1. Lal R (2008) Carbon sequestration. Philos Trans R Soc B Biol Sci 363(1492):815–830
2. Schlesinger WH (1997) Biogeochemistry. An analysis of global change (2nd ed) xiii + 588 pp. Academic, San Diego. ISBN 0 12 625155 X
3. Bruce JP, Frome M, Haites E, Janzen H, Lal R, Paustian K (1999) Carbon sequestration in soils. J Soil Water Conserv 54(1):382–389
4. Paul EA (1976) Nitrogen cycling in terrestrial ecosystems. In: Nriagu JO (ed) Environmental biochemistry. Volume 1. Carbon, nitrogen, phosphorous, sulfur and selenium cycles. Ann Arbor Science, Ann Arbor, pp 225–243
5. Osman KT (2013) Forest soils. In: Soils. Springer, Dordrecht, pp 229–251