Loess-like Loams Research Articles

Mineralogical Composition of Particle-Size Fractions of Solonetzes from the North Crimean Lowland

Data on the mineralogical composition of clay ( 10 μm) fractions of meadow solonchakous solonetzes (Calcic Gypsic Salic Stagnic Solonetz (Albic, Siltic, Columnic, Cutanic, Differentic)) developing from loesslike loam and clay in the North Crimean Lowland are presented. Fractions >5 μm constitute nearly 50% of the soil mass and are characterized by the same mineralogical composition in the entire profile; they consist of quartz, plagioclases, potassium feldspars, and micas (biotite and muscovite). The eluvial-illuvial redistribution of clay in the course of solonetzic process is accompanied by changes in the portion of mixed-layer minerals and hydromicas in the upper part of the profile; a larger part of the smectitic phase is transformed into the superdisperse state. In the eluvial SEL horizon and in the illuvial BSN horizon, the clay fraction is impoverished in smectitic phase and enriched in trioctahedral hydromicas. Upon calculation of the content of clay minerals per bulk soil mass, the distribution of mixed-layer minerals is either eluvial, or eluvial-illuvial, whereas the distribution of hydromicas has an illuvial pattern without distinct eluvial minimum in the SEL horizons. The eluvial-illuvial distribution pattern of clay minerals in solonetzes of the North Crimean Lowland is compared with the distribution pattern of clay minerals in solonetzes of the West Siberian Lowland. Coefficients characterizing differentiation of solonetzes by the contents of particular mineral components are suggested.

Ландшафтна структура природного заповідника “Медобори”

Tovtry is a complex of fossil reef Miocene buildings that creates one of the most picturesque scenery of the surrounding plains of Podillya region. Tovtry zone consists of main ridge (the late Baden barrier reef), isolated Tovtry hills (the late Baden bioherms, located east of the ridge), isolated tovtry (the early Sarmat bioherms, located west of the main ridge), the territories of the former channels, lagoons and passes between certain reef masses, the part of which is occupied with the modern rivers. These geological and geomorphological elements are the basis of the definition of Podillian Tovtry landscapes areas, and their combination is the basis of the individual landscapes. The great contribution to the study of Tovtry landscapes was made by K. Herenchuk (1949, 1979, 1980), who identified the main types of localities and individual landscapes. In addition to his distinguished achievements, the researches done by M. Chyzhov (1963), T. Kovalyshyn and I. Kaplun (1998), P. Shtoyko (2000), K. Moskalyuk (2011) and others could be mentioned. In Tovtry there are four landscapes: Mylno, Zbarazh, Medobory (Krasna) and Tovtry (Kamianets-Podilskyi). Natural Reserve “Medobory” (9 516.7 hectares) is located in the central part of Tovtry, mainly in Medobory landscape. The landscape map of nature reserve, covering the surrounding area, at a scale of 1: 25,000 has been done. Six landscaped areas and more than 70 kinds of tracts have been identified. The largest area is the area of elongated summit plains of main Tovtry ridge rocky hills, covered by beech hornbeam-oak forests on humus-carbonate soils. The territory with the buried reef formations, overlained by loess-like loams, with hornbeam-oak forests on humus-carbonate soils in combination with grey forest soils occupies large area. The area of grouped and isolated side tovtry, covered by rock and meadow-steppe vegetation, shrubs on humus-carbonate soils are fragmentary represented in the natural reserve. Outside the territory of natural reserve, there are areas of the extensive plains with chernozems. They were covered by meadow vegetation in the past and now they are the agricultural lands. Some areas of the reserve are covered by wavy interfluves of Husiatyn and Lanivtsi landscape, which are typical for stratal-tiered landscapes of Podillya. Wavy watersheds, composed of thick strata of loess loam, are mainly covered by hornbeam forests in place of oak on grey forest soils and podzolic chernozem. Along Zbruch and Gnyla the area of narrow river valleys with wide floodplains and low terraces fragments are very common. Floodplain is covered by grass-forb meadows, with alder and osier bed centres on meadow and meadow soils. The regional and local features of the landscape structure of the reserve have been defined. Enough representation of the main types of Tovtry areas, their altitude differentiation (landscape layering) and monolithic areas of Tovtry main ridge are the most important. Key words: Podillian Tovtry, main ridge, side tovtry hills, nature reserve “Medobory”, area of landscape.

Identification of carbonate pedofeatures of different ages in modern chernozems

Carbonate pedofeatures of three chernozemic soils developed from loesslike loams in the foreststeppe zone of Lipetsk oblast under fallow plot (Luvic Chernozem (Clayic, Pachic)) and under forest (Calcic Chernozem (Clayic, Pachic)) and in the steppe zone of Dnepropetrovsk oblast (Calcic Chernozem (Episiltic, Endoclayic, Pachic)) were studied in the field and laboratory with the use of a set of methods, including the radiocarbon method, mass spectrometry, and micro- and submicromorphology. The morphological diversity of carbonate pedofeatures in these soils was represented by carbonate veins, coatings, disperse carbonates (carbonate impregnations), soft masses (beloglazka), and concretions. In the forest-steppe soils, disperse carbonates and soft masses were absent. The radiocarbon age of carbonate pedofeatures in the forest-steppe soils varied within a relatively narrow range of 3–4.3 ka cal BP with a tendency for a younger age of carbonate concretions subjected to destruction (geodes). In the steppe chernozem, this range was larger, and the 14C ages of different forms of carbonate pedofeatures were different. Thus, soft masses (beloglazka) had the age of 5.5–6 ka cal BP; disperse carbonates, 17.5–18.5 ka cal BP; and hard carbonate concretions, 26–27 ka cal BP. Data on δ13C demonstrated that the isotopic composition of carbon in virtually all the “nonlabile” carbonate pedofeatures does not correspond to the isotopic composition of carbon of the modern soil organic matter. It was shown that the studied chernozemic soils are polygenetic formations containing carbonate pedofeatures of different ages: (a) recent (currently growing), (b) relict, and (c) inherited pedofeatures. The latter group represents complex pedofeatures that include ancient fragments integrated in younger pedofeatures, e.g., the Holocene soft carbonate nodules with inclusions of fragments of the ancient microcodium.

Pore-size distribution in loamy soils: A comparison between microtomographic and capillarimetric determination methods

Pore-size distribution in a soddy-podzolic silt loamy soil developing from mantle loesslike loam (Eutric Albic Retisol (Loamic, Cutanic)) was calculated from the water retention curve according to Jurin’s equation and directly determined in microtomographic experiments. Rounded macropores with the diameter of their sections from 75 to 1000 μm predominate in horizontal sections if the studied soil samples. A larger part of the soil pores (>30–35%) belongs to micro- and nanopores, and they cannot be quantitatively determined by the tomographic method, because their sizes are smaller than the detection limit of the applied X-ray microtomography (8.75 μm per pixel). This leads to a significantly larger pore volume determined from the water retention curve in comparison with the “tomographic” pore volume. A comparative analysis of pore-size distribution curves obtained by these methods shows that the major regularities of the pore-size distribution in the range from 30 to 5000 μm are similar in both cases. Fine macropores and, partly, mesopores predominate. Common characteristics of the pore-size distribution curves obtained by these methods, including the coincidence of the peaks, attest to the validity of classical approaches, according to which the hydrology of soil pore space can be perceived as a physical model of cylindrical capillaries of different sizes with capillary-sorbed water.

Spatio-temporal dynamics of the penetration resistance of recultivated soils formed after open cast mining

On the basis of studying the spatio-temporal dynamics of soil penetration resistance we proved the existence of the technozem ecomorphs as above horizon soil formations. Research was carried out at a research center for study of recultivation processes in Ordzhonikidze city. Measurement of soils penetration was made in field conditions using an Eijkelkamp penetrometer on a regular grid at depths of up to50 cmwith intervals of5 cm. Calculation of average values and degrees of variation was performed by means of descriptive statistical tools. The extent of soil penetration spatial dependence was assessed and the existence of ecomorphs was proved by means of geostatistical analysis. The degree of associativity of spatial distribution of indicators of a soil body in different years of research was established by means of correlation analysis. The level of variation in space and in time of technozem penetration generated on loess-like loams, grey-green, red-brown clays, and also pedozems was revealed. The degree of spatial dependence of technozem penetration within soil layers and also the linear sizes of ecomorphs as above horizon soil structures was established. The time dynamics of penetration of various recultozems were described. As a result of research into the spatio-temporal dynamics of penetration of technozems, data confirming the hypothesis of the existence of ecomorphs as above horizon morphological soil formations were obtained. An ecomorphic approach to the study of the morphological structure of technozems is proposed. The comparative characteristics of ecomorphs from various types of technozem are presented. The results obtained solve the problem of combining the higher and lowest levels in the hierarchical system of soil organisation as a natural body, which should raise the efficiency of the analysis of relations of morphological elements as a basis for detailed reconstruction of recultivation processes, soil formation, and study of their regimes and functions.

Soil Cover Structure under Oak Groves in the Urban District of Voronezh

The spatial organization of soil cover in a mountain oak grove of the urban district of Voronezh has been investigated. The complexity and specificity of soil cover structure caused by geological and geomorpho-logical conditions and vegetation has been shown for three key sites. It has been established that combinations of gray forest-steppe soils of different types and varieties dominate under the canopy of natural oak forests. Dark gray and gray forest-steppe soils on cover loess-like loams with favorable physicochemical and chemical properties are the best soils for the growth of oak groves of site classes I and II.

Soil and geobotanical, typological characteristics of bottomland forest with short-term flooding Poltava-city green belt

Carrying out its assignment Poltava-city green belt bottomland forests with short-term flooding, has significant anthropogenic impact, needs constant research of forest biogeocoenosis present day condition. There have been done the complex research of bottomland forests with short-term flooding which are located in the range of Poltava-city green belt. Forest types according to O. L. Belgard have been noted. Soil and geobotanical characteristics, soil sections macromorphological peculiarities have been given, results of soil water extracts analysis in the investigated forestry have been noted. Throuout the complex researches of all components of forest biogeocoenosis the learning of forest and environment coorelation that is due to anthropogenic effect is topical. Especially it concerns the big cities green belt of industrial regions that suffer from the human direct influence or indirect consequences of his living. Thereby the National special-purpose program «Forests of Ukraine» for 2010–2015 was approved the aim of which is a complex study of this category of forest-steppe zone forest biogeocoenosis. For this reason was made an accent to investigate all-round the Poltava-city green belt forests related to Poltava Region throuout the regional special-purpose program of forestry integrated development «Poltava region forests by 2015». To identify the soil and geobotanical characteristics of biogeocenosis and physical and chemical piculiarities of bottomland forests with short-term flooding adaphotop we will consider the most typical sample plots of different plantations according to its forest stand that grows in relatively identical conditions. Forest areas of Poltava-city green belt belongs to the eastern soil and climatic forest-steppe zone of Poltava Region and is situated in forest-stepp belt of Left bank of Dnipro inside the Dnipro and Donetsk dimple. The most common soils are deep, low humic chernozem and middle clay-loam soil. There are mulch and sandy, agrilloarenaceous soils in river valleys. The picture of exploration area ground structure looks in such a way. The most common ground species of the area is a loess-like clay loam. There are sands observed near the river bed of Vorskla and clay on steep slopes. Soddy-meadow and chernozem-meadow, sandy loam and clay loam soils are involved in the bottomland forests formation. Typical chernozem occupies significant territories, which is formed by herbaceous grouping of mesoxerophytes, euxerophytes and xeromesophytes. Floodplain soils are divided into three parts: riverine, central and terrace near flood plain. In the riverine part is formed the most light mechanical components of interbedding soils formed on new derived silt from slightly humic layers. There are a low percent of humus (not more than 1 %) and nutritional chemicals. Thereby their fertility is low. In the central part of floodplain had been formed the sandy loam and clay loam soils with stronger profile on the massive, often calcareous or carbonaceous parent rock material. In cases of flood the water is widely overflowed and stay for a long time rich in sludge particles. It is the richest soils of the floodplain. The done research gave us the opportunity to clear up that the bottomland forests with short-term flooding of Poltava-city green belt are consist mainly of oak, aspen and alder forests. The formation and distribution of the main associations of floodplain forests depend on the regime of floodplain, trophotop and relief inhomogenuity. It was noticed that it can be found three more typical natural forest vegetations related to bottomland forests with short-term flooding inside the Poltava-city green belt: Dc' 3 (moist linden oak forest with hairlike sedge), Dn / 4 (alder forest with muddy tall herbaceous vegetation), Dc / 2 (live aspen forest with). It was noticed, that in all investigated plant formations the forest site type is sandy loam with different variations: live (SP / 2), moist (SP / 3), muddy (SP / 4). Different variations of soil has been investigated. There is no carbonate in soils of the investigated biogeocenosis. Water extract analysis tell about the lack of salinity properties, dry particles ranges (0,05–0,2 %), pH is alkaline. Detailed soil and geobotanical characteristics and establishing peculiarities of bottomland forests with short-term flooding adaphotop will give opportunity to reconstruct the existing Poltava-city green belt plantations and organize the stationary investigations with the aim of their more rational employment and saving.

DEVELOPMENTAL CHARACTER OF NATURE IN THE MIDDLE NEOPLEISTOCENE OF UKRAINE

The landscape-climatic conditions of Ukraine in the Middle Neopleistocene (400-120 ths. y.) were characterized by the contrast changes of cold and warm epochs. These events are distinctly shown in the structure of loess-soil formation. In the territory of Ukraine for this period of time there have been established the traces of one glaciation that took place after the Chigirin (Zavadovka) interglacial. The last warm epoch at the end of the Middle Neopleistocene was marked by forming of Kaidaki (Korshevsk) paleosol and, later, by Tyasmin loess horizon. In the glacial zone they correspond to the Pripyat stadial deposits of the Dnieper glaciation and loess-like loams with two paleosols.

Landscape evolution in the periglacial zone of Eastern Europe since MIS5: Proxies from paleosols and sediments of the Cheremoshnik key site (Upper Volga, Russia)

A variety of studies of the re-examined (new exposure) Late Pleistocene key section Cheremoshnik (East European plain, middle of the Volga Basin of Yaroslavl) was conducted on a new methodological level using modern methods. For the first time, a series of paleosols (MIS5–MIS1) from the section offering significant information in regard to chronostratigraphy and landscape evolution have been studied in detail and dated. An excavation ∼7 m deep reveals a soil-sediment stratum which formed over the course of ∼115 ka in an accumulative beam-like terrace and consists of five lithological layers and six pedostratigraphical units.The base of the section was determined to be an Early Mikulino peat-dark humus paleosol which marked incipient subaerial pedogenesis on the Moscow (Riss II) moraine and was covered with a thickness of gyttja with a peat horizon (Histosol) which had formed 114–115 ka and was reliably dated using uranium–thorium dating. The following paleosols were successfully identified within the series of weak stone gullied-channel sediments within the Valdai (Wűrm) thickness (from bottom to top): (1) Bryansk paleosol (MIS3) – Gleysol – with three pedogenesis rhythms; (2) Trubchevskaya paleоsol – Gleyic Turbic Cryosol (MIS2) and (3) pedosediment formed at the end of the Bӧlling interstadial (MIS2). Terminal Pleistocene formations are marked with a gravelly stratum on the section's surface formed during the Preboreal period. Recent Regosol formed on loess-like loam deposits was identified at the top of the whole soil-sediment stratum. The 14C age of the paleosol humus varied between 27,500 and 11,400 cal. BP. The paleosols represent the northernmost occurrence of MIS5–MIS2 fossil soil in Europe, dominated by features of gleyzation, cryogenic aggregation, cracking, and humus and peat formation.Pollen analysis results allowed estimation of changes in vegetation cover, climatic conditions and the age of deposit sedimentation for the period from the Moskow Late Glacial to the Valdai Late Glacial and early Holocene times. Successive stages in the development of vegetation, high contents of alder and hazel pollen and the climax and distinct appearance of broadleaf trees relate the formation of biogenic sediments (LPAZ 2–6) in the Cheremoshnik section to the Mikulino Interglacial. Valdai (MIS4–MIS2) glacial sediment is absent within the investigated area.

Late Quaternary pedogenesis in periglacial zone of northeastern Europe near ice margins since MIS 3: Timing, processes, and linkages to landscape evolution

Two paleosol-sedimentary sequences Koskovo and Puzbol developed within the nearest periglacial zone of Valday glaciation of the East European Plain (56.7°–58.5° N, the Upper Volga River basin) were studied to reconstruct soil mantle and landscape evolution since Marine Isotope Stage (MIS) 3. The sequences are formed on terraces at 130–141 and 172m a.s.l., constituted by ancient (Early Valday (Würm) or Late Moscow (RissII)) lake clayey sediments. The buried paleosols are represented by system of horizons Hb–G3b (Histosol), Agb–G3b and AGb horizon (Umbric Gleysol). The 14C age of the paleosol humus and peat varied between 50,300–39,700 cal. BP. These paleosols were developed under forest-tundra and pine-spruce forests with the meadow plant communities and the areas of swampy vegetation according to palynological data from Puzbol. They represent the northernmost occurrence of the MIS3 fossil soil in Europe dominated by the features of gleyzation, cryogenic aggregation, cracking, and humus and peat formation. Clay coatings in the Middle Valday paleosols and pedosediments are products of Holocene pedogenesis.The upper lithological layers covering the MIS3 paleosols are loess-like (mantle) loams underlain by clayey Late Pleistocene lake deposits. They mark the presence of wide extraglacial lakes with existed within the Upper Volga basin during the maximum advance of the Valday glaciation (MIS2). Based on the stratigraphy of the studied sections, the highstands of these Late Quaternary lakes might exceed ≈170m a.s.l.For the first time it was possible to date the age of humus-clay coatings developed in the Bthk3 horizon (c.1.6–2.0m) of Puzbol where in the upper part of the section the Cutanic Albeluvisol formed. The Early Middle Holocene age of humic acid of humus-clay coatings (≈10,900 cal. BP) and carbonate nodules 7500–8180 cal. BP refer to the first stage of pedogenesis of this polygenetic soil, which occurred from pre-Boreal to the Atlantic period, and was characterized by dark humus accumulation and carbonate precipitation in a poorly drained landscape. The 14C age of the fulvic acids of these coatings (≈6130 cal. BP) is indicative of the beginning of the second stage, dominated by clay illuviation under a better drained, leaching environment.

EVOLUTION OF THE HUMUS CLAYEY MATERIAL OF THE CHERNOZEM HORIZON DURING LAND RECLAMATION OF SOLONETZES BY GROUNDING

Under the influence of the saline process (sodium exchange rate of 5-15% and specific electrical conductivity of the extract from the water-saturated paste ECse < 2 dSm/m) the well aggregated black earth material used for soil reclamation by means of hydromorphous black earth salt complexes starts to turn into a peptized state and is evolutionarily transformed into a texture-differentiated profile of saline soil. Part of the previously aggregated silt passes to the water-performed state and begins to move down the profile from 0-4 cm layer. Water-performed sludge consists of highly ordered complex mixed mica-smektite formations with a high content of smectite packets, hydro-mica, kaolinite, chlorite, as well as highly dispersed quartz. A distinctive feature of the soil surface horizons of the solonetz complex is the increased content of highly dispersed quartz of micron dimension. The composition of mineral components in the aggregated muds remains the same, but the share of hydro-mica increases, and mixed-layer mica-smektites have a more perfect structure due to less disordered structure in crystallites. The share of finely dispersed quartz in the aggregated silt fraction is less than that of water-peptized silt, and is more similar to that of loess-like loess-like loam, which is a soil-forming rock.

Palevye (pale) soils of Central Yakutia: Genetic specificity, properties, and classification

Permafrost-affected palevye (pale) soils of Central Yakutia are developed from mantle calcareous deposits of different textures and are characterized by the common mica-chloritic association of clay minerals with a higher content of chlorite in comparison with the soils developed from mantle loams and loess-like loams in the European part of Russia. In the pale soils, the distribution of clay minerals in the profile has an even pattern in the loamy variants and a differentiated pattern typical of podzols in the loamy sandy variants. Data on the chemical extracts and Mossbauer spectroscopy indicate that the iron in the pale soils is mainly fixed in silicate minerals. The content of nonsilicate iron represented by the amorphous and weakly crystallized compounds in the pale soils is relatively low. The humus-accumulative horizon in these soils is close to the gray-humus (soddy) AY horizon according to its acid-base characteristics (the soil pH and the degree of base saturation) despite the presence of exchangeable sodium and the shallow occurrence of the calcareous horizon.

MINERALOGICAL COMPOSITION AND SOIL MICROSTRUCTURE OF THE ACCUMULATIVE-DENUDATION LANDSCAPE OF THE NORTHERN PART OF THE FOREST STEPPE AND IN CASE OF MATERIAL EROSION

The distribution of clay minerals of the fraction less than 1 micron, extracted from typical, alkaline, podzolized agronomic black earths, depends on the type of soil, lithology of soil-forming rocks and relief. The silt fraction of agrochernozems developed on the quaternary loess-like heavy loam consists of smectite phase, represented by complex disordered mica-smectite formations, di-trioctahedral mica, kaolinite, chlorite. Agroblack soils formed on sediments in which include Neogene eluvium, contain a smectite phase represented by montmorillonite itself and badelyte with clinoptylolites in it. Erosion-resistant the material is represented by rounded aggregates, the structure of which was determined by micromorphological analysis. In the composition of micaceous micaceous fraction, extracted from this material, is dominated by micaceous mectritic formation. The conclusion is made about the demolition of the most valuable fertility of aggregated material - product of interaction smectite phase with organic matter.

Malacofauna of Late Quaternary Deposits from Muselievo, Northern Bulgaria

Assemblages of subfossil molluscs were found in Pleistocene and Holocene deposits in Muselievo (Northern Bulgaria). The fauna of the loess and loess-like loams included land snails typical of a relatively warm climate and dry, open habitats. Only the uppermost part of the profile contained an assemblage similar to those described from loess of Central Europe. The mollusc fauna of the Holocene deposits forming the terrace of the Osam River was distinctly richer. It reflects changes in sedimentary conditions and habitat types during the Subboreal and Subatlantic phases. The similarity of the assemblages from the two stratigraphical units suggests that climatic differences between particular warm and cold phases were much less pronounced in the Balkan Peninsula, compared to Central Europe.

Заселення вищими рослинами залізорудних відвалів Кривбасу

Описано природне заростання вищими рослинами відвалів гірничозбагачувальних комбінатів Кривбасу залежно від їх віку, екологічних умов і субстрату. Краще заростають відвали, складені лесовидними суглинками, потім – кварцитами, сумішшю цих субстратів, вапняками. Характер сукцесій, на думку авторів, залежить також від впливу алелопатичних чинників.

Preferential water flows in an ordinary chernozem of the Azov Plain

Preferential flows of gravitational water were studied with the use of modified grid lysimeters in an ordinary chernozem developed from loesslike loam on the slightly inclined Azov Plain. Within horizontal soil sections, the lysimetric water flow changed from high values to the complete absence at short (5–10 cm) distances. The funnel type of gravitational water flow concentration was noted. According to the character of changes in water infiltration during two consecutive cycles of soil watering, the zones with stable and altering (both increasing and decreasing) water flows were distinguished. No definite regularities of the changes in the concentration of the added label (chloride salts) in dependence on the intensity of the water flows and on the depth of the lysimeter installation were noted. Five days after the infiltration of considerable amounts of water (250 and 135 mm) into the soil monolith, the spatial variability of the concentration of the label was seen at distances of 5–15 cm.

New magnetic and paleomagnetic data from the Volodarka section (the Ob River)

New magnetic and paleomagnetic data from the loess-soil Volodarka section (the Ob River) are presented. In particular, a secondary magnetization aligned with the contemporary magnetic field and persisting on heating to 500–600°C is shown to be present. It is shown that the transition zone of the Matuyama-Brunhes reversal is most likely located within the soil complex, consisting of three paleosol horizons separated by two horizons of loesslike loam that belong to the same interglaciation.

Effect of the water content on the thermal diffusivity of clay loams with different degrees of salinization in the Transvolga region

The effect of readily soluble salts on the thermal diffusivity of undisturbed fine-textured loess-like loam was considered. It was shown that the thermal diffusivity of loams depends not only on the salt content but also on the water content. The higher the content of salts, the higher the soil thermal diffusivity is in the dry state. The differences between the thermal diffusivities of nonsaline and saline soils decrease under wetting conditions. No differences are observed at the water content corresponding to the capillary water capacity.

Characteristics and forecasting of subsidence phenomena on reservoir banks

The paper deals with the mechanism of subsidence phenomena in loess-like loam under elevation of groundwater level in reservoir banks. The paper presents a classification of subsidence phenomena, short characteristics of types distinguished, mechanism of subsidence formation and prediction of the range of subsidence phenomena.

Nature of the influence of moistening of cohesive soils with salt solutions on soil compaction (on the example of loess-like loams) : Reltov, B F; Ermolaeva, A N US Army Cold Regions Research and Engineering Lab translation TL 640, July 1977, 13P

Nature of the influence of moistening of cohesive soils with salt solutions on soil compaction (on the example of loess-like loams) : Reltov, B F; Ermolaeva, A N US Army Cold Regions Research and Engineering Lab translation TL 640, July 1977, 13P