Soil Organic Carbon.

McConkey, B.G., Hutchinson, J.J., Smith, W.N., Grant, B.B., and Desjardins, R.L. (2005). "Soil Organic Carbon.", in Lefebvre, A., Eilers, W.D. and Chunn, B. (eds.) - Environmental Sustainability of Canadian Agriculture: Agri-Environmental Indicator Report Series. Report #2/L'agriculture écologiquement durable au Canada : Série sur les indicateurs agroenvironnementaux - Rapport n° 2, Agriculture and Agri-Food Canada (AAFC)/Agriculture et Agroalimentaire Canada (AAC), Chapter 14, pp. 108-113.