1. Agrochemical Methods of Soil Studies (Nauka, Moscow, 1975) [in Russian].
2. A. F. Vadyunina and Z. A. Korchagina, Methods for Studying Soil Physical Properties (Agropromizdat, Moscow, 1986) [in Russian].
3. I. M. Gabbasova, R. R. Suleimanov, R. N. Sitdikov, and T. T. Garipov, “Pyrogenic degradation of drained peat soils,” Eurasian Soil Sci. 38, 642–647 (2005).
4. Parameters of the humus status of soils;L. A. Grishina,1978
5. A. A. Dymov, Yu. A. Dubrovsky, and D. N. Gabov, “Pyrogenic changes in iron-illuvial podzols in the middle taiga of the Komi Republic,” Eurasian Soil Sci. 47, 47–56 (2014).
https://doi.org/10.1134/S1064229314020045