Fig. 7
From: Long-term stability of soil spectral libraries with chemical and spectral insights
Spectral feature importance for prediction analysis.. Plots for SOM (%) (left) and CaCO3 general (%) (right), showing the contribution of wavelengths (x-axis) to predictions (y-axis). Solid lines represent 2024 data; dashed orange lines represent 1987 data. Peaks indicate key wavelengths for predictions
