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    Author(s): W. Lopushinsky; G.O. Klock
    Date: 1990
    Source: Res. Note PNW-RN-496. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 12 p
    Publication Series: Research Note (RN)
    Station: Pacific Northwest Research Station
    PDF: View PDF  (473 KB)

    Description

    Seasonal trends of soil water content in plots of snowbrush (Ceanothus velutinus Dougl.), orchard grass (Dactylis glomerata L), and pinegrass (Calamagrostis rubes- cens Buckl.) and in bare plots were measured on a burned-over forest watershed in north-central Washington. A comparison of soil water contents at depths of 12, 24, 36, and 48 inches indicated that the grasses and snowbrush generally used similar amounts of soil water; although during midsummer, water content at 12 inches in - pinegrass plots was significantly lower than that in snowbrush plots, which indicated greater water use by pinegrass. From the soil surface to a depth of 24 inches, soil water content in snowbrush plots was similar to that in bare plots during most of the summer, thereby suggesting that snowbrush may not be a serious competitor for soil moisture during the initial establishment of conifer seedlings. Pinegrass probably has the greatest potential to be a more serious competitor for soil moisture with newly planted conifer seedlings than either orchard grass or snowbrush.

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    Citation

    Lopushinsky, W.; Klock, G.O. 1990. Soil water use by Ceanothus velutinus and two grasses. Res. Note PNW-RN-496. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 12 p

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    Keywords

    Orchard grass, pinegrass, reforestation, site preparation

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