TƏBİƏT VƏ ELM Beynəlxalq elmi jurnal. İmpakt Faktor: 2.101. 2023 / Cild: 5 Sayı: 3 / 7-12 ISSN: 2707-1146 NATURE AND SCIENCE International scientific journal. Impact Factor: 2.101. 2023 / Volume: 5 Issue: 3 / 7-12 e-ISSN: 2709-4189 7 BİOLOGİYA ELMLƏRİ VƏ AQRAR ELMLƏR BIOLOGICAL SCIENCES AND AGRARIAN SCIENCES DOI: https://doi.org/10.36719/2707-1146/30/7-12 Turkan Hasanova Ministry of Science and Education of the Republic of Azerbaijan Institute of Soil Science and Agrochemistry Ph.D in Agricultural Sciences turkan.amea@gmail.com Gunay Mammadova Ministry of Science and Education of the Republic of Azerbaijan Institute of Soil Science and Agrochemistry Ph.D in Agrochemical Sciences turkan.amea@gmail.com UOT 631.47 THE IMPACT OF CHANGES IN SOIL MOISTURE INDICATORS ON BIOLOGICAL ACTIVITY IN RECENT YEARS ON THE SOUTHERN SLOPE OF THE GREATER CAUCASUS Abstract The purpose of the study was to study the role of soil moisture in the seasonal change of biological activity, which is one of the main diagnostic indicators of soils in the Sheki-Zagatala region of Azerbaijan in 2020-2022. Studied the same relative change in spectral reflectance coefficients is observed with the change of soil moisture of biological activity. In the spring-summer and spring periods, the most total amount of amino acids was found: in mountain-meadow chernozems: in spring - 13.08 mg per 10 g of soil, in summer - 18.92 mg, in autumn - 11.3 mg, in winter at low temperatures and excessive soil moisture, the amount of amino acids decreases to 7.81 mg, while in brown mountain forest soils it is: in spring - 14.9 mg, in summer - 11.91 mg, in autumn - 10.89, in winter - 7.52 mg. In humidity between 2-37%, the integral reflection coefficient varies from 12 to 33% and in 1% humidity in fidelity in the upper horizon reduces the integral reflection coefficient by 0.96% Keywords: biological, activity, fertility reproduction, soil enzymes, moisture content Türkan Həsənova Azərbaycan Respublikası Elm və Təhsil Nazirliyi Torpaqşünaslıq və Aqrokimya İnstitutu aqrar elmlər üzrə fəlsəfə doktoru turkan.amea@gmail.com Günay Məmmədova Azərbaycan Respublikası Elm və Təhsil Nazirliyi Torpaqşünaslıq və Aqrokimya İnstitutu aqrokimya elmlər üzrə fəlsəfə doktoru turkan.amea@gmail.com UOT 631.47