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This article in SSSAJ

  1. Vol. 53 No. 1, p. 34-38
     
    Received: Dec 21, 1987


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doi:10.2136/sssaj1989.03615995005300010007x

A Computer Simulation of Fe(III) and Fe(II) Complexation in Nutrient Solutions: II. Application to Growing Plants

  1. A. P. Schwab  and
  2. W. L. Lindsay
  1. Dep. of Agronomy, Kansas State Univ., Manhattan, KS 66506
    Dep. of Agronomy, Colorado State Univ., Fort Collins, CO 80523

Abstract

Abstract

A computer model developed by the authors accurately predicted the chelation of ferrous and ferric ion as a function of pH and redox potential in nutrient solutions. Experiments were conducted to establish the apparent redox potential (4 < pe + pH < 7) imposed by roots of efficient and inefficient soybean plants (Glycine max L.). Using this information, equilibrium Fe2+ concentrations were controlled by adjusting the concentrations of the chelating agents. Iron-59 uptake was correlated with log[Fe2+] for concentrations between 10−6.5 and 10−9.2 mol Fe2+/L in the experimental nutrient solutions.

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