Research Institute for Nature and Forest (INBO)
Published March 31, 2025 | Version EJP Soil FL soil data v1
Dataset Open

EJP Soil double sampling study (Task 6.3): physicochemical soil data of 166 Belgian LUCAS 2022 sampling points

Authors/Creators

  • 1. Research Institute for Nature and Forest

Contributors

  • 1. ROR icon Research Institute for Nature and Forest
  • 2. ROR icon Ghent University

Description

EJP Soil Double Sampling Study:  physicochemical data Flanders (Belgium)

During the elaboration of EJP Soil deliverable 6.3 of Work Package 6, entitled ‘Proposal of methodological development for the LUCAS programme in accordance with national monitoring programmes’ (Bispo et al., 2021), a large majority of partners (23) suggested to launch a double sampling study by collecting national soil samples on LUCAS points to compare LUCAS and National design strategies and sampling and analytical protocols.

For Flanders region, we conducted a double-double sampling study on 166 LUCAS points that were selected as representative for cropland, grassland and woodland soils. 

Each of these LUCAS points were sampled according to the LUCAS sampling scheme and the national (Cmon) scheme by our national surveyors (double sampling type 1) , and sampled by LUCAS surveyors (COBA group) for analysis by the LUCAS central lab so that also the laboratory results could be compared for the LUCAS 2022 campaign (double sampling type 2).    

The LUCAS 2022 campaign selected also for Belgium 11 LUCAS Biopoints: 5 in Flanders, 1 in Brussels region and 5 in Wallonia. At the EJP National HUB we agreed to sample all 11 Belgian biopoints both for physico-chemical soil properties (this study) as for soil biodiversity assessment through eDNA metabarcoding (Lambrechts et al., 2025).

The dataset comprises 3 CSV files: (1) list of sampling points with LUCAS pointID, coordinates and metadata, (2) the physico-chemical soil data of each point according to the LUCAS and Cmon sampling scheme, (3) the soil bulk density data according to the Cmon sampling scheme.

Samples were collected between 15 June 2022 and 23 May 2023.

Variables and units

Variable Description Unit Method
Thickness Layer thickness cm  
Depth Depth of layer (negative for forest floor) cm  
Sand Sand fraction by Laser Diffraction (LD) vol% ISO11277 & ISO13320
Silt Silt fraction by LD vol% ISO11277 & ISO13320
Clay Clay fraction by LD vol% ISO11277 & ISO13320
TC Total carbon g/kg ISO 10694
TIC Total inorganic carbon g/kg ISO 10694
TOC Total organic carbon (TC-TIC) g/kg ISO 10694
TN Total nitrogen g/kg ISO 13878
pH_KCl_v_v pH KCl 1:5 v/v - ISO 10390
EC_m_v Electric conductivity m/v µS/cm ISO 11265
EC_v_v Electric conductivity v/v µS/cm ISO 11265
pH_H20_m_v pH H2O 1:5 m/v - ISO 10390
pH_H20_v_v pH H2O 1:5 v/v - ISO 10390
pH_KCl_v_v pH KCl 1:5 v/v - ISO 10390
pH_CaCl2_m_v pH CaCl2 1:5 m/v - ISO 10390
pH_CaCl2_v_v pH CaCl2 1:5 v/v - ISO 10390
BD_mean Bulk density mean of 4 rep g/cm³ ISO 11272
BD_sd Bulk density stdev of 4 rep g/cm³  
BD_CV Bulk density CV of 4 rep g/cm³  
SWC_volp_mean Volumetric moisture content mean of 4 rep vol%  
SWC_volp_sd Volumetric moisture content sd of 4 rep vol%  

 

The data are evaluated in the report: De Vos, B. & Lambrechts, S. 2025. Comparing LUCAS and Cmon sampling schemes and survey data on 166 LUCAS 2022 points in Flanders, Belgium. EJP Soil Deliverable 6.3. Horizon 2020 EJP Soil grant agreement 862695. (to be published on Zenodo after Embargo period of 6 months).

 

Files

EJPsoil_LUCAS22_Double_sampling_BE_Flanders_Sampling_Points_list.csv

Files (103.1 kB)

Additional details

Related works

Is referenced by
Publication: 10.5281/zenodo.15046019 (DOI)
Is supplemented by
Dataset: 10.5281/zenodo.14845589 (DOI)

Funding

European Commission
EJP SOIL - Towards climate-smart sustainable management of agricultural soils 862695

Dates

Collected
2023-05-23
All samples taken to lab for analysis