Soil spectral databases

Abstract

Two directions of soil research digitalization were identified and discussed. The first one is the creation and maintenance of databases with the reflectance spectra in the region of 300—2500 nm for the upper soil horizons coupled with their main physico)chemical properties. The second one is the accumulation and updating of already published spectra in the visible range (400—750 nm), with the inclusion of data on all horizons of the soil profile, allowing to perform horizons diagnostics, as well as the whole profile identification. The second direction commonly uses the soil color indicators, both in international optical systems and in Russian specific indicator systems. The algorithms can be used to study openaccess global soil libraries.