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  • 1
    Electronic Resource
    Electronic Resource
    Oxford UK : Blackwell Publishing Ltd.
    Weed research 42 (2002), S. 0 
    ISSN: 1365-3180
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The spatial cross-correlation between weed species densities and six soil properties within fields was analysed using cross-semivariograms. The survey was carried out in three successive years in two fields. The most consistent relationship between weed species density (numbers m−2) and soil properties was negative cross-correlation between the density of Viola arvensis Murray and clay content. This correlation was found in both fields; however, the range of spatial dependence varied between fields. In one of the fields, the density of Lamium purpureum L. was positively cross-correlated with the phosphorus content in the soil in all years. The density of Veronica spp. and Poa annua L. was negatively cross-correlated with pH in all three years. Other spatial cross-correlations that were found in this study were inconsistent over time or field site. The densities of some of the weed species were spatially cross-correlated with more than one soil property. The results showed that the range of spatial dependence varied not only between fields, but also between weed species and soil properties, as well as between years. This study indicates that the weed pattern is field-specific and that the spatial variation in soil properties within a field is one of several factors affecting weed patchiness.
    Type of Medium: Electronic Resource
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  • 2
    Map available for loan
    Map available for loan
    Stuttgart : Bundesanstalt für Geowissenschaften und Rohstoffe
    Associated volumes
    Call number: K 94.0022 / Fach 23
    In: Geologische Übersichtskarte
    Type of Medium: Map available for loan
    Location: Upper compact magazine
    Branch Library: GFZ Library
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