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    Author(s): Robert F. Tarrant
    Date: 1953
    Source: PNW Old Series Research Notes No. 90: 5 p.
    Publication Series: Scientific Journal (JRNL)
    Station: Pacific Northwest Research Station
    PDF: View PDF  (300 KB)


    Intensity of a slash burn is often judged by the change in soil color. Reddened or yellowed areas of soil and charred patches of organic litter are found on most burned areas, but such color changes are difficult to interpret. A study was therefore made to explore two questions:

    (1) At what temperature does the color of mineral soil change to the reddish or yellowish hues found on severely burned spots?
    (2) How do high temperatures of varying duration affect soil reaction (pH)?

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    Tarrant, Robert F. 1953. Effect of heat on soil color and pH of two forest soils. PNW Old Series Research Notes No. 90: 5 p.

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