Dataset: Broadbalk Wheat annual grain and straw yields 1852-1925
- DOI: 10.23637/rbk1-1796346264-1
- Experiment: Broadbalk
- Files included in the download:
- Frictionless data package containing the yield data described here (zip)
- Version: 1.0
- Created: 2020-01-17
- Published: 2021-07-07
- Updated: 2021-07-21
- Keywords: wheat - Rothamsted Research - Broadbalk long-term experiment - arable farming - long term experiments - straw - grain yield
- Author(s): Rothamsted Research
- Publisher: Electronic Rothamsted Archive, Rothamsted Research, Harpenden, UK
Summary
Mean annual grain and straw yields for each treatment strip of the Broadbalk Wheat Experiment, 1852-1925. Also other agronomic information, including sowing and harvest dates, amount, type and date of application of treatments, and winter wheat cultivars.
Methods
The treatment strips (plots) extend the whole length of the field, each testing a different fertilizer or manure treatment. In some years, the strips were divided into two or more sub-plots. Annual yield data presented here for each strip is the mean of all sub-plots, except when the fertilizer treatments were different (plots 9a and 9b, 15a and 15b, selected years), or if a sub-plot received a different treatment for one year, when it was excluded from the mean. See 'Broadbalk plan and cropping 1852-1925' for full details. Yield data from 1844-1851 is not included, as the fertilizer treatments were not fully established until 1852.
Technical Information
Wheat grain and straw yields have been recorded every year since the experiment began, with the first harvest in 1844 (the crop was sown in autumn 1843). Dried grain and straw samples have also been kept for chemical analysis since 1844; these are preserved in the Rothamsted Sample Archive. Yields are expressed at field moisture content, approximately 85% dry matter.
Related Documents
- Broadbalk Wheat plan and cropping 1852-1925 :
- Johnson and Garner (1969). The Broadbalk wheat experiment. Historical Introduction :
- Broadbalk Fertilizer and Manure Treatments 1852-2021 :
- Rothamsted (1970) Details of the Classical and Long-term experiments up to 1967 :
Related Datasets
- Broadbalk mean long-term winter wheat yields 1852-2016
- Fisher 1921 Broadbalk wheat grain yields 1852-1918
Contributors
- Sarah Perryman: Data curator
- Margaret Glendining: Data curator
- Andrew Macdonald: Project leader
- Paul Poulton: Researcher
- Richard Ostler: Project manager
- Nathalie Castells: Data manager
- Ben Charlston: Data collector
Dataset Access and Conditions
Rights Holder
Rothamsted Research
License
This dataset is
available under a Creative Commons
Attribution Licence (4.0).
Cite this Dataset
YOU MUST CITE AS: Rothamsted Research (2021). Dataset: Broadbalk Wheat annual grain and straw yields 1852-1925 Electronic Rothamsted Archive, Rothamsted Research, Harpenden, UK https://doi.org/10.23637/rbk1-1796346264-1
Please review our How to Credit Datasets guidance for more information.
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.
Table Of Contents
Note the Excel file: 01-BKyield1852-1925.xlsx contains the same data as the CSV files listed below. The Excel file contains each of the CSV files as an Excel worksheet and is provided for users who prefer Excel over CSV.
Contents
| File | Dataset Name | Description |
|---|---|---|
| README.html | Read me | File describing and explaining all details of the dataset (html) |
| README.txt | Read me | File describing and explaining all details of the dataset (txt) |
| crop_data.csv | crop yield data | The main data table containing mean annual grain and straw yield data for all strips (plots) and details of all fertilizer and manure treatments, 1852-1925. Also other agronomic information, including sowing and harvest dates, amount, type and date of application of treatments, and winter wheat cultivars. The strips extended the whole length of the field; each strip tested a different fertilizer or manure treatment. Most strips were divided into two or more sub-plots for many of the years 1852-1925. Annual yield data for each strip (plot) is the mean of all sub-plots, except when the fertilizer treatments were different (plots 9a and 9b, 15a and 15b, notes 6-7). If a sub-plot received a different treatment for one year it was excluded from the mean (notes 2-4). See notes and plan for full details. |
| fym_factor_data.csv | FYM treatment factor level description | Describes the FYM (farmyard manure) treatment factor levels used |
| rape_cake_factor_data.csv | Rape cake treatment factor level description | Describes the rape cake (a type of organic manure) treatment factor levels used |
| n_factor_data.csv | N fertilizer treatment factor level descriptions | Describes the different N (nitrogen) fertilizer treatment factor levels used |
| p_factor_data.csv | P fertilizer treatment factor level descriptions | Describes the P (phosphorus) fertilizer treatment factor levels used |
| k_factor_data.csv | K fertilizer treatment factor level descriptions | Describes the K (potassium) fertilizer treatment factor levels used |
| na_factor_data.csv | Na fertilizer treatment factor level descriptions | Describes the Na (sodium) fertilizer treatment factor levels used |
| mg_factor_data.csv | Mg fertilizer treatment factor level descriptions | Describes the Mg (magnesium) fertilizer treatment factor levels used |
| notes_data.csv | Notes | Additional explanatory notes for records in the crop_data table, including details of sub-plots. |
Mean yields are derived from the individual sub-plot yields of grain and straw in the BKYIELD dataset in the e-RA database. The Broadbalk 'White Books' , held in the Rothamsted Library Archive, were used to check the treatments applied to the sub-plots.
In accordance with the Joint Code of Practice for Research at Rothamsted, data processing in e-RA follow rigorous standard operating procedures to ensure the quality and correctness of data collected in the field through to depositing in the e-RA database. To ensure quality control during data inputting, the data sets were typed on two separate occasions (double data entry). During the second typing (verification) the data values were compared with those typed on the earlier occasion, and any discrepancies were resolved before verification continued. This procedure also set out how to handle situations where the written records were illegible or ambiguous. This procedure avoided visual checking of data, which can be very inaccurate. Once the data were entered into e-RA, they were independently back-checked against the original data sheets.
Individual sub-plot data can be accessed from the BKYIELD dataset in the e-RA database.
- The dataset Broadbalk Wheat annual grain and straw yields 1852-1925 is a published dataset from the e-RA Database. e-RA is part of the Rothamsted Long-Term Experiments - National Bioscience Research Infrastructure (RLTE-NBRI), which also covers maintenance of the Long-Term Experiments, the Rothamsted Sample Archive and Rothamsted's environmental monitoring activities including the weather stations and its role in the UK Environmental Change Network
- The RLTE-NBRI is funded by UK Research and Innovation - Biotechnology and Biological Sciences Research Council (UKRI-BBSRC) under award BBS/E/RH/23NB0007 (2023-2028). The RLTE-NBRI is also supported by the Lawes Agricultural Trust. e-RA has been part of a National Capability since 2012, previous awards from the BBSRC were Grants BBS/E/C/00005189 (2012-2017) and BBS/E/C/000J0300 (2017-2022)
For further information and assistance, please contact the e-RA curators, Sarah Perryman and Margaret Glendining using the e-RA email address: era@rothamsted.ac.uk