Chemical and physical properties of wood chips Chemical and physical properties of wood chips

Chemical and physical properties of wood chips. For concentrations of metals, link here.
Link to this table

Property	Range found in literature1	Median value from literature
Total phosphorus (mg/kg)	0.027 - 0.24	0.13
Total nitrogen (mg/kg)	0.31 – 1.8	0.38
Total potassium (mg/kg)	100-1600	709
Total carbon (mg/kg)	434-498	47.1
pH	3.34-5.07	3.47
Cation exchange capacity (cmol/kg)1	bark: 57-92 wood: 30-46
Total calcium (mg/kg)	600-6200	1190
Total magnesium (%)	60-6200	189
Bulk density (g/cm3)	0.138 - 0.422	0.293
Water holding capacity (% by wt)		58.5
Total pore space (%)	60-63	61.5

Primary references for this data:

• Ima and Mann, 2007
• Hamid et al., 2016
• Pintor-Ibarra et al., 2016
• Kim et al., 2016
• Chandrasekaran et al., 2012
• Venner et al., 2011
• New York State Energy Research and Development Authority, 2013
• Warner, 1976
  

¹CEC increased as chip size decreased