K. Presentation given at the North American Biochar Conference 2009 . Boulder, CO. Biochars are not created equal: A survey of their physical, structural, and chemical properties and implications for soil application , Retrieved August 30, 2010, from http://cees.colorado.edu/docs/Amonette_Production_Presentation_NABC2009.pdf
- Kimble , J. M. , Lal , R. and Follett , R. F. 2002 . Agricultural practices and policies for carbon sequestration in soil , Boca Raton, FL : Lewis Publishers .