FTIR photoacoustic spectroscopy was used to approach inorganic matrix components and organic-matter constituents of chernozem size fractions (1–5000 μm, by dry sieving) with a different history use (from intact steppe permanent bare fallow, continuous long-term field experiment). The conditions measurements in continuous-scan modes were compared attenuated total reflection measurements, the advantages resulting from higher intensity incident radiation signal-generating volume discussed....

This study aims to compare photoacoustic (FTIR–PAS), diffuse reflectance (DRIFT), and attenuated total reflection (ATR) FTIR modalities in the wide wavenumber range from NIR (7500 cm−1) FIR (150 for same silicate soil samples under conditions. The possibilities of non-destructive rapid qualitative analysis soils by these without comprehensive data treatment were compared. assignment more than 100 bands chernozem sod-podzolic as common types was made. following groups organic matter inorganic...

The capabilities of temperature-monitored IR spectroscopy for studying the organic matter and mineral composition humic substances (HS) were tested. Temperature dependences mid-IR spectra heated in air range 25–215 °C (298–488 K, with a step 2.5 °C)—for three commercially available samples isolated from brown coal (leonardite)—were performed. characteristic bands identified, their changes band maxima positions intensities compared. From viewpoint interpretation HS components, divided into...

Granulometric fractionation as a source of additional information on organic-matter and inorganic matrix components soils using FTIR–photoacoustic spectroscopy (FTIR–PAS) supported by attenuated–total reflection FTIR (ATR–FTIR) for wide range aggregate fractions (10–5000 μm) was used to compare the sensitivity, reproducibility, contents, representativity fractionated samples. For chernozem sod-podzolic different agricultural-use samples, differences in composition were found, manifested...

Review sums up the application of photoacoustic and photothermal spectroscopies for analysis characterization soils soil organic matter discusses outlooks in this area.

Rare earth elements (REEs) have received enormous attention in recent years. However, there are many gaps the understanding of their behavior soil-plant system. The aim this study is to investigate three most common REEs (La, Ce, Nd) system directly on soil samples using barley (Hordeum vulgare L.) a vegetation experiment. We attribute absence significant changes plant biomass and photosynthetic pigment content reduced availability samples. concentration water-soluble forms La, Ce Nd didn't...

Environmental contextThe role of rare earth elements in soil–plant systems remains unclear. We use continuous-flow extraction, designed to mimic natural conditions while minimising artefacts, study vitro chemical fractionation soil. The reveals a predominant association and metal-organic complexes independent soil type contamination, thereby provides valuable insights into the behaviour these systems. AbstractThe (REEs) has attracted increasing attention but still somewhat Along invivo...

Long-term application of organic and mineral fertilizers can lead to changes in the elemental composition agroecosystem components. Both levels nutrients potentially toxic elements change, as potential for these be available plants through soil properties. Soil plant samples two species (pea Pisum sativum L. oat Avena sativa L.) were collected from plots a long-term field experiment on their combinations gray forest soils Vladimir region, Russia. 0-20 20-40 cm layers subjected acid digestion...

Diffuse reflectance FTIR measurements with two-dimensional correlation spectroscopy (2D-COS) are used for accurate band identification of chernozem comprising soil organic matter (SOM), including humic substances and mineral silicate matrix. Samples different land use (native steppe, shelterbelt, bare fallow, arable land) a long-term field experiment were compared. Homospectral 2D-COS maps size fractions obtained by wet fractionation built, the fraction was as correlation-building variable...

Temperature-dependent IR spectroscopy capable of revealing specific changes in the band intensities, positions, and shape was used to increase information on humic substances (HS) from soils. Temperature dependences spectra HS isolated silicate-based soils differing contents nature organic matter, chernozem soddy podzolic soil, were investigated by attenuated total internal reflection FTIR mid-IR region (4000–400 cm−1) air within moderate temperature range 25–215 °C (298–488 K) with a step...

The article provides data on a comparative analysis of the features vegetation restoration in areas oligotrophic bogs with high degree oil product pollution, located territory an field Middle Ob region, reclaimed according to standard schemes, widely used 2000s, and by cutting off oil-contaminated soil. total projective cover (TPVC) all mostly reaches values (above 30%). TPVC without is slightly higher than due difference recovery time favor former. At same time, average number recorded...

The physicochemical parameters, vegetation and biodiversity of microbiomes inhabiting 10-, 35- 50-year-old embryonic soils (technozems) formed in the mining areas Kursk Magnetic Anomaly (Russia) were analyzed current study. Analysis taxonomic diversity was carried out by 454-pyrosequencing V4 variable region 16S rRNA gene. All points chronosequence characterized reliably differing composition. older dump, higher proportion bacteria from phyla Actinobacteria (mostly representatives...

Due to the complexity and heterogeneity of soil organic matter, a very wide range methods approaches is used study it. This generates an excessive number terms, definitions indices, which makes it difficult understand interpret data different authors. The paper provides overview currently most relevant for studying matter (SOM) its mineral matrix. review considers concept pools fractions, carbon saturation. main assessing content, structure, structure are described. estimation composition...

The lithogenous minerals containing lantanides (Ln) are unsustainable within the zone of hypergenesis. Their dilution impoverish soils in terms content, especially humid regions. In conditions neutral environmental pH dry steppe zone, loose their mobility, and, hence, become unavailable for plants. characterized by high biochemical and biological activity. physiologic impact on plants is set. separate parts vascular accumulate different degree. difference may reach 100-fold level. For many...

Membrane fractionation with track-etched membranes was used to size-profile the microelement composition of water-extractable soil colloids (WESCs). The aim study is element narrow WESC fractions typical chernozems in range 0.01–10 µm. Micro-/ultrafiltration through a cascade polycarbonate membrane filters pore sizes 5, 2, 1, 0.8, 0.4, 0.2, 0.1, 0.05, 0.03, and 0.01 µm at room temperature used. ICP–AES using direct spraying obtained without decomposition used; Al, Ba, Cd, Cr, Cu, Fe, Mn, Si,...

The geochemical specificities of mountainous soils Middle Ural on the example Basegi Ridge were considered in this work. We calculated and analyzed coefficients accumulation, subsurface weathering, eluviation oxidation. It is shown that soil forming processes Severniy Baseg Mountain don't lead to clear differentiation profile according content one or another microelements. level concentrations elements landscapes was increased from elluvial transaccumulative. This determined by increasing...