Data for: Soil Quality Assessment in Tropical Acid Sulfate Tidal Swamplands Using PCA-Based Minimum Data Set and UAV Multispectral Imagery for Site-Specific Rice Management"

This dataset contains soil chemical property data collected from eight composite sampling points (n = 8) across four representative tidal swampland sites in Barito Kuala Regency, South Kalimantan, Indonesia (3°11'–3°25' S; 114°35'–114°51' E). Data were collected in December 2024 under contrasting wet land and dry land conditions at four villages: Cahaya Baru, Jejangkit Muara, Jejangkit Sempurna, and Jejangkit Timur.
Soil samples were collected from the surface horizon (0–20 cm depth) using a Belgian auger. The following soil chemical parameters were measured in the laboratory: Soil Organic Carbon (SOC, %), Total Nitrogen (N-total, %), Total Phosphorus (P₂O₅, %), Total Potassium (K₂O, %), Total Iron (Fe-total, %), Calcium (Ca, %), Magnesium (Mg, %), Pyrite content (FeS₂, %), Soluble Iron (Fe-sol, ppm), Available Phosphorus (P₂O₅-avail, ppm), Soluble Sulfate (SO₄-sol, ppm), Soil pH in water (pH H₂O, 1:5), and Soil pH in KCl solution (pH KCl, 1N 1:5). The C/N ratio was derived from SOC and N-total values.
This dataset comprises four components: (1) Laboratory analysis results of 13 soil chemical indicators measured from eight sampling points under wet and dry land conditions, including raw values used to construct the Soil Quality Index (SQI); (2) Principal Component Analysis (PCA) computation data, including factor loadings, eigenvalues, percentage of variance explained, Minimum Data Set (MDS) selection criteria, indicator weights (Wi), scoring results, and final SQI values per sampling point; (3) GPS coordinate data for all eight soil sampling points, including site name, land condition, soil classification, overflow typology, and geographic coordinates (latitude, longitude, and elevation); and (4) UAV-derived multispectral imagery in GeoTIFF format (.tif), consisting of orthorectified reflectance mosaics for four spectral bands (Green 560 nm, Red 650 nm, Red Edge 730 nm, Near Infrared 860 nm) acquired using the DJI Mavic 3 Multispectral (DJI Mavic 3M) UAV at each of the four study sites, along with extracted spectral index values (NDVI, NDRE, GNDVI, LCI, and OSAVI) at each sampling point.
This dataset is associated with the manuscript: "Soil Quality Assessment in Tropical Acid Sulfate Tidal Swamplands Using PCA-Based Minimum Data Set and UAV Multispectral Imagery for Site-Specific Rice Management," submitted to Catena (Elsevier).