• Bridle TR, Pritchard D (2004) Energy and nutrient recovery from sewage sludge via pyrolysis. Water Science and Technology, 50, 169175.
  • Chan KY, Zweiten LV, Meszaros I, Downie A, Joseph S (2007) Agronomic values of greenwaste biochar as a soil amendment. Australian Journal of Soil Research, 45, 629634.
  • Chan KY, Zweiten LV, Meszaros I, Downie A, Joseph S (2008) Using poultry litter biochars as soil amendments. Australian Journal of Soil Research, 46, 437444.
  • Durenkamp M, Luo Y, Brookes PC (2010) Impact of black carbon addition to soil on the determination of soil microbial biomass by fumigation extraction. Soil Biology & Biochemistry, 42, 20262029.
  • Gaskin JW, Speir RA, Harris K, Das KC, Lee RD, Morris LA, Fisher DS (2010) Effect of peanut hull and pine chip biochar on soil nutrients, corn nutrient status, and yield. Agronomy Journal, 102, 623633.
  • Helmisaari HS, Hanssen KH, Jacobson S et al. (2011) Logging residue removal after thinning in Nordic boreal forests: long-term impact on tree growth. Forest Ecology and Management, 261, 19191927.
  • Houssain MK, Strezov V, Chan KY, Ziolkowski A, Nelson PF (2011) Influence of pyrolysis temperature on production and nutrient properties of wastewater sludge biochar. Journal of Environmental Management, 92, 223228.
  • Knicker H (2010) “Black nitrogen”–an important fraction in determining the recalcitrance of charcoal. Organic Geochemistry, 41, 947950.
  • Lehmann J (2007) Bio-energy in the black. Frontiers in Ecology and the Environment, 5, 381387.
  • Prendergast-Miller MT, Duvall M, Sohi SP (2011) Localisation of nitrate in the rhizosphere of biochar-amended soils. Soil Biology & Biochemistry, 43, 22432246.
  • Shackley S, Hammond J, Gaunt J, Ibarrola R (2011) The feasibility and costs of biochar deployment in the UK. Carbon Management, 2, 335356.
  • Sharpley A, Moyer B (2000) Phosphorus forms in manure and compost and their release during simulated rainfall. Journal of Environmental Quality, 29, 14921496.
  • Silber A, Levkovitch I, Graber ER (2010) pH-dependent mineral release and surface properties of cornstraw biochar: agronomic implications. Environmental Science & Technology, 44, 93189323.
  • Steiner C, Teixeira W, Lehmann J, Nehls T, de Macêdo J, Blum W, Zech W (2007) Long term effects of manure, charcoal and mineral fertilization on crop production and fertility on a highly weathered Central Amazonian upland soil. Plant and Soil, 291, 275290.
  • Systat Software, Inc. (2008) SigmaPlot 11.0. Systat Software Inc., San Jose, California.
  • Wu Y, Liu S (2012) Impacts of biofuels production alternatives on water quantity and quality in the Iowa River Basin. Biomass and Bioenergy, 36, 182191.
  • Wu H, Kongvui Y, Kong Z, Li CZ, Liu D, Yu Y, Gao X (2011) Removal and recycling of inherent inorganic nutrient species in mallee biomass and derived biochars by water leaching. Industrial & Engineering Chemistry Research, 50, 1214312151.
  • Yao FX, Arbestain MC, Virgel S, Blanco F, Arostegui J, Maciá-Agulló JA, Macías F (2010) Simulated geochemical weathering of a mineral ash-rich biochar in a modified Soxhlet reactor. Chemosphere, 80, 724732.