Dataset: Park Grass Hay Yields, Fertilizer and Lime Treatments 1965-2018
- DOI: 10.23637/rpg5-yields1965-2018-01
- Experiment: Parkgrass
- Files included in the download:
- Park Grass Hay Yields 1965-2018 (xlsx)
- Version: 1.0
- Created: 2021-12-09
- Keywords: fertilizer - fertilizer - Rothamsted Research - soil pH - long term experiments - Park grass long-term experiment - crop yield - liming - permanent grassland
- Author(s): Sarah Perryman, Richard Ostler
- Publisher: Electronic Rothamsted Archive, Rothamsted Research
Example data derived from the dataset - plot 3 (no fertilizer or manure)
Summary
This dataset contains the yields of hay (t/ha), for both the 1st and 2nd cuts, harvested from Park Grass Hay Experiment since 1965-2018. Details of the fertilizer, lime treatments and harvest dates are also included. In 1965, a new liming regime was introduced with four sub-plots per plot (a. at pH 7, b. at pH 6, c. at pH 5 and d. un-limed). Yields are provided for all fertiliser treatment plots and sub-plots (except for plots 5 and 6 cd, which were used for micro-plot experiments). Yields are expressed as t/ha at 100% dry matter. Variations in yield reflect the various fertilizer treatments and liming regimes, as well as the local weather and atmospheric inputs.
Methods
This experiment tests the effects of inorganic fertilizers, organic fertilizers and soil pH (which varies on sub-plots as a result of liming) on yields of hay. See Third Design Period 1965- for detail. The yields are estimated from strips cut from the centre of each plot with a forage harvester (since 1960). After the first cut in mid-June the remainder of each plot is mown and made into hay, continuing earlier management and ensuring return of seed. For the second cut, the whole of each plot is cut with a forage harvester.
Technical Information
Hay yields have been recorded every year since the Park Grass experiment began, with the first harvest in 1856. Dried samples have also been kept since 1856 and these are preserved in the Rothamsted Sample Archive.
Related Documents
- Park Grass Experiment lime treatments 1856-2021 :
- Park Grass experiment plan and treatments since 1965, updated 2018 :
- Silvertown et al. (2006) The Park Grass Experiment 1856 - 2006: its contribution to ecology :
- Jenkinson et al. (1994) Trends in herbage yields over the last century :
- Bowley et al. (2017) Historical trends in iodine and selenium in soil and herbage at ark Grass :
Related Datasets
- Park Grass Changes in Mean Species Numbers 1864-2011
- Park Grass Soil pH 1856-2011
- Dataset: Park Grass Species, Fertilizer and Lime Treatments 1991-2000
- Dataset: Park Grass Hay Yields, Fertilizer and Lime Treatments 1903-1964
Contributors
- Sarah Perryman: Data curator
- Margaret Glendining: Data curator
- Andrew Macdonald: Project manager
- Paul Poulton: Project manager
- Richard Ostler: Project leader
- Nathalie Castells: Data manager
- Chris Hall: 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: Sarah Perryman, Richard Ostler (2021). Dataset: Park Grass Hay Yields, Fertilizer and Lime Treatments 1965-2018 Electronic Rothamsted Archive, Rothamsted Research https://doi.org/10.23637/rpg5-yields1965-2018-01
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
An Excel file, rpg5_yields_1965-2018_01.xlsx, contains Park Grass fertilizer and lime treatments and the yileds for the 1st and 2nd cuts. Frictionless CSV files are provided for users who prefer CSV over Excel files.
Individual plot yields are derived from the PGHAYEQUIV dataset in the e-RA database and were checked with the published yields in the annual Rothamsted Yield Books.
This Frictionless dataset of combined yield and treatment data was compiled by S. Perryman & R. Ostler and checked by M. Glendining September 2021.
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.
Park Grass was initiated to investigate the ways of improving the yield of hay by the application of inorganic fertilizers and organic manure. With time, the soil became more acidic and in 1903 plots had been halved and the effects of lime tested. From 1965 a new liming regime was initiated with four sub-plots, three receiving lime to maintain soil pH (0-23cm depth) at pH 7, 6, and 5 on sub-plots a, b and c. Sub-plot d does not receive any lime. The change in harvest method in 1960 means recorded yields of dry matter are larger than previously as fewer losses occur. The previous harvest method estimated yield by weighing the produce from the whole field. See reference by Bowley et al (2017).
- The dataset Dataset: Park Grass Hay Yields, Fertilizer and Lime Treatments 1965-2018 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