The experiment tests the effects of four different amounts of lime (creating a soil pH range for approximately 4.5 to 7.5) with and without fertilizer P, on the grain mineral compostion of three arable crops. The site is a silty clay loam soil at Rothamsted Experimental Farm, from 1962-1996. There was a parallel experiment on a sandy loam soil at Woburn Experimental Farm. The dataset contains grain mineral compostion for 20 different minerals (mg/kg dry soil), for individual plots, measured in 1978, 1981 and 1995. It includes details of the lime and fertilizer treatments, and crop yield.
Grain mineral composition was determined, in 2019 and 2020, on archived ground samples grown in 1978 (barley), 1981 (oats) and 1995 (wheat). Macro-nutrients (Ca, K, Mg, Na, P, S) and Al, Fe and Ti were determined by open tube digestion with HNO3/HClO4 and measured with ICP-OES. Micro-nutrients and trace elements (As, Cd, Co, Cr, Cu, Mn, Mo, Ni, Pb, Se, and Zn) were determined with microwave digestion with HNO3/H2O2, then measured with ICP-MS.
This dataset is available under a Creative Commons Attribution Licence (4.0).
YOU MUST CITE AS: Lionel Jordan_Meille, Jonathan Holland, Steve McGrath, Margaret Glendining, Cathy Thomas, Stephan Haefele (2021). Dataset: Rothamsted long-term liming experiment grain mineral composition Electronic Rothamsted Archive, Rothamsted Research 10.23637/rcs10-rltlgrain-01
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Note the included Excel file: 01-RothLTliming-grain.xlsx contains the same data as the below CSV files. The Excel file contains each of the below CSV files as an Excel worksheet and is provided for users who prefer Excel over CSV.
|README.html||Readme||File describing and explaining all details of the dataset (html)|
|README.txt||Readme||File describing and explaining all details of the dataset (txt)|
|grain_data.csv||Grain mineral data||The main data table containing grain mineral concentrations in barley, oats and wheat, 1978, 1981 and 1995. Includes treatments and crop yields.|
|crop_types_data.csv||Crop types||List of crops grown with Latin names and AGROVOC concepts.|
|liming_factor_data.csv||Liming treatment factor level descriptions||Describes the different liming treatment factor levels used, showing the total amounts applied over the experiment.|
|p_factor_data.csv||P treatment factor level descriptions||Describes the different P treatment factor levels used: Period 1 (1962-1980) when two P rates (0 and P) were applied annually; Period 2 (1981-1996) when four P treatments (P0, P1, P2 and P3) were applied three or four times only.|
|k_factor_data.csv||K treatment factor level descriptions||Describes the different K treatment factor levels used, 1962-1978|
|mn_factor_data.csv||Mn treatment factor level descriptions||Describes the different Mn treatment factor levels used, 1987-1990|
|notes_data.csv||Notes||Additional explanatory notes for records in the crop_data table|
The original archived grain samples were stored in the Rothamsted Sample Archive. The chemical analysis was carried out in the Analytical Unit of Rothamsted Research in 2019 and 2020.
For further information and assistance, please contact the e-RA curators, Sarah Perryman and Margaret Glendining using the e-RA email address: firstname.lastname@example.org