November 4, 2025 Dataset Open Access

Pospiech, Solveig; Middleton, Maarit

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{
  "identifier": "https://doi.org/10.14278/rodare.4073", 
  "creator": [
    {
      "affiliation": "HZDR", 
      "@type": "Person", 
      "@id": "https://orcid.org/0000-0003-2727-2375", 
      "name": "Pospiech, Solveig"
    }, 
    {
      "affiliation": "Geological Survey of Finland: Rovaniemi, FI", 
      "@type": "Person", 
      "@id": "https://orcid.org/0000-0002-9117-7690", 
      "name": "Middleton, Maarit"
    }
  ], 
  "description": "<p>Plant\u2011Soil Chemistry Dataset (Raja 2019 Field Campaign)</p>\n\n<p>## 1. Overview&nbsp;&nbsp;</p>\n\n<p>This repository contains the **final, cleaned chemistry data** that were produced from the 2019 Raja field campaign.&nbsp;&nbsp;<br>\nThe data combine:</p>\n\n<p>* Plant tissue concentrations (leaf, bark, needles, &hellip;) for a set of selected elements.&nbsp;&nbsp;<br>\n* Corresponding soil\u2011till depth, point location, lithology and basic tree information.&nbsp;&nbsp;<br>\n* Element\u2011specific relative\u2011standard\u2011deviation (RSD) uncertainties that were calculated from laboratory\u2011derived uncertainty parameters.</p>\n\n<p>All files are provided in **CSV** format (UTF\u20118, `,` separator) and/or the R programming language binary format RData.</p>\n\n<p>*The exact set of tissue files depends on the species/plant\u2011parts that were sampled; the naming convention is `pl` + lower\u2011case abbreviation of the tissue (generated by `abbreviate(Plant, minlength = 2)` + `PlantPart`).*</p>\n\n<p>---</p>\n\n<p>## 2. Column description (common to all tables)</p>\n\n<p>| Column | Meaning | Type |<br>\n|--------|---------|------|<br>\n| `PointID` | Unique identifier for the sampling point (e.g., `NEXT\u20112019\u2011257`). | character |<br>\n| `X` / `Y` | Projected coordinates (Easting / Northing, EPSG 3067). | numeric |<br>\n| `Plant` | Species name (full). | character |<br>\n| `PlantPart` | Plant part sampled (`Leaf`, `Bark`, `Fruit`, &hellip;). | character |<br>\n| `Tissue` | Short code: `&lt;abbr&gt; &lt;PlantPart&gt;` (e.g., `Ac Leaf`). | character |<br>\n| `Lithology_updated_Sol` | Detailed lithology description from field notes. | character |<br>\n| `Lith_simpl` | Simplified lithology (e.g., `Mafic rocks`). | character |<br>\n| `TillDepth_cm` | Soil till depth at the point (cm). | numeric |<br>\n| **Element columns** (e.g. `Al`, `As`, `Ca`, &hellip;) | Measured concentration **or** relative uncertainty, depending on the file (see below). | numeric |<br>\n| `Tissue` (re\u2011appears) | Same as above &ndash; kept for convenience. | character |</p>\n\n<p>### 2.1. Concentration vs. Uncertainty tables&nbsp;&nbsp;</p>\n\n<p>* **`Plant_all_final.csv`** &ndash; contains **concentrations** (units as reported by the laboratory, typically mg kg\u207b&sup1;).&nbsp;&nbsp;<br>\n* **`Plant_uncensored_raw.RData`** &ndash; contains the very original, untreated data.&nbsp;&nbsp;<br>\n* **`*_uncertainty*.csv`**&nbsp; &ndash; the element columns have been **replaced by their relative standard deviation (RSD)**, i.e. a unit\u2011less proportion (`0.12` = 12 % RSD).&nbsp;&nbsp;</p>\n\n<p>If you need both concentration **and** uncertainty for a given point, use the two files together (join on `PointID`).</p>\n\n<p>---</p>\n\n<p>## 3. Usage notes&nbsp;&nbsp;</p>\n\n<p>* **Joining concentration &amp; uncertainty** &ndash; the two CSVs &#39;plant&#39; and &#39;plant_uncertainty&#39; share the same column order and can be merged on `PointID`.&nbsp;&nbsp;<br>\n* **Missing values** &ndash; `NA` indicates either a non\u2011detected element or that no uncertainty parameter was available for that element.&nbsp;&nbsp;<br>\n* **Spatial reference** &ndash; coordinates are in **ETRS89 / Lantm&auml;teriet 3006 (EPSG 3067)**, suitable for Swedish national mapping.&nbsp;&nbsp;<br>\n* **Element selection** &ndash; in the subdatasets not every element is present in every tissue file; only the elements that passed the QC selection criteria are kept.&nbsp;&nbsp;</p>", 
  "@id": "https://doi.org/10.14278/rodare.4073", 
  "keywords": [
    "data", 
    "plant", 
    "Finland", 
    "geochemistry", 
    "exploration", 
    "NEXT"
  ], 
  "name": "Data publication: Plant data of the Horizon 2020 project NEXT", 
  "version": "1", 
  "@type": "Dataset", 
  "@context": "https://schema.org/", 
  "license": "https://creativecommons.org/licenses/by/4.0/legalcode", 
  "url": "https://rodare.hzdr.de/record/4073", 
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  "datePublished": "2025-11-04", 
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