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Soil Aeration and Plant Root Relations: IV. Testing the Cylindrical Shell Model in the Transient Case¹

ABSTRACT

This is a further study of the model of oxygen diffusion through a liquid cylindrical shell to plant roots, and the use of an oxygen cathode made of platinum wire to evaluate the resistance to diffusion. The transient current to the oxygen cathode is here analyzed mathematically, and the results compared to new measurements. Differences are believed due to an inadequate representation of the geometry of the soil-air interface.

¹ Contribution from the Soil and Water Conservation Research Division, ARS, USDA, and the New York State Agr. Exp. Sta. at Cornell University, Ithaca, N. Y., Cornell University Dept. of Agronomy Paper No. 539.

² Research Soil Scientist, USDA, and Research Soil Scientist USDA and Associate Professor, Cornell University, respectively.

Received for publication January 11, 1962. Accepted for publication February 15, 1962.