TY CONF TI THE HISTORY OF THE STUDY OF MINERAL SPRINGS AND SOILS OF THE REPUBLIC OF TUVA KW mineral springs KW chemical composition of water KW soil KW the Republic of Tuva JO «PROBLEMS OF SOIL FERTILITY IN MODERN AGRICULTURE» AU Sanchay-ool, B.V. AU Lopatovskaya, O.G. PY 2024 PB Krasnoyarsk Scientific Research Institute of Agriculture is a separate division of the Federal Research Center KSC SB RAS