Example barley yields derived from the data. Fallow (no crop) 1927, 1928, 1934 and 1935.
Annual spring barley grain and straw yields for all plots and sub-plots of the Woburn Continuous Barley Experiment, 1927-1942, with treatment details. Also grain hectolitre weights, a measure of grain quality. This experiment is a companion to the Woburn Continuous Wheat experiment.
The Woburn Continuous Barley Experiment was started in 1877, with a range of fertilizer and manure treatments applied until 1926. No fertilizer was applied 1927-1940 (except to some plots in 1931 and 1932), and during this period the experiment was used to look at the residual effects of fertilizer applied from 1877-1926. In 1941 and 1942, basal N fertilizer was applied at the same rate to all plots. The plots were divided in half in 1931 and 1932 to test two spring barley cultivars. The whole experiment was fallowed to control weeds (no crop sown) in 1927, 1928, 1934 and 1935.
Harvested barley grain and straw yields at 85% dry matter. Fallow (no crop) yields shown as blank cell. If a crop was sown but it failed, yield shown as 0.0. Straw yield does not include the stubble or all the chaff. Hectolitre weight, kg of grain per 100 litres, calculated from bushel weight, assuming 1 bushel is 36.369 litres.
This dataset is available under a Creative Commons Attribution Licence (4.0).
YOU MUST CITE AS: Daniel Philcox, June Kimori, Margaret Glendining (2022). Dataset: Woburn Continuous Barley Experiment yields 1927-1942 Electronic Rothamsted Archive, Rothamsted Research https://doi.org/10.23637/wxb6-yield2742-01
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Individual plot yields were taken from Rothamsted Experimental Station Annual Reports, 1927-1938 and Yield Books 1939-1942. Agronomic information (sow dates, cultivar, etc) taken from Annual Reports, Yield Books, plans and descriptions in the Rothamsted Library archives. The frictionless dataset of combined yields and treatment data was compiled by Daniel Philcox and checked by June Kimori and Margaret Glendining, July 2022.
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 avoided visual checking of data, which can be very inaccurate.
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