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This article in AJ

  1. Vol. 59 No. 5, p. 483-484
    Received: Mar 6, 1967

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A Simple Rapid Test for Nitrogen Dioxide in Silage Gases1

  1. S. T. Dexter2



The presence of nitrogen dioxide, a dangerously poisonous gas sometimes given off in silage fermentation, can be detected by exposure of moistened potassium-iodide-starch test papers to the air in the silo, silo-chute or area. The test paper turns from white to bluish black almost instantly in nitrogen dioxide of moderate concentration and more slowly in very low concentration.

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