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This article in SSSAJ

  1. Vol. 52 No. 4, p. 1186-1187
    Received: June 22, 1987

    * Corresponding author(s):
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Length of Incubation Time Affects the Parameter Values of the Double Exponential Model of Nitrogen Mineralization

  1. M. L. Cabrera  and
  2. D. E. Kissel
  1. Department of Agronomy, Throckmorton Hall, Kansas State Univ., Manhattan, KS 66506



The double exponential model has been used to describe nitrogen N mineralization in disturbed soil samples, allowing the separation of two N pools that mineralize according to first-order kinetics. We fitted the model to data from various incubation times to study the effect of incubation time on the parameter values of the model. In general, as the incubation time increased, the apparent size of the two N pools increased, whereas their rate constants of mineralization decreased. These results call for caution when comparing parameter values obtained with different incubation times.

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