Journal ArticleDOI
Spatial correlation between weed species densities and soil properties.
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TLDR
The spatial cross-correlation between weed species densities and six soil properties within fields was analysed and indicated that the weed pattern is field-specific and that the spatial variation in soil property within a field is one of several factors affecting weed patchiness.Abstract:
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.read more
Citations
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Journal ArticleDOI
Beta diversity at different spatial scales: plant communities in organic and conventional agriculture.
TL;DR: The results show that organic farming made the greatest contribution to total species richness at the meso (among fields) and macro scale due to environmental heterogeneity, and agri-environment schemes should exploit this large-scale contribution by tailoring schemes at regional scales to maximize dissimilarity between conservation areas using geographic information systems.
Journal ArticleDOI
Local diversity of arable weeds increases with landscape complexity
TL;DR: The hypothesis that local plant species richness in arable fields is greatly influenced by processes operating at the landscape scale is supported by analysing the relationship between landscape complexity and local species richness of arable weeds in wheat fields.
BookDOI
Geostatistical Applications for Precision Agriculture
TL;DR: In this article, the authors present a case study of NDVI Mapping for a Dutch potato field and use the variogram to guide sampling for bulking and to improve predictions from sparse sampling.
Journal ArticleDOI
Soil heterogeneity at the field scale: a challenge for precision crop protection
Stefan Pätzold,Franz Michael Mertens,Ludger Bornemann,Britta Koleczek,Jonas Franke,Hannes Feilhauer,Gerhard Welp +6 more
TL;DR: In this paper, a survey of arable fields near Bonn (Germany) revealed widespread within-field heterogeneity of texture-related ECa, soil organic carbon (SOC) and other characteristics.
Journal ArticleDOI
Yield loss due to weeds in cereals and its large-scale variability in Sweden.
Per Milberg,E Hallgren +1 more
TL;DR: The weeds could be ranked from the most benign to the most detrimental for cereal yields in Sweden, and the worst weed species in autumn-sown crops were Capsella bursa-pastoris and Matricaria perforata.
References
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Book ChapterDOI
Application of Geostatistics to Spatial Studies of Soil Properties
TL;DR: Geostatistical analysis of spatial variability is applied to estimation of ore reserves in the mining industry, water resources research, soil science, and archaeology as mentioned in this paper, and identifies some future applications of geostatistics to spatial studies in soil and agronomic research.
Journal ArticleDOI
The Effects of Seed Burial and Soil Disturbance on Emergence and Survival of Arable Weeds in Relation to Minimal Cultivation
TL;DR: It is concluded that the majority of annual grass-weeds, despite having little innate dormancy, will continue to be encouraged by current agronomic practices and many annual dicotyledonous species will decline in importance.
Journal ArticleDOI
Soil properties affecting the distribution of 37 weed species in Danish fields
TL;DR: Crop type and soil clay content were generally those explanatory variables that had the greatest influence on occurrence of the weed species, but all other factors examined also had an effect on the occurrence of some weed species.
Journal ArticleDOI
A technique for mapping the spatial distribution of Elymus repots, with estimates of the potential reduction in herbicide usage from patch spraying
TL;DR: In this article, the spatial distribution of E. repens was mapped in five cereal fields during the 1994 season using a semi-automated system mounted on a vehicle that travelled up the tramlines, centred on a 12m wide spray boom.
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Soil properties affecting the distribution of 37 weed species in Danish fields
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