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This article in SSSAJ

  1. Vol. 40 No. 3, p. 468-470
    Received: Oct 20, 1975
    Accepted: Feb 27, 1976

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Estimate of Organic Carbon in World Soils1

  1. Hinrich L. Bohn2



The current estimate of organic carbon in world soils, 7.1 × 1014 kg, is based on such meager data that it must be viewed skeptically. The FAO-UNESCO soil map and other recent soil data indicate that the amount of organic soil carbon is about 30 × 1014 kg. This new estimate should allow more accurate portrayal of the role of soil carbon in the carbon cycle.

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