scholarly journals Structural and aggregate composition features of southern variant natural forest edaphotopes of Ukrainian steppe zone

2020 ◽  
Vol 31 (1) ◽  
pp. 16-22
Author(s):  
V. A. Gorban ◽  
K. S. Kuptsova ◽  
N. S. Ostrianyn ◽  
O. G. Tetiukha
Keyword(s):  
Forest Soil ◽  
Sharp Decrease ◽  
Steppe Zone ◽  
Illuvial Horizon ◽  
Natural Forests ◽  
Fraction Size ◽  
National University ◽  
Porous Part ◽  
Aggregate Composition ◽  
Intermediate Value

The natural forests of the southern variant of the steppe zone of Ukraine (according to the classification of O. L. Belgard) are located on the territory of the former porous part of the Dnieper. The properties of edaphotopes of these forests were studied in detail by the staff of the Comprehensive expedition of the Oles Honchar Dnipro National University for the study of forests in the steppe zone of Ukraine (A. P. Travleev, N. A. Bilova, A. A. Dubina, K. M. Bozhko). However, there are no data on the structural and aggregate composition of the genetic horizons of edaphotopes of natural forests of the southern variant of the steppe zone of Ukraine, established by classical methods of determination. This work is devoted to the coverage of these features. As a result of research it is established that the best conditions for the formation of structural aggregates are characteristic of the upper horizons of all studied soils and especially for the forest chernozem in the conditions of northern exposure. The highest content of agronomically valuable structural aggregates is characterized by forest chernozem in the conditions of northern exposure of the ravine, the lowest – meadow-forest soil of thalweg, and forest chernozem in the conditions of southern exposure occupies an intermediate value. The eluvial horizons of ravine edaphotopes differ most contrastingly from the illuvial horizons in the conditions of northern and southern exposures. Eluvial horizons are characterized by a reduced fraction content of > 10 mm and increased values ​​of the structural coefficient compared to illuvial horizons. In the thalweg, these differences are not so clear. The upper horizons have an increased content of water-resistant fraction size > 5 mm compared to the horizons below. With depth in all studied edaphotopes there is an increase in the content of the fraction size < 0.25 mm with depth. Among the upper horizons, the highest content of water-resistant fraction size > 5 mm and the lowest content of fraction < 0.25 mm differs meadow-forest soil in thalweg conditions. Very close to the meadow-forest soil in terms of the values ​​of the respective fractions is forest chernozem in the conditions of northern exposure. Forest chernozem in the conditions of southern exposure differs by the lowest content of water-resistant fraction size > 5 mm and the highest content of fraction size < 0.25 mm among all studied soils. Eluvial horizons of forest chernozems of northern and southern exposures differ from illuvial horizons by reduced content of water-resistant fractions of > 5 and 5–3 mm. The eluvial horizons of the meadow-forest soil of the thalweg differ from the illuvial horizon by a sharp decrease in the content of the water-resistant fraction of 1–0.5 mm. A comparative analysis of the structural and aggregate composition of the studied edaphotopes revealed that the best conditions for the formation of agronomically valuable fractions are characteristic of the forest chernozem of the northern exposure. As a result of comparing the characteristics of eluvial and illuvial horizons, it was found that the change of eluvial process to illuvial is accompanied by a sharp decrease in forest chernozems content of agronomically valuable fractions during dry sieving, as well as an increase in water resistance. In meadow-forest soils, this transition is characterized by a sharp decrease in the content of agronomically valuable fractions in the illuvial horizon during wet sieving compared to the eluvial horizon.

scholarly journals Electrophysical characteristics and dielectric constant of soils of northern natural forests of Ukrainian steppe zone

2019 ◽  
Vol 19 (2) ◽  
pp. 45-50
Author(s):  
V. A. Gorban
Keyword(s):  
Electrical Conductivity ◽  
Dielectric Constant ◽  
Electrical Resistance ◽  
Steppe Zone ◽  
Water Soluble ◽  
Natural Forests ◽  
The One ◽  
Aggregate Composition ◽  
Short Time ◽  
To Receive

Currently in soil science the search for new methods and technologies for soil research is relevant, which in a short time allows to receive a large amount of information about its condition with the lowest financial cost. Methods for determining electrophysical parameters and dielectric constant of soils are conforming to these requirements. As a result of the investigations, it was found that the upper horizons of the soils of Glubokiy ravine, located in the Ukrainian steppe zone (Novomoskovsk district, Dnipropetrovsk region, Ukraine), differ to lower values of electrical resistance and dielectric constant compared to the lower horizons. The upper horizons are characterized by increased values of electrical conductivity, mineralization and salinity compared with the lower horizons. Sudden changes in the values of all investigated parameters at the boundary of the eluvial and illuvial horizons were found in Luvic phaeozem of northern exposition of ravine and in Luvic gleyic phaeozem of thalweg. In the Luvic phaeozem of the forest northern exposure of the ravine and in the Luvic gleyic phaeozem of the leveled area of the ravine, sharp changes were found in the values of all the investigated parameters at the boundary of the eluvial and illuvial horizons. In the eluvial horizons of Luvic phaeozem, which bordering on the illuvial horizons, a sharp increase in the dielectric constant is observed. The upper horizons of Calcic chernozem of the northern ravine exposition are characterized by increased values of electrical resistance, electrical conductivity and dielectric constant, as well as lower values of mineralization and salinity compared to the upper horizons of Calcic chernozem of the southern ravine exposition. The upper horizons of the Luvic phaeozem of the forest north exposition of the ravine are characterized by higher values of electrical resistance and dielectric constant compared to the upper horizons of the Luvic phaeozem of the forest south exposition of the ravine. In terms of electrical conductivity, mineralization and salinity, Luvic phaeozems practically don’t differ. The upper horizons of Luvic phaeozems are characterized by lower values of electrical resistance and dielectric constant, as well as higher values of electrical conductivity, mineralization and salinity compared to Calcic chernozems. The results obtained indicate that the highest content of organic matter and water-soluble compounds, as well as the best structurally-aggregate composition, and also the best structural-aggregate composition is characteristic of forest chernozem. This is due to the one that formed on the southern exposition of the ravine and which is characterized by the lowest values of dielectric constant and electrical resistance, as well as the highest values of electrical conductivity, mineralization and salinity.

scholarly journals Diagnostic role of soil physical properties of forest biogeocoenoses of the Ukrainian steppe zone

2018 ◽  
Vol 29 (2) ◽  
Author(s):  
V. A. Gorban
Keyword(s):  
Physical Properties ◽  
Soil Properties ◽  
Granulometric Composition ◽  
Steppe Zone ◽  
Diagnostic Value ◽  
Soil Physical Properties ◽  
Soil Science ◽  
Pedotransfer Functions ◽  
Diagnostic Feature ◽  
Aggregate Composition

For the current stage of the development of soil science it is relevant to search for objectively existing interactions between the various soil properties. Solving this issue most appropriately should be based on the establishment of pedotransfer functions. Pedotransfer functions appeared at the time of the birth of quantitative soil science, when one of the properties of the soil tried to predict others when it became clear that everything in the soil is interrelated when it was established that there is a well-defined number of fundamental, basic properties of the soil, which is basically defines its other properties. Accordingly, the purpose of our work is to establish the diagnostic value of the individual soil physical properties of forest biogeocoenoses of the steppe by means of determining the existing interconnections between them and other properties and characteristics of these soils. The solution of this issue is one of the tasks of developing research on the soil physical properties of forest biogeocoenoses of the Ukrainian steppe zone. The diagnostic value of granulometric and structural-aggregate composition, density and permeability for determining the general state of soils due to the existence of certain interactions between the indicated parameters and other soil properties is considered. The granulometric composition is a fundamental soil characteristic that determines not only the physical state, but also all the main soil properties and regimes of forest biogeocoenoses of the Ukrainian steppe zone. The structural and aggregate composition is an important complex diagnostic feature of chernozem, which helps to reveal the peculiarities of their genesis under the influence of forest vegetation, in particular as a result of changes in the content and composition of organic matter, exchange cations, the influence of root vegetation systems, etc. The soil density, due to existing interactions with other soil properties, is an important diagnostic feature that reflects the features of their genesis and regimes, which determines the specificity of the ecological functions of the soils of forest biogeocoenoses of the Ukrainian steppe zone. Water permeability can be considered as a complex characteristic of soils, which to a certain extent reflects their granulometric composition, porosity, structural and aggregate composition, determines the features of the water-air regime. The differences of physical properties of zonal chernozems and chernozems, the genesis of which are connected with artificial and natural forest biogeocoenoses within the steppe zone of Ukraine, are analyzed. The relevance of the further search for relationships between physical indicators that are easily and promptly analyzed, and other soil properties for expanding diagnostic possibilities with respect to their genesis is pointed out.

scholarly journals Biological fundamentals of hardneck garlic productivity of different reproductions

2021 ◽  
Vol 1 (98) ◽  
pp. 126-141
Author(s):  
V. V. Yatsenko ◽  
Keyword(s):  
Raw Materials ◽  
Selection Process ◽  
Physiological State ◽  
Sharp Decrease ◽  
Research Field ◽  
Planting Material ◽  
National University ◽  
Efficiency Of Selection ◽  
General Studies ◽  
The Impact

Providing the population with food, agriculture with planting material, and raw materials for the processing and canning industries is an urgent problem of garlic production. Currently, not studied yet the passage and changes in the production processes of garlic plants under the influence of reproduction, which in some way constrains the industrial production of planting material and marketable products in general. Studies on the impact of reproductions on changes in physiological state, plant resistance to disease and productivity were conducted during 2017–2020 in the research field of the Department of Vegetable Growing, Uman National University of Horticulture. During the biometric measurements, a significant change in the variation of approbation traits (height of the plant and scape, number of leaves and its size, number and weight of bulbils, cloves in the bulb) of garlic plants under the influence of reproduction, ie variety testing must indicate what is this generation. There was a significant decrease in the concentration of chlorophyll and the antioxidant enzymes activity in the leaves in III–V reproductions, which significantly affected the productivity and tolerance of plants. Indicators of plant damage disease on a natural infectious background indicated a sharp decrease in the resistance of plants of the Sofiivskyi cultivar in IV–V reproductions, Prometei and Lyubasha cultivarss in III–V. It was found that in the cultivar Sofiivskyi the largest mass of the bulb was formed in the first reproduction, while in the cultivars Prometheus and Lyubasha – in the second, and its gradual decrease to 21.2 % in the fifth reproduction. Yield had a similar trend, where the maximum reduction in yield was observed at 18.2; 28.0 and 17.0 % in the cultivars Sofiivskyi, Prometei and Lyubasha. The developed scientifically substantiated provisions will allow to increase efficiency of selection process and production of seed material.

scholarly journals Forest and Plantation Soil Microbiomes Differ in Their Capacity to Suppress Feedback Between Geosmithia morbida and Rhizosphere Pathogens of J. nigra Seedlings

2021 ◽  
Author(s):  
Geoffrey M Williams ◽  
Matthew Ginzel
Keyword(s):  
Forest Soil ◽  
Natural Forest ◽  
Microbial Interactions ◽  
Necrotic Area ◽  
Natural Forests ◽  
Opportunistic Pathogens ◽  
Fungal Community Composition ◽  
Treated Soil ◽  
Geosmithia Morbida ◽  
One Year

Thousand cankers disease (TCD) is hypothesized to have a greater impact on eastern black walnut (Juglans nigra) in urban forests and plantations compared to natural forest stands. Along with other factors, such as resource availability, the phytobiome could partly account for observed differences in disease severity across management regimes. We investigated the extent to which J. nigra-associated soil microbiomes from plantations and natural forests modulate a) the amount of necrosis caused by Geosmithia morbida Kolařík, Freeland, Utley and Tisserat in one-year-old seedlings, and b) relative abundance of rhizosphere endophytes and opportunistic pathogens Fusarium and Rhizoctonia in response to aboveground inoculation with G. morbida. Our results suggest that the microbiome from natural forest soil in central Indiana suppresses Fusarium and is indirectly suppressive of G. morbida. Natural forest soil had a greater ability to reduce the size of necrotic area caused by G. morbida compared to steam-treated soil. Inoculating stems of seedlings with G. morbida induced a shift in fungal community composition in the rhizosphere, including Fusarium and Rhizoctonia, but the direction and magnitude of the shift depended on whether seedlings were amended with forest, plantation, or steam-treated soil. In a companion experiment, necrotic area in G. morbida-inoculated seedlings was twice as high in seedlings grown from seeds that were treated with Fusarium solani relative to those grown from seeds treated with water. Our findings support the hypothesis that TCD severity can be modulated by host-mediated feedback between above- and belowground pathogens, as well as by microbial interactions in the rhizosphere.

THE INFLUENCE OF NO-TILL MANAGEMENT SYSTEM ON AGROPHYSICAL PROPERTIES OF AGROCHERNOZEMS IN THE TRANS-URAL STEPPE ZONE OF RISKY AGRICULTURE (REPUBLIC OF BASHKORTOSTAN)

2020 ◽  
Author(s):  
Ruslan Suleymanov ◽  
◽  
S. Zaykin ◽  
Keyword(s):  
Management System ◽  
Water Resistance ◽  
Soil Cover ◽  
Steppe Zone ◽  
No Till ◽  
Republic Of Bashkortostan ◽  
Agricultural Use ◽  
The Republic ◽  
Aggregate Composition ◽  
High Level

The article presents the results of the evaluation agrophysical properties of agrochernozems under influence of No-Till management system. The research was conducted in the Trans-Ural Plain-Steppe Zone of the Republic of Bashkortostan (Russia). The territory is located in the zone of risky agriculture and is arid. The territory characterized by a high level of agricultural use. Various degradation processes are observed in the soil cover. Such parameters as bulk density, soil-hydrological constants, structural-aggregate composition and water resistance of aggregates are studied.

scholarly journals Trophic selectivity of litter saprophages (Diplopoda, Isopoda) in natural forests in the steppe conditions

2019 ◽  
Vol 30 (1) ◽  
pp. 24-28
Author(s):  
A. P. Pokhylenko ◽  
O. O. Didur ◽  
Yu. L. Kulbachko ◽  
Yu. Yu. Ovchynnykova
Keyword(s):  
Regression Model ◽  
Leaf Litter ◽  
Tree Species ◽  
Steppe Zone ◽  
Soil Invertebrate ◽  
Natural Forests ◽  
Linear Quadratic ◽  
Porcellio Scaber ◽  
Trophic Activity ◽  
Trophic Preferences

The forest litter serves as a bridge between the above ground forest flora and fauna with the soil. Trophic activity of soil invertebrates affects the decomposition processes of plant organic residues and, thus, on the forest soils fertility. It is a natural mechanism that positively influences on maintenance and improvement of natural soils properties. The object of this study is the representatives of Diplopoda Rossiulus kessleri (Lohmander, 1927) and Isopoda Porcellio scaber (Latreille, 1804). The aim of the paper is to qualify the trophic preferences of the saprophages, as soil invertebrate representatives, of natural forest ecosystems in conditions of the steppe zone of Ukraine. To identify the ecological role of millipedes and woodlice as primary destructors of leaf litter, we made a field experiment studying their trophic preferences with the use of microcosms. Microcosms (containers) were filled with soil free from invertebrates; after it added a certain mixture of leaf litter and saprophages representatives. To analyze the decomposition rate of leaf litter the percentage of consumed litter was determined by calculating air-dry mass of leaf litter in the beginning and at the end of experiment. A regression model that reflects the trophic selectivity of saprophages for the following mixture components of such tree species as the common maple (Acer campestre (L.), little-leaved linden (Tilia cordata (Mill.), common oak (Quercus robur (L.), European white elm (Ulmus laevis (Pall.), European ash (Fraxinus excelsior (L.) is proposed. Among other regression model types (linear, quadratic, special cubic), permissible statistical estimates revealed a special cubic mathematical model and it allowed to conclude on the saprophages trophic selectivity. The special cubic regression model has a relatively high performance (the determination coefficient is 87.5 %) and adequately approximates empirical data with a significance level of less than 0.05. It was found out that common maple and European white elm litter is consumed in a greater quantity than any other litter from suggested. It is confirmed by their main effects coefficients in the regression equation. Thus, the saprophages trophic selectivity  persistence in natural forests under the conditions of the steppe zone has been proved. Consequently, the saprophages trophic activity increases with the presence of the maple and European white elm in natural forests, which makes expedient the use of these tree species, in the design of forest stands.

scholarly journals Hydrological and hydrobotanic typology of the lake of North-Steppe Dnieper region

2019 ◽  
Vol 30 (2) ◽  
pp. 125-131
Author(s):  
N. O. Roshchyna ◽  
B. O. Baranovski
Keyword(s):  
Coniferous Forest ◽  
Steppe Zone ◽  
Large River ◽  
Floodplain Lakes ◽  
Floodplain Lake ◽  
Lake District ◽  
Anthropogenic Transformation ◽  
The Third ◽  
The North ◽  
National University

This article is devoted to the typology of lakes of the North-Steppe Dnieper. In developing the typology of lakes, the parameters were taken into account: landscape location, hydro-chemical and hydro-biological characteristics and the degree of their anthropogenic transformation. The data presented are based on the processing of stationary and route research materials from 1998 to 2018 on the lakes of river valleys: Dnieper, Samara, and Orel. Hydrological indicators are analyzed according to the literature, cartographic and archival data of the Dneprodiprovodkhoz Institute and the Biology Research Institute of Oles Honchar Dnipropetrovsk National University. Floristic studies were carried out using general botanical methods of collection and herbarization, and in the study of typical aquatic flora - special hydro-botanical methods. Geo-botanical studies were carried out according to geo-botanical and special hydro-botanical methods. The article presents the hydrological and hydro-botanical features of the lakes of the valley of a large river (Dnieper) and medium rivers (Samara, Orel). Lakes are located exclusively in valley-terrace landscapes in the northern part of the steppe zone of Ukraine. Despite this, based on cartographic materials, we proposed zoning of the territory of the lakes of the North-Steppe Dnieper according to the criteria: their location in lake regions, in various landscapes and the degree of anthropogenic transformation. The following districts and subareas were identified: Dnieper Lake District (Dnieper floodplain lake subarea with slight flooding of the floodplain, Dnieper Lake subarea of floodplain terraces, Dievsky floodplain lake subarea); Samara Lake District (Lake Subarea of Samara Coniferous forest, Lake Subarea of Estuary part of Samara); Orel Lake District. Lakes are located in various physical and geographical conditions of the floodplain, arena and third saline terrace. The typology of the lakes of the North-Steppe Dnieper basin was developed on the basis of regionalization of the location of the lakes, distribution according to the ecological and topographic profile, hydrological, hydro-chemical regimes, degree and nature of overgrowing. 11 types of lakes are identified based on the above criteria. 6 types were identified for the valley of a large river: floodplain lakes (3 types) with a long-flow regime, lakes of the second (sandy) terrace (2 types) and highly mineralized lakes of the third (saline) terrace. 5 types were identified for the valleys of middle rivers: floodplain lakes (3 types) with an episodic short-burial regime, lakes of the second (sandy) terrace (low-mineralized) and excessively mineralized lakes of the third (saline) terrace.

scholarly journals Introduction success of less common species from the genus Berberis L.

2019 ◽  
Vol 9 (4) ◽  
pp. 634-640
Author(s):  
Y. V. Lykholat ◽  
N. O. Khromykh ◽  
T. I. Lykholat ◽  
O. M. Bobrova ◽  
O. O. Didur ◽  
...  
Keyword(s):  
Large Scale ◽  
Raw Materials ◽  
Steppe Zone ◽  
Botanical Garden ◽  
Common Species ◽  
Climatic Conditions ◽  
Reproductive Ability ◽  
Introduced Plants ◽  
Significant Difference ◽  
National University

The study dealt with the patterns of adaptation of the genus Berberis L. low-abundant alien plants to the climatic conditions of the steppe zone of Ukraine. The success of the introduction, which was conducted on the territory of the Botanical Garden of Oles Honchar Dnipro National University (city of Dnipro) near 60 years ago, was evaluated by a set of indicators. According to the study of phenological rhythms, introduced plants can be characterized as plants with a relatively short growing season, a relatively long shoot growth, a short flowering period and a long maturing period. This indicates the lability of the phenological rhythms of the introduced plants, which respond to changes in environmental conditions in terms of the beginning and end of the phenological phases. The aquatic regime of introduced plants reflects the level of their adaptation to the environment due to the ability of plant organism to withstand water consumption. The study of water exchange features of Berberis L. plants revealed a moderate decrease in the intensity of transpiration and a moderate water deficit in the plant leaves, which indicates the adaptation of the species to the difficult climatic conditions of the steppe zone. The response of introduced plants to the level of moisture in the steppe region confirmed the universal mechanism of plant adaptation to arid conditions. Comparative analysis of the reproductive ability of introduced plants of the genus Berberis L. in the conditions of the Botanical Garden revealed a significant variability of quantitative indicators. The weight of 100 fruits ranged from 12.5 g (B. vulgaris) to 16.3 g (B. declinata). Seed length varied from 4.5 mm (B. canadensis) to 5.2 mm (B. declinata, B. amurensis), seed width varied from 1.8 mm (B. amurensis, B. vulgaris) to 2.1 mm (B. koreana). The highest mass of 1000 seeds was observed in the species B. koreana. To compare sample averages, the criterion for the significant difference of Tukey's group averages was used. The investigated plants of the genus Berberis L. can be recommended for the introduction into large-scale and individual gardening in order to expand the range of fruit products and obtain biologically valuable raw materials for the industrial production of functional products.

scholarly journals Influence of anthropogenic factors on the fauna of diplopods in the steppe zone of Ukraine

2021 ◽  
Vol 32 (1) ◽  
pp. 51-60
Author(s):  
V. M. Kozak
Keyword(s):  
Heavy Metals ◽  
Body Weight ◽  
Steppe Zone ◽  
The Body ◽  
Anthropogenic Factors ◽  
Natural Forests ◽  
Feeding Rates ◽  
Pirimiphos Methyl ◽  
High Concentrations ◽  
Taxonomic Groups

Various industries that constantly pollute the environment with their waste are quite well developed in the steppe zone of Ukraine. That in turn affects living organisms. The analysis of literature sources allowed to determine the factors influencing the diplopods fauna of the Steppe. Parasites, herbicides, fungicides, insecticides, heavy metals and other pollutants adversely affect invertebrates. Pesticides (glyphosate, imidacloprid, dimethoate, pirimiphos-methyl, propargite, cypermethrin, tebuconazole, chlorpyrifos, mefenoxam, mancozeb, sulfur, propiconazole, cyprodinil) are toxic to diplopods. They can affect lifetime, fertility, abundance, coordination of movements, feeding rates, change body weight and even in high concentrations cause the death of these animals. Sulfur, pirimiphos-methyl, propiconazole, imidacloprid, dimethoate and cypermethrin are the most toxic of all these pesticides. They cause the highest mortality. Heavy metals accumulate in the bodies of saprophages, reduce their abundance, affect body weight, cause a change in the intensity of eating food by diplopods. Nickel, lead, cadmium, zinc, cuprum and ferrum are toxic to millipedes. High concentrations of cadmium cause 100% mortality of Megaphyllum kievense (Lohmander, 1928). The development of urbanization causes a decrease in the abundance of saprophages. The species composition and number of individuals of some taxonomic groups of millipedes are reduced in reclamation areas. The nematodes Steinernema carpocapsae (Weiser, 1955) and Heterorhabditis heliothidis (Khan, Brooks & Hirschmann, 1976) slow down the protective reactions of the body of Oxidus gracilis (C. L. Koch, 1847). The high intensity of diplopod infection with gregarines slows down the feeding process of Rossiulus kessleri (Lohmander, 1927). Lighting, soil humidity and the number of ants also affect the abundance of diplopods in natural forests and forest plantations of the steppe zone. Thus the diplopods are influenced by many environmental factors that can reduce their abundance in agrocenoses, forested and reclamation areas of the steppe zone of Ukraine.

scholarly journals Influence of forest vegetation on color, reflectivity and humus content in soils of northern variant ravines of the steppe zone of Ukraine

2021 ◽  
Vol 32 (1) ◽  
pp. 28-34
Author(s):  
V. A. Gorban ◽  
M. S. Yakuba ◽  
A. O. Huslystyi
Keyword(s):  
Gradual Increase ◽  
Humus Content ◽  
Steppe Zone ◽  
Soil Samples ◽  
Forest Vegetation ◽  
Natural Forests ◽  
Genetic Horizon ◽  
Brightness Coefficient ◽  
The Village

Unique natural forests grow in the conditions of ravines of the steppe zone of Ukraine. Soil scientists have been researching the soils of ravines for more than 60 years. Despite long-term research, aspects of the genesis of specific ravine soils, which are reflected in their optical properties, are still virtually unexplored. Based on this, the aim of our work is to establish the characteristics of the influence of forest vegetation on color and reflectivity, as well as the closely related content of humus in the soils of the northern variant ravines of the steppe zone of Ukraine. Soil samples were taken from each genetic horizon of sections laid in the Glybokyy ravine (near the village of Andriivka, Novomoskovsk district, Dnipropetrovsk region). Soil color indices were determined by scanning soil samples followed by image analysis. The reflectivity of soils was investigated using a monochromator. The humus content in soils was determined by the standard method of wet oxidation of organic matter according to I. V. Tyurin. As a result of the performed researches it is established that the upper horizons of the soils of the Glybokyy ravine differ in the reduced values ​​of the indicators of the HSB, RGB and Lab systems, with depth their values ​​increase. The upper horizons of the ravine soils are characterized by reduced values ​​of brightness coefficients at wavelengths of 480, 650 and 750 nm, as well as the integrated brightness coefficient, with depth there is a gradual increase in their values. The color indicators of the RGB and Lab systems are the most successful for diagnosing and predicting the humus content in the soils of the ravine. Forest chernozems and forest-meadow soil of the ravine, which were formed under natural forest vegetation, are characterized by reduced values ​​of color indicators of HSB, RGB and Lab systems, reduced values ​​of brightness coefficients and increased humus content compared to chernozems, the genesis of which is related.

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