Gonzalez-Perez, Jose A.; Gonzalez-Vila, Francisco J.; Almendros, Gonzalo; Knicker, Heike (2004). «The effect of fire on soil organic matter-a review». Environment International (Elsevier) 30 (6): 855-870. PMID15120204. doi:10.1016/j.envint.2004.02.003. Consultado el 4 de enero de 2019. «As a whole, BC represents between 1 and 6% of the total soil organic carbon. It can reach 35% like in Terra Preta Oxisols (Brazilian Amazonia) (Glaser et al., 1998, 2000) up to 45 % in some chernozemic soils from Germany (Schmidt et al., 1999) and up to 60% in a black Chernozem from Canada (Saskatchewan) (Ponomarenko and Anderson, 1999)».
nih.gov
ncbi.nlm.nih.gov
Gonzalez-Perez, Jose A.; Gonzalez-Vila, Francisco J.; Almendros, Gonzalo; Knicker, Heike (2004). «The effect of fire on soil organic matter-a review». Environment International (Elsevier) 30 (6): 855-870. PMID15120204. doi:10.1016/j.envint.2004.02.003. Consultado el 4 de enero de 2019. «As a whole, BC represents between 1 and 6% of the total soil organic carbon. It can reach 35% like in Terra Preta Oxisols (Brazilian Amazonia) (Glaser et al., 1998, 2000) up to 45 % in some chernozemic soils from Germany (Schmidt et al., 1999) and up to 60% in a black Chernozem from Canada (Saskatchewan) (Ponomarenko and Anderson, 1999)».
orst.edu
fsl.orst.edu
Gonzalez-Perez, Jose A.; Gonzalez-Vila, Francisco J.; Almendros, Gonzalo; Knicker, Heike (2004). «The effect of fire on soil organic matter-a review». Environment International (Elsevier) 30 (6): 855-870. PMID15120204. doi:10.1016/j.envint.2004.02.003. Consultado el 4 de enero de 2019. «As a whole, BC represents between 1 and 6% of the total soil organic carbon. It can reach 35% like in Terra Preta Oxisols (Brazilian Amazonia) (Glaser et al., 1998, 2000) up to 45 % in some chernozemic soils from Germany (Schmidt et al., 1999) and up to 60% in a black Chernozem from Canada (Saskatchewan) (Ponomarenko and Anderson, 1999)».
uiuc.edu
webh2o.sws.uiuc.edu
Krug, Edward C. (2003). «Identification of Factors that Aid Carbon Sequestration in Illinois Agricultural Systems». Champaign, Illinois: Illinois State Water Survey. Archivado desde el original el 9 de agosto de 2017. Consultado el 6 de enero de 2019. «While humus (especially in organomineral form) helps give soils a black color (Duchaufour, 1978), the literature shows correlation between forest and grassland soil color to BC - the blacker the soil the higher its BC content (Schmidt and Noack, 2000)».
web.archive.org
Krug, Edward C. (2003). «Identification of Factors that Aid Carbon Sequestration in Illinois Agricultural Systems». Champaign, Illinois: Illinois State Water Survey. Archivado desde el original el 9 de agosto de 2017. Consultado el 6 de enero de 2019. «While humus (especially in organomineral form) helps give soils a black color (Duchaufour, 1978), the literature shows correlation between forest and grassland soil color to BC - the blacker the soil the higher its BC content (Schmidt and Noack, 2000)».
