Dataset: Woburn long-term liming experiment exchangeable cations re-analysed

Citation:  Cathy Thomas, Jonathan Holland, Margaret Glendining, Stephan Haefele (2023). Dataset: Woburn long-term liming experiment exchangeable cations re-analysed Electronic Rothamsted Archive, Rothamsted Research, Harpenden, UK DOI : https://doi.org/10.23637/wsc10-wltlcation-01.
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Summary

The experiment tests the effects of different amounts of lime (and thus soil pH), P and K on a sequence of arable crops, on a sandy soil at Woburn Experimental Farm, from 1962-1996. Archived topsoil samples from six years between 1964 and 1989 were re-analysed in 2019 for a range of soil exchangeable cations, by extraction with ammonium nitrate (NH4NO3). There is a parallel experiment at Rothamsted Experimental Farm. This experiment was discontinued in 1997.

Methods

Period 1 (1962-1980): four lime levels with and without fertilizer P and K. Period 2 (1981-1996): four lime levels with four P levels. 2 replicates (blocks).

  • Topsoil (0-18 or 0-23cm) sampled in 1964, 1967, 1974, 1979, 1983 and 1989
  • 12-20 soil cores taken from the central area of each plot and combined to make one sample
  • Soil samples taken in autumn, after harvest and before ploughing for the next crop
  • Archived air-dried sieved (<2mm) soils re-analysed in 2019.
  • Exchangeable cations Al, Ca, Cu, Fe, K, Mg, Mn, Na and Zn, mg/kg dry soil
  • Measured by extraction with 1 M ammonium nitrate (NH4NO3).
  • Cations detected by ICP-OES (Inductively Coupled Plasma - Optical Emission Spectrometer).
  • Negative values shown as zero.

Technical Information

Detection limits (DL) of the ICP-OES. These values provide an indication of the lower values for detection by the ICP-OES. DL (mg/kg dry soil) is calculated as 3x standard deviation of blanks.

              Al           Ca         Cu         Fe         K         Mg         Mn         Na         Zn    
DL 0.33 1.43 0.02 0.23 3.18 0.21 0.06 0.76 0.02

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Contributors

  • Margaret Glendining: Data curator
  • Nathalie Castells: Data manager
  • Jonathan Holland: Researcher
  • Cathy Thomas: Researcher
  • Stephan Haefele: Project leader
  • Mark Durenkamp: Data collector

Dataset Access and Conditions

Rights Holder

Rothamsted Research

License

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

Cite this Dataset

YOU MUST CITE AS: Cathy Thomas, Jonathan Holland, Margaret Glendining, Stephan Haefele (2023). Dataset: Woburn long-term liming experiment exchangeable cations re-analysed Electronic Rothamsted Archive, Rothamsted Research, Harpenden, UK https://doi.org/10.23637/wsc10-wltlcation-01

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Conditions of Use

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Table Of Contents

Note the included Excel file: 01-WLTLCATION.xlsx contains the same data as the CSV files 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
soil_data.csv Soil data The main data table containing soil exchangeable cation data for archived soil sampled in 1964, 1967, 1974, 1979, 1983 and 1989, re-analysed in 2019. Topsoil was analysed from all plots and sub-plots (where present), except sub-plots given Mg in 1974-1978. Exchangeable cation extraction by ammonium-nitrate method. Cations were detected by ICP-OES. Any negative values were converted to zero.
liming_factor_data.csv Liming treatment factor level descriptions Describes the different liming treatment factor levels used, 1962-1996.
p_factor_data.csv P treatment factor level descriptions Describes the different P treatment factor levels used, 1962-1996.
k_factor_data.csv K treatment factor level descriptions Describes the different K treatment factor levels used, 1962-1980. From 1981 basal K was applied to all plots.
detection_limit_data.csv Detection limit data Describes the limits of detection of the ICP-OES for each cation.
notes_data.csv Notes Additional explanatory notes for records in the soil_data table

The original archived soil samples were stored in the Rothamsted Sample Archive. The chemical analysis was carried out in the Analytical Unit of Rothamsted Research in 2019.

The Analytical Chemistry Unit follows the Joint Code of Practice (JCoPR) and participates in European Quality Assurance programmes. All performance is strictly monitored using certified external standards alongside in-house standard materials. Standards and check samples are monitored and recorded.

  • The dataset Woburn long-term liming experiment exchangeable cations re-analysed 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)

Additional Funding sources

This project received specific funding from the following sources

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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