Dataset: Broadbalk Weed Survey Data 1991-2021


This dataset consists of the relative frequencies of all plant species ('weeds') recorded on Section 8 of the Broadbalk Wheat Experiment, 1991-2021. Section 8 has not received any herbicides in its history.


The assessment method records the presence of individual weed species in 25 random quadrats (0.1m2) per plot. Each year all 18 plots were surveyed meaning 450 quadrats are assessed per year, usually in June. Frequencies refer to the total number of quadrats in which the species is recorded, the maximum being 25 per plot and 450 across all plots in the section.

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  • Sarah Perryman: Data curator
  • Richard Hull: Data collector
  • Jonathan Storkey: Data collector
  • Sarah Perryman: Data collector

Dataset Access and Conditions

Rights Holder

Rothamsted Research


Creative Commons License This dataset is available under a Creative Commons Attribution Licence (4.0).

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YOU MUST CITE AS: Sarah Perryman, Richard Hull, Jonathan Storkey (0). Dataset: Broadbalk Weed Survey Data 1991-2021 Electronic Rothamsted Archive, Rothamsted Research

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Conditions of Use

Rothamsted relies on the integrity of users to ensure that datasets are used appropriately and Rothamsted Research receives suitable acknowledgment as being the originators of these data. Please review the Conditions of Use before downloading.

This data is recorded & provided by staff of the Weed Ecology Group, Rothamsted Research; Richard Hull, Stephen Moss, Jon Storkey who apply all appropriate quality assurance checks.

For further information and assistance, please contact the e-RA curators, Sarah Perryman and Margaret Glendining using the e-RA email address: