Technique for preparation thin sections of structural soil aggregates of certain size fractions

  • V. M. Yakovenko
Keywords: soil structure, soil micromorphology, method of studying soil properties


Morphological properties of poil aggregate aer developed in the process of pedogenesis and reflect the complex of structure formation processes. The peds' size, shape, and internal structure are peculiar to each corresponding soil type and genetic horizon. The technique proposed allows preparing thin sections on every sizes of structural units and, in contrast to known methods, it provides not only a ped immobilization in the mass of fixing material, but also pore space saturation with natural resin. It is also possible to prepare the sections with marking of large aggregates orientation in space; it requires application of gypsum marks on the aggregate surface in the process of their sampling from the soil profile. The technique modified consists of following stages: selection of aggregates with required fractions; preparation of sections with separate aggregates larger than 5 mm; preparation of sections with aggregations smaller than 5 mm. In preparation of aggregates larger than 5 mm, a technique similar to that of preparing large soil block samples is used because it makes possible to process each soil aggregate separately. Another approach is required for processing of structural units up to 5 mm in size because it is impossible to prepare a section of individual issue with this size. The problem is solved when the units are saturated and processed not separately, but as a whole block sample which include a mass with peds of separate fraction. For this purpose, it is required to prepare cups comprised of walls from thick paper and a gypsum bottom. For preparation the caps use a gypsum in the form of fine white powder rapidly solidified in addition of water in a certain proportion and forms a firm bottom of the paper сup. Cut out a square of 4×4 cm in size and a strip from thick paper and glue them together to gain a tube of 5 cm in height and 1.5–2 cm in diameter (i.e. 10×5 cm). Apply on the paper squares a prepared gypsum mass sufficient to retention of the paper tube until gypsum hardening.  Fill a fraction of aggregates into the prepared cup in one-third of its height and cover it with prepared fixing substance with solvent. Saturation is carried out in accordance with the standard technique of section preparing using natural resins (Gagarina, 2004). After complete saturation, paper cups with a mass of aggregates in them turn into monoliths that should be processed in the same way as large soil samples. As a result of all operations, significant number of structural soil aggregates with same sizes may be found within the section plane.


Balalayev, A. K., Yakovenko, V. N. (2002). Analiz svyazi ekologicheskikh kharakteristik pochv i prostranstvennykh pokazateley pochvennykh agregatov [Analysis of the relationship between soil ecological characteristics and spatial indicators of soil aggregates]. Gruntoznavstvo, 3 (3–4), 27–39 (in Russian).
Bullock, P., Fedoroff, N., Jongerius, A., Stoops, G., Tursina, T. (1985). Handbook for Soil Thin Section Description., Wolverhampton, UK: Waine Research.
Belova, N. A. (1997). Ekologiya, mikromorfologiya, antropogenez lesnykh pochv stepnoy zony Ukrainy [Ecology, micromorphology, anthropogenesis of forest soils of the steppe zone of Ukraine]. Dnepropetrovsk State University, Dnepropetrovsk (in Russian).
Bulejko, A. A. (2007). Osobennosti makromorfologicheskogo i mikromorfologicheskogo stroyeniya ternovnikovykh edafotopov Prisamar'ya [Special qualities of the macromorphological and micromorphological structure of sloe edaphotopes of Prisamarye]. Gruntoznavstvo, 8 (1–2), 49–58 (in Russian).
Vadyunina, A. F., Korchagina, Z. A. (1986). Metody issledovaniia fizicheskikh svojstv pochvy [Methods of study of soil physical properties]. Moscow (in Russian).
Voronin, A. D., (1986). Osnovy fiziki pochv [Fundamentals of Soil Physics]. Moscow University Press, Moscow (in Russian).
Gagarina, E. I. (2004). Mikromorfologicheskij metod issledovaniia pochv [Micromorphological method of soil studying]. St. Petersburg University Press, St. Petersburg (in Russian).
Dobrovolsky, G. V. (1983). Metodicheskoiy rukovodstvo po mikromorfologii pochv [Methodological guide to soil micromorphology]. MSU, Moscow (in Russian)
Jangorzo, N. S., Schwartz, C., Watteau, F. (2014). Image analysis of soil thin sections for a non-destructive quantification of aggregation in the early stages of pedogenesis. Eur J Soil Sci., 65, 485–498. DOI: 10.1111/ejss.12110.
Jongerius, A., Heinzberger, G. (1975). Methods in soil micromorphology. Soil survey papers 10. Wageningen.
Kornblyum, E. A. (1975) Osnovnyye urovni organizatsii pochvennoy massy [Basic levels of soil mass organization]. Soviet Soil Science, 9, 36–48 (in Russian).
Murphy, C. P. (1986). Thin Section Preparation of Soils and Sediments. In: AB Academic Publ., Berkhamsted.
Parfyonova, E. I., Yarilova, E. A. (1977). Rukovodsyvo k mikromorfologicheskim issledovaniiam v pochvovedenii [A guide to the micromorphological studies in soil science]. Nauka, Moscow (in Russian).
Polsky, M. N. (1949). K voprosu o poroznosti pochvennykh agregatov [To the question of soil aggregate porosity]. Soviet Soil Science, 4, 212–223 (in Russian).
Polsky, M. N. (1955). O nekotorykh novykh putyakh izucheniya poroznosti i struktury pochvy [To the question of porosity of soil aggregates]. Soviet Soil Science, 5, 29–43 (in Russian).
Polyakov, A. N. (1965) Metodika prigotovleniya shlifov iz pochvoobrazuyushchikh porod dlya mikromorfologicheskikh izmereniy [Methods for the preparation of thin sections from parent rocks for micromorphological measurements]. Soviet Soil Science, 9, 86–90 (in Russian).
Rozanov, B. G. (2004). Morfologiia pochv [Morphology of soils]. Academic Project, Moscow (in Russian).
Ringrose-Voase, A. J. (1991). Micromorphology of Soil Structure: Description, Quantification, Application. Australian Journal of Soil Research, 29, 777–813.
Yakovenko, V. N. (2000). Voprosy metodiki izgotovleniya prozrachnykh shlifov strukturnykh agregatov pochv [Issues of the methodology for the manufacture of transparent thin sections of soil structural aggregates]. Issues of steppe forestry and forest eclamation of soils, 4, 148–152. (in Russian).
Yakovenko, V. N. (1999). Mikromorfologiya vodoprochnykh agregatov lesnykh pochv v stepi [Micromorphology of water-resistant aggregates of forest soils in the steppe]. Ecology and Noospherology, 6 (1-2), 212–215 (in Russian).
Yakovenko, V. N. (2001). Mikromorfologiya strukturnykh agregatov pochv lesnykh kul'turbiogeotsenozov [Micromorphology of structural aggregates of soils of forest crops biogeocenoses]. Issues of steppe forestry and forest eclamation of soils, 3, 112–116 (in Russian).
Yakovenko, V. M., Bilova N. A. (2018). Biohenne mikrostrukturoutvorennya lisovykh hruntiv stepovoyi zony Ukrayiny [Biogenic microstructure of forest soils of the steppe zone of Ukraine]. Dnipro: Serednyak (in Ukrainian).
FitzPatrick, E. A. (1993). Soil microscopy and micromorphology, Chichester; New York: J. Wiley.
Stoops, G. (2003). Guidelines for Analysis and Description of Soil and Regolith Thin Sections. Madison, WI, Soil Science Society of America.

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Yakovenko, V. (2019). Technique for preparation thin sections of structural soil aggregates of certain size fractions. Fundamental and Applied Soil Science, 19(2), 55-58.

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