The AFSIS project aimed to establish an Africa Soil Information system. Data was collected in sentinel sites across sub-Saharan Africa using the Land Degradation Surveillance framework and included al
Soil surface (0–15 cm) properties [total N and C, C/N ratio, concentrations of Nin – extractable inorganic N, NO3− – nitrate, and NH4+ – ammonium, OM – organic matter, and pH (H2O)], in the first (May