Fig. 2
From: Long-term stability of soil spectral libraries with chemical and spectral insights
Histograms of Soil Organic Matter (SOM) and Calcium Carbonate (CaCO3) Percentages. Histograms showing the distribution of SOM and CaCO3 percentages for the datasets from 1987 and 2024. The figure highlights the consistency in the chemical ranges of the two datasets over a 37-year storage period.
