NAJIMOVA IRODA; TASHKENBAYEV OTABEK. COMPARATIVE ANALYSIS OF METHODS FOR DETERMINING HUMUS FRACTIONS IN THE COMPOSITION OF GRAY SOILS (I.V.TYURIN AND V.N.SMAKOV). Journal of Academic Research and Trends in Educational Sciences, [S. l.], v. 2, n. 2, p. 59–63, 2023. Disponível em: http://ijournal.uz/index.php/jartes/article/view/518. Acesso em: 7 may. 2024.