Phys.org   August 31, 2023 Researchers in Australia used a digital soil mapping framework to combine data from recent geochemical surveys and environmental covariates that affect soil formation to predict and map aqua-regia-extractable Li content across the 7.6×106 km2 area of Australia. Catchment outlet sediment samples were collected with both top (0–10 cm depth) and bottom (on average ∼60–80 cm depth). They developed 50 bootstrap models using a cubist regression tree algorithm for each depth. The spatial prediction models were validated on an independent Northern Australia Geochemical Survey dataset, showing a good prediction for the top depth. The model for the bottom depth is […]