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    Changes in water infiltration capacities following the application of a wetting agent on a ponderosa pine forest floor

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    Author
    Kaplan, Marc Gabriel,1947-
    Issue Date
    1973
    Keywords
    Hydrology.
    Soil absorption and adsorption.
    Forest management.
    Surface active agents.
    Ponderosa pine -- Ecology.
    Committee Chair
    Zwolinski, Malcolm J.
    
    Metadata
    Show full item record
    Publisher
    The University of Arizona.
    Rights
    Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
    Abstract
    An infiltration-wetting agent study, using the wetting agent "WATER-IN", was conducted in the ponderosa pine forest type of east central Arizona, near McNary, Arizona. An application rate of 10 gallons of wetting agent per surface acre was used both on bare mineral soil and on ponderosa pine litter. The infiltration rate was measured by a modified North Fork infiltrometer. It was found that "WATER-IN" significantly increased water runoff, when applied to litter, but when applied to bare mineral soil, "WATER-IN" caused a significant increase in water infiltration. The wetting agent did not significantly affect antecedent moisture, soil particle distribution, litter water holding capacity, or litter bulk density. It is presently hypothesized that the increase in water infiltration on treated bare mineral soil is due to a decrease in the average bulk density of the surface inch of soil. The data strongly suggests this hypothesis to be correct. The increase in runoff when litter is treated is probably due to an interaction, either physical, chemical, or both, between the humus layer and "WATER-IN", creating a hydrophobic condition where one did not exist before.
    Type
    Thesis-Reproduction (electronic)
    text
    Degree Name
    M.S.
    Degree Level
    masters
    Degree Program
    Watershed Management
    Graduate College
    Degree Grantor
    University of Arizona
    Collections
    Master's Theses

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