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A Method for Measuring Oxygen and Carbon Dioxide in Soil¹

ABSTRACT

A simple rubber membrane gas sampling device is described for measuring soil oxygen and carbon dioxide levels. The O₂ measurements are compared to results from the Pt electrode method and found to show similar trends when soil respiration was low. The membrane sensor samples a larger volume of soil and so its results have lesser coefficients of variation than do oxygen diffusion rate (ODR) measurements with Pt electrodes.

¹ Joint contribution from the Agricultural Research Service, USDA, Kimberly, Idaho, and the University of Idaho, College of Agriculture Research and Extension Center, Aberdeen.

² Soil Scientist, Snake River Conservation Research Center, Kimberly, ID 83341, and Assistant Research Soil Scientist, formerly University of Idaho Research and Extension Center, Aberdeen, ID 83210.

Received for publication March 18, 1982. Accepted for publication August 13, 1982.