Fig. 4
From: Long-term stability of soil spectral libraries with chemical and spectral insights
Spectral stability across diverse soil samples over time. 12 Representative soil order samples with spectral comparisons over time (1987 vs. 2024) for selected soil samples (A3, B3, C3, E3, EC2, H3, K3, J3 O3, P3, S3, W1).
