The sampling problem in weed control - are currently applied sampling strategies adequate for site-specific weed control?

M. Backes; D. Schumacher; L. PlÃ¼mer

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The sampling problem in weed control - are currently applied sampling strategies adequate for site-specific weed control?

In: Precision Agriculture â05

Authors:

M. Backes

M. Backes backes@ikg.uni-bonn.de

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D. Schumacher

D. Schumacher
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L. PlÃ¼mer

L. PlÃ¼mer
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Type:: Chapter

Pages:: 155â161

DOI:: https://doi.org/10.3920/978-90-8686-549-9_019

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It is a fact that weeds are distributed heterogeneously in arable fields. They tend to occur in persistent patches. Hence, precision farming strategies are applied in order to respond adequately by applying herbicides site-specifically. The basis for the site-specific decision making processes prior to the application of herbicides are weed distribution maps. They have to be initially generated on the basis of weed surveys if so-called offline strategies are applied. The methodological problem often neglected when applying offline strategies is the question of whether or not these surveys are adequate. In order to verify this strategy, a custom software was implemented in this study offering the opportunity to simulate the sampling process with different input parameters. The counting quadrat area and the sampling grid resolution are customizable. The input datasets for these simulations can be either taken from high-resolution sampling or from simulated populations. The software is also able to simulate weed populations of varying patchiness or aggregated dispersion. The results of this simulation study showed varying correlations between the sampling datasets and the actual weed density at the sampling point reference areas depending on the actual patch size.

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Precision Agriculture â05

E-Book ISBN:: 9789086865499

Publisher:: Wageningen Academic

Print Publication Date:: 24 Oct 2005

Subjects
- Life Sciences
  - General
  - Agriculture & Environment

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The sampling problem in weed control - are currently applied sampling strategies adequate for site-specific weed control?

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Precision Agriculture â05

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Precision Agriculture â05