The soil organic carbon (SOC) stocks (Mg ha–1) ofautomorphic mineral (9 soil groups), hydromorphic mineral (7), and lowland organic soils (4) are given for the soil cover or solum layer as a whole and also for its epipedon (topsoil) layer. The SOC stocks for forest, arable lands, and grasslands and for the entire Estonian soil cover were calculated on the basis of the mean SOC stock and distribution area of the respective soil type. In the Estonian soil cover (42 400 km2), a total of 593.8 ± 36.9 Tg of SOC is retained, with 64.9% (385.3 ± 27.5 Tg) in the epipedon layer (O, H, and A horizons) and 35.1% in the subsoil (B and E horizons). The pedo-ecological regularities of SOC retention in soils are analysed against the background of the Estonian soil ordination net.
Arold, I. 2005. Eesti maastikud [Estonian landscapes]. Tartu University Press, Tartu, 453 pp. [in Estonian, with English summary].
Arrouays, D., Deslais, W. & Badeau, V. 2001. The carbon content of topsoil and its geographical distribution in France. Soil Use and Management, 17, 7–11.
Batjes, N. H. 1996. Total carbon and nitrogen in the soils of the World. European Journal of Soil Science, 47, 151–163.
doi:10.1111/j.1365-2389.1996.tb01386.x
Bellamy, P. H., Loveland, P. J., Bradley, R. I., Lark, R. M. & Kirk, G. J. 2005. Carbon losses from all soils across England and Wales 1978–2003. Nature, 437, 245–248.
doi:10.1038/nature04038
Bernoux, M., Carvalho, M. C. S., Volkoff, B. & Cerri, C. C. 2002. Brazil’s soil carbon stocks. Soil Science Society of America Journal, 66, 888–896.
DeBusk, W. F., White, J. R. & Reddy, K. R. 2001. Carbon and nitrogen dynamics in wetland soils. In Modeling Carbon and Nitrogen Dynamics for Soil Management (Shaffer, M. J., Ma, L. & Hansen, S., eds), pp. 27–53. Lewis Publishers, Boca Raton.
Eswaran, H., Berg, E. V. D. & Reich, P. 1993. Organic carbon in soils of the World. Soil Science Society of America Journal, 57, 192–194.
Falloon, P. D., Smith, P., Smith, J. U., Szabo, J., Coleman, K. & Marshall, S. 1998. Regional estimates of carbon sequestration potential: linking the Rothamsted Carbon Model to GIS databases. Biology and Fertility of Soils, 27, 236–241.
doi:10.1007/s003740050426
FAO, ISRIC & ISSS 1998. World Reference Base for Soil Resources. World Soil Resources Reports, 84, Rome, 88 pp.
Filcheva, E. & Mitova, T. 2002. Effect of crop rotation on the composition of soil organic matter. In Agricultural Practices and Policies for Carbon Sequestration in Soil (Kimble, J. M., Lal, R. & Follett, R. F., eds), pp. 237–244. CRC Press, Boca Raton.
Gijsman, A. J., Hoogenboom, G., Parton, W. J. & Kerridge, P. C. 2002. Modifying DSSAT crop models for low-input agricultural systems using a soil organic matter-residue module from CENTURY. Agronomy Journal, 94, 462–474.
Halvarson, A. D., Wienhold, B. J. & Black, A. 2002. Tillage, nitrogen, and cropping system effects on soil carbon sequestration. Soil Science Society of America Journal, 66, 906–912.
Janzen, H. H. 2006. The soil carbon dilemma: Shall we hoard it or use it? Soil Biology & Biochemistry, 38, 419–424.
doi:10.1016/j.soilbio.2005.10.008
Jones, R. J. A., Hiederer, R., Rusco, E. & Montanarella, L. 2005. Estimating organic carbon in the soils of Europe for policy support. European Journal of Soil Science, 56, 655–671.
doi:10.1111/j.1365-2389.2005.00728.x
Kachinsky, N. A. 1965. Fizika pochv [Soil physics]. Vol. I. University Press, Moscow, 323 pp. [in Russian].
Kätterer, T., Andren, O. & Persson, J. 2004. The impact of altered management on long-term agricultural carbon stocks – a Swedish case study. Nutrient Cycling in Agroecosystems, 70, 179–187.
doi:10.1023/B:FRES.0000048481.34439.71
Kern, J. S. 1994. Spatial patterns of soil organic carbon in the contiguous United States. Soil Science Society of America Journal, 58, 439–455.
Kern, J. S., Turner, D. P. & Dodson, R. F. 1998. Spatial patterns of soil organic carbon pool size in the Northwestern United States. In Soil Processes and the Carbon Cycle (Lal, R., Kimble, J. M., Follett, R. F. & Stewart, B. A., eds), pp. 29–43. CRC Press, Boca Raton.
Koch, H.-J. & Stockfisch, N. 2006. Loss of soil organic matter upon ploughing under loess soil after several years of soil conservation tillage. Soil & Tillage Research, 86, 73–83.
doi:10.1016/j.still.2005.02.029
Kokk, R. 1995. Distribution and properties of soils. In Eesti. Loodus [Estonia. Nature] (Raukas, A., ed.), pp. 430–439. Valgus, Tallinn [in Estonian, with English summary].
Kõlli, R. & Ellermäe, O. 2003. Humus status of postlithogenic arable mineral soils. Agronomy Research, 1, 161–174.
Kõlli, R., Asi, E. & Köster, T. 2004. Organic carbon pools in Estonian forest soils. Baltic Forestry, 10, 19–26.
Kõlli, R., Köster, T. & Kauer, K. 2007. Organic matter of Estonian grassland soils. Agronomy Research, 5, 109–122.
Kõlli, R., Astover, A., Noormets, M., Tõnutare, T. & Szajdak, L. 2009. Histosol as an ecologically active constituent of peatland: a case study from Estonia. Plant and Soil, 315, 3–17.
doi:10.1007/s11104-008-9792-0
Körchens, M., Weigel, A. & Shulz, E. 1998. Turnover of soil organic matter (SOM) and long-term balances – tools for evaluating sustainable productivity of soils. Zeitschrift Pflanzenernährung und Bodenkunde, 161, 409–424.
Krogh, L., Noergaard, A., Hermansen, M., Greve, M. H., Balstroem, T. & Breuning-Madsen, H. 2003. Preliminary estimates of contemporary soil organic carbon stocks in Denmark using multiple datasets and for scaling-up methods. Agriculture, Ecosystems & Environment, 96, 19–28.
Lal, R., Kimble, J. M. & Follett, R. F. 1998a. Pedospheric processes and the carbon cycle. In Soil Processes and the Carbon Cycle (Lal, R., Kimble, J. M., Follett, R. F. & Stewart, B. A., eds), pp. 1–8. CRC Press, Boca Raton.
Lal, R., Kimble, J. & Follett, R. 1998b. Land use and soil C pools in terrestrial ecosystems. In Management of Carbon Sequestration in Soil (Lal, R., Kimble, J. M., Follett, R. F. & Stewart, B. A., eds), pp. 1–10. CRC Press, Boca Raton.
Lettens, S., Van Orshoven, J., Van Wesemael, B., De Vos, B. & Muys, B. 2005. Stocks and fluxes of soil organic carbon for landscape units in Belgium derived from heterogeneous data sets for 1990 and 2000. Geoderma, 127, 11–23.
doi:10.1016/j.geoderma.2004.11.001
Neill, C., Cerri, C. C., Melillo, J. M., Feigl, B. J., Steudler, P. A., Moraes, J. F. L. & Piccolo, M. C. 1998. Stocks and dynamics of soil carbon following deforestation for pasture in Rondonia. In Soil Processes and the Carbon Cycle (Lal, R., Kimble, J. M., Follett, R. F. & Stewart, B. A., eds), pp. 9–28. CRC Press, Boca Raton.
Nemeth, T., Micheli, E. & Paszton, L. 2002. Carbon balances in Hungarian soils. In Agricultural Practices and Policies for Carbon Sequestration in Soil (Kimble, J. M., Lal, R. & Follett, R. F., eds), pp. 449–457. CRC Press, Boca Raton.
Paal, J., Ilomets, M., Fremstad, E., Moen, A., Borset, E., Kuusemets, V., Truus, L. & Leibak, E. 1999. Estonian Wetland Inventory 1997. Eesti Loodusfoto, Tartu, 166+28 pp.
Paustian, K., Collins, H. P. & Paul, E. A. 1997. Management controls on soil carbon. In Soil Organic Matter in Temperate Agroecosystems. Long-Term Experiments in North America (Paul, E. A., Paustian, K., Elliott, E. T. & Cole, C. V., eds), pp. 15–49. CRC Press, Boca Raton.
Percival, H. J., Parfitt, R. L. & Scott, N. A. 2000. Factors controlling soil carbon levels in New Zealand grasslands: Is clay content important? Soil Science Society of America Journal, 64, 1623–1630.
Post, W. M., Emmanuel, W. R., Zinke, P. J. & Stangenberger, G. 1982. Soil carbon pools and world life zones. Nature,298, 156–159.
doi:10.1038/298156a0
Pulleman, M. M., Bouma, J., van Essen, E. A. & Meijles, E. W. 2000. Soil organic matter content as a function of different land use history. Soil Science Society of America Journal, 64, 689–693.
Qiguo, Z., Zhong, L. & Yingfei, X. 1997. Organic carbon storage in soils of southeast China. Nutrient Cycling in Agroecosystems, 49, 229–234.
doi:10.1023/A:1009779724374
Reicosky, D. D. 2002. Long-term effect of moldboard plowing on tillage-induced CO2 loss. In Agricultural Practices and Policies for Carbon Sequestration in Soil (Kimble, J. M., Lal, R. & Follett, R. F., eds), pp. 87–97. CRC Press, Boca Raton.
Robert, M. 2001. Soil Carbon Sequestration for Improved Land Management. World Soil Resources Reports 96. FAO, Rome, 57 pp.
Rusco, E., Jones, R. & Bidoglio, G. 2001. Organic Matter in the Soils of Europe: Present Status and Future Trends. ESB, IES, JRC, Ispra, 14 pp.
Shaffer, M. J. & Ma, L. 2001. Carbon and nitrogen dynamics in upland soils. In Modeling Carbon and Nitrogen Dynamics for Soil Management (Shaffer, M. J., Ma, L. & Hansen, S., eds), pp. 11–29. Lewis Publishers, Boca Raton.
Sleutel, S., De Neve, S. & Hofman, G. 2003. Estimates of carbon stock changes in Belgian cropland. Soil Use and Management, 16, 166–171.
doi:10.1079/SUM2003187
Smith, P., Powlson, D. S., Glendining, M. J. & Smith, J. U. 1997. Opportunities and limitations for C sequestration in European agricultural soils through changes in management. In Management of Carbon Sequestration in Soil(Lal, R., Kimble, J. M., Follett, R. F. & Stewart, B. A., eds), pp. 143–152. CRC Press, Boca Raton.
Smith, P., Powlson, D. S., Smith, J. U., Falloon, P. & Coleman, K. 2000. Revised estimates of the carbon mitigation potential of UK agricultural land. Soil Use and Management, 16, 293–295.
doi:10.1111/j.1475-2743.2000.tb00214.x
[SOE] Statistical Office of Estonia. 2005. Statistical Yearbook of Estonia, 2005. Tallinn.
Tarnocai, C. 1998. The amount of organic carbon in various soil orders and ecological provinces in Canada. In Soil Processes and the Carbon Cycle (Lal, R., Kimble, J. M., Follett, R. F. & Stewart, B. A., eds), pp. 81–92. CRC Press, Boca Raton.
Van Cleve, K. & Powers, R. F. 1995. Soil carbon, soil formation, and ecosystem development. In Carbon Forms and Functions in Forest Soils (McFee, W. V. & Kelly, M., eds), pp. 155–200. SSSA, Madison, Wisconsin.
Van-Camp, L., Bujarrabal, B., Gentile, A. R., Jones, R. J. A., Montanarella, L., Olazabal, C. & Selvaradjou, S. K. 2004. Organic Matter and Biodiversity, Reports of the Technical Working Groups established under the Thematic Strategy for Soil Protection. Vol. III. OOP EC, EUR 21319 EN/3, Luxembourg, 311–496 pp.
Vorobeva, L. A. 1998. Khimicheskij analiz pochv [Chemical analysis of soils]. Moscow University Press, Moscow, 272 pp. [in Russian].
West, T. O. & Post, W. M. 2002. Soil organic carbon sequestration rates by tillage and crop rotation: a global data analysis. Soil Science Society of America Journal, 66, 1930–1946.
Yakimenko, E. Y. 1998. Soil comparative evolution under grasslands and woodlands in the forest zone of Russia. In Management of Carbon Sequestration in Soil (Lal, R., Kimble, J. M., Follett, R. F. & Stewart, B. A., eds), pp. 391–420. CRC Press, Boca Raton.
Zdruli, P., Jones, R. J. A. & Montanarella, L. 2004. Organic Matter in the Soils of Southern Europe. European Soil Bureau Research Report No. 15. OOP EC, EUR 21083 EN, Luxembourg, 16 pp.
Zhou, C., Zhou, Q. & Wang, S. 2003. Estimating and analyzing the spatial distribution of soil organic carbon in China. Ambio, 32, 6–12.
doi:10.1639/0044-7447(2003)032[0006:EAATSD]2.0.CO;2
