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Research ArticleArticles

Summer Irrigation of Established Oak Trees

Gary W. Hickman
Arboriculture & Urban Forestry (AUF) January 1993, 19 (1) 35-37; DOI: https://doi.org/10.48044/jauf.1993.006
Gary W. Hickman
University of California, Cooperative Extension, 420 S. Wilson Way, Stockton, CA 95205
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Article Figures & Data

Tables

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    Table 1.

    Tree condition

    AreaGood-FairSerious decline or deadTotal trees%Serious decline or dead
    1988
    Near irrigation2463020.0
    Non-irrigated577813557.8
    X2 = 12.55
    P < .01
    1992
    Near irrigation2283026.7
    Non-irrigated379813572.6
    X=2 20.58
    P <.01
    • View popup
    Table 2.

    Drip irrigation trial

    IrrigationNo new shoot growthNew shoot growthTotal trees% New growth
    4 weeks after irrigation
    Drip481266.7
    None120120
    X2 = 9.19
    P <.01
    5 weeks after irrigation
    Drip1111291.7
    None1021216.7
    X2 = 10.74
    P <.01
    Change in Vigor from 1988 to 1992
    Improved growthNo change or declineTotal trees% no change
    Drip1021216.7
    None1111291.7
    X2 = 10.74
    P <.01
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Arboriculture & Urban Forestry (AUF)
Vol. 19, Issue 1
January 1993
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Summer Irrigation of Established Oak Trees
Gary W. Hickman
Arboriculture & Urban Forestry (AUF) Jan 1993, 19 (1) 35-37; DOI: 10.48044/jauf.1993.006

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Summer Irrigation of Established Oak Trees
Gary W. Hickman
Arboriculture & Urban Forestry (AUF) Jan 1993, 19 (1) 35-37; DOI: 10.48044/jauf.1993.006
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