The variability in spatial distribution of Galium aparine L.

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41210%2F07%3A22170" target="_blank" >RIV/60460709:41210/07:22170 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

The variability in spatial distribution of Galium aparine L.

Original language description

This study is dealing with the impact of weed distribution variability and the arrangement of subsamples on the accuracy of the estimation of the Galium aparine population. Rectangular areas of 400 m2 and 600 m2 were defined within a winter wheat field in 2004 and 2006 respectively and the spatial positions of all G. aparine seedlings in the plots were recorded using a coordinate system. Continual sampling with the use of 1 m x 1 m sampling quadrate was simulated and the semivariograms for parallel andperpendicular direction were calculated. On the above two areas, 289 squares at 3 m x 3 m each were created. In each square, sampling with many spatial alignments of four partial samples was simulated. The estimated values of each sampling method were compared with the mean weed density by Pearson`s correlation coefficient. Geostatistical analysis showed, that the range of spatial dependence varied strongly with the sampling direction. Semivariograms showed stronger spatial continuity al

Czech name

Variabilita prostorového uspořádání populace Galium aparine L.

Czech description

This study is dealing with the impact of weed distribution variability and the arrangement of subsamples on the accuracy of the estimation of the Galium aparine population. Rectangular areas of 400 m2 and 600 m2 were defined within a winter wheat field in 2004 and 2006 respectively and the spatial positions of all G. aparine seedlings in the plots were recorded using a coordinate system. Continual sampling with the use of 1 m x 1 m sampling quadrate was simulated and the semivariograms for parallel andperpendicular direction were calculated. On the above two areas, 289 squares at 3 m x 3 m each were created. In each square, sampling with many spatial alignments of four partial samples was simulated. The estimated values of each sampling method were compared with the mean weed density by Pearson`s correlation coefficient. Geostatistical analysis showed, that the range of spatial dependence varied strongly with the sampling direction. Semivariograms showed stronger spatial continuity al

Type

D - Article in proceedings

CEP classification

GF - Diseases, pests, weeds and plant protection

OECD FORD branch

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Project

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Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2007

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

14th EWRS Symposium

ISBN

978-90-809789-2-8

ISSN

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e-ISSN

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Number of pages

1

Pages from-to

128-128

Publisher name

European Weed Research Society

Place of publication

Oslo

Event location

Hamar, Norway

Event date

Jun 18, 2007

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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