Relevant bibliographies by topics / Soil enrichment

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  1. Journal articles
  2. Dissertations / Theses
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  4. Book chapters
  5. Conference papers
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Academic literature on the topic 'Soil enrichment'

Author: Grafiati
Published: 4 June 2021
Last updated: 8 February 2022

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Journal articles on the topic "Soil enrichment"

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Wang, Bai, Liu, Zhang, Chen, and Lu. "Enrichments of Cadmium and Arsenic and Their Effects on the Karst Forest Area." International Journal of Environmental Research and Public Health 16, no. 23 (November 22, 2019): 4665. http://dx.doi.org/10.3390/ijerph16234665.

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An understanding of the enrichment mechanisms of cadmium (Cd) and arsenic (As) in the process of rock weathering and soil formation is essential to develop agriculture according to local conditions. However, the enrichments of soil Cd and As under natural background conditions in karst areas are still uncertain. The enrichment factor, geo-accumulation index, redundancy analysis, and other methods were used to analyze the enrichment degree and the influencing factors of Cd and As on 5 rock–soil profiles and 15 topsoil samples, which were collected from a karst forest area in Libo County, Guizhou Province. The results showed that the enrichment process was divided into three stages. In the first stage, Cd and As were enriched in carbonate rocks, and their mean concentrations were 1.65 and 3.9 times those of the corresponding abundance of the crust. In the second stage, the enrichment of the parent rock into the soil, the enrichment factors of Cd and As in the parent material horizon relative to the bedrock horizon were 9.2 and 2.82, respectively. The third stage refers to the enrichments of Cd and As in the topsoil, where Cd enrichment was more obvious than that of As. Soil organic matter (SOM) and phosphorus (P) are important factors that influenced the enrichments of Cd and As in the topsoil. The functional groups of SOM were complexed with Cd and As; P easily formed precipitates with Cd, and the tree litter was fed back to the topsoil, which may be the reason for the surface enrichment of Cd and As. This study will help the scientific community understand the enrichment mechanisms of soil Cd and As in karst areas.
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Wawrik, Boris, Lee Kerkhof, Jerome Kukor, and Gerben Zylstra. "Effect of Different Carbon Sources on Community Composition of Bacterial Enrichments from Soil." Applied and Environmental Microbiology 71, no. 11 (November 2005): 6776–83. http://dx.doi.org/10.1128/aem.71.11.6776-6783.2005.

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ABSTRACT Soil is a highly heterogeneous matrix, which can contain thousands of different bacterial species per gram. Only a small component of this diversity (maybe <1%) is commonly captured using standard isolation techniques, although indications are that a larger proportion of the soil community is in fact culturable. Better isolation techniques yielding greater bacterial diversity would be of benefit for understanding the metabolic activity and capability of many soil microorganisms. We studied the response of soil bacterial communities to carbon source enrichment in small matrices by means of terminal restriction fragment length polymorphism (TRFLP) analysis. The community composition of replicate enrichments from soil displayed high variability, likely attributable to soil heterogeneity. An analysis of TRFLP data indicated that enrichment on structurally similar carbon sources selected for similar bacterial communities. The same analysis indicated that communities first enriched on glucose or benzoate and subsequently transferred into medium containing an alternate carbon source retained a distinct community signature induced by the carbon source used in the primary enrichment. Enrichment on leucine presented a selective challenge that was able to override the imprint left by primary enrichment on acetate. In a time series experiment community change was most rapid 18 hours after inoculation, corresponding to exponential growth. Community composition did not stabilize even 4 days after secondary enrichment. Four different soil types were enriched on four different carbon sources. TRFLP analysis indicated that in three out of four cases communities enriched on the same carbon source were more similar regardless of which soil type was used. Conversely, the garden soil samples yielded similar enrichment communities regardless of the enrichment carbon source. Our results indicate that in order to maximize the diversity of bacteria recovered from the environment, multiple enrichments should be performed using a chemically diverse set of carbon sources.
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Tesfahunegn, G. B., and P. G. L. Vlek. "Assessing sediment enrichment ratio in Mai-Negus catchment, northern Ethiopia." Soil and Water Research 9, No. 1 (January 23, 2014): 38–45. http://dx.doi.org/10.17221/16/2013-swr.

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Soil degradation is a threat to sustainable development in Ethiopia. However, degradation indicators, such as sediment enrichment ratio (SER), are not adequately documented in literature. This study aims to investigate the SER of different erosion-status sites (aggrading, stable, eroded) in various landforms in Mai-Negus catchment, northern Ethiopia. The erosion-status sites in the landforms were identified using field indicators, and soil samples were collected for analysis of selected soil parameters. In this study, due to the ratio of aggrading to eroded or stable sites at catchment and landform levels, the SER of soil nutrients and fine soil particles was &gt; 1. But due to the ratio of aggrading to eroded sites in the landforms the average SER of the soils were higher (1.42&ndash;7.22) as compared to the ratios of aggrading to stable sites (1.10&ndash;3.66). The SER significantly (P &le; 0.05) differed among the landforms, which indicated differences in the effect of erosion. The relationships between the SER of fine soil particles and soil nutrients were strong. Thus, priority for introducing appropriate anti-erosion measures should be given to sources of high SER sites such as the mountainous and central ridge landforms in the catchment using the limited resources available.
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DRURY, C. F., D. A. TEL, and E. G. BEAUCHAMP. "15N ANALYSIS OF HIGHLY ENRICHED SAMPLES ON A MASS SPECTROMETER." Canadian Journal of Soil Science 67, no. 4 (November 1, 1987): 779–85. http://dx.doi.org/10.4141/cjss87-075.

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Mass spectrometer analysis of highly enriched 15N samples underestimated the 15N enrichment. Conventional 15N analysis utilizes a ratiometer procedure in which the ratio of 29N2 to 28N2 ions is determined. Samples containing high enrichments had a low quantity of 28N2 ions and it appeared background contamination of 28N2 produced erroneous results with this procedure. Therefore, results obtained with the ratiometer procedure were compared to those obtained with a scanning procedure which measured the 28N2, 29N2 and 30N2 peak heights. The 15N enrichment was determined by the scanning procedure by using all three N2 peaks (28/29/30 method), the 28N2 and 29N2 peaks (28/29 method), and 29N2 and 30N2 peaks (29/30 method). These four methods were compared over a range of enrichments from 0.366 to 99 atom % 15N in samples containing 0.5, 1.0 and 1.5 mg N. Samples with enrichments less than 10 atom % 15N were best estimated by the ratiometer method. Enrichments greater or equal to 10 atom % 15N were most accurately determined by the 29/30 method. Background contamination during sample preparation produced 28N2 peaks which had a negligible effect on samples containing low enrichments, but was a source of error in highly enriched samples. Since natural levels of 29N2 and 30N2 in air are very low, the 29/30 method was found to closely estimate the expected 15N enrichment in standard samples greater than 10 atom % and had the lowest standard deviation. Key words: High 15N enrichment, mass spectrometer, ratiometer procedure, peak scanning procedure
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Shim, J. H., H. H. Powers, C. W. Meyer, A. Knohl, T. E. Dawson, W. J. Riley, W. T. Pockman, and N. McDowell. "Hydrologic control of the oxygen isotope ratio of ecosystem respiration in a semi-arid woodland." Biogeosciences 10, no. 7 (July 23, 2013): 4937–56. http://dx.doi.org/10.5194/bg-10-4937-2013.

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Abstract. We conducted high frequency measurements of the δ18O value of atmospheric CO2 from a juniper (Juniperus monosperma) woodland in New Mexico, USA, over a four-year period to investigate climatic and physiological regulation of the δ18O value of ecosystem respiration (δR). Rain pulses reset δR with the dominant water source isotope composition, followed by progressive enrichment of δR. Transpiration (ET) was significantly related to post-pulse δR enrichment because the leaf water δ18O value showed strong enrichment with increasing vapor pressure deficit that occurs following rain. Post-pulse δR enrichment was correlated with both ET and the ratio of ET to soil evaporation (ET/ES). In contrast, the soil water δ18O value was relatively stable and δR enrichment was not correlated with ES. Model simulations captured the large post-pulse δR enrichments only when the offset between xylem and leaf water δ18O value was modeled explicitly and when a gross flux model for CO2 retro-diffusion was included. Drought impacts δR through the balance between evaporative demand, which enriches δR, and low soil moisture availability, which attenuates δR enrichment through reduced ET. The net result, observed throughout all four years of our study, was a negative correlation of post-precipitation δR enrichment with increasing drought.
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Shim, J. H., H. H. Powers, C. W. Meyer, A. Knohl, T. E. Dawson, W. J. Riley, W. T. Pockman, and N. McDowell. "Hydrologic control of the oxygen isotope ratio of ecosystem respiration in a semi-arid woodland." Biogeosciences Discussions 10, no. 1 (January 2, 2013): 1–48. http://dx.doi.org/10.5194/bgd-10-1-2013.

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Abstract. We conducted high frequency measurements of the δ18O value of atmospheric CO2 from a juniper (Juniperus monosperma) woodland in New Mexico, USA, over a four-year period to investigate climatic and physiological regulation of the δ18O value of ecosystem respiration (δR). Rain pulses reset δR with the dominant water source isotope composition, followed by progressive enrichment of δR. Transpiration (ET) was significantly related to post-pulse δR enrichment because leaf water δ18O value showed strong enrichment with increasing vapor pressure deficit that occurs following rain. Post-pulse δR enrichment was correlated with both ET and the ratio of ET to soil evaporation (ET / ES). In contrast, soil water δ18O value was relatively stable and δR enrichment was not correlated with ES. Model simulations captured the large post-pulse δR enrichments only when the offset between xylem and leaf water δ18O value was modeled explicitly and when a gross flux model for CO2 retro-diffusion was included. Drought impacts δR through the balance between evaporative demand, which enriches δR, and low soil moisture availability, which attenuates δR enrichment through reduced ET. The net result, observed throughout all four years of our study, was a negative correlation of post-precipitation δR enrichment with increasing drought.
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Grosser, Robert J., Michael Friedrich, David M. Ward, and William P. Inskeep. "Effect of Model Sorptive Phases on Phenanthrene Biodegradation: Different Enrichment Conditions Influence Bioavailability and Selection of Phenanthrene-Degrading Isolates." Applied and Environmental Microbiology 66, no. 7 (July 1, 2000): 2695–702. http://dx.doi.org/10.1128/aem.66.7.2695-2702.2000.

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ABSTRACT The sorption of organic contaminants by natural organic matter (NOM) often limits substrate bioavailability and is an important factor affecting microbial degradation rates in soils and sediments. We hypothesized that reduced substrate bioavailability might influence which microbial assemblages are responsible for contaminant degradation under enrichment culture conditions. Our primary goal was to characterize enrichments in which different model organic solid phases were used to establish a range of phenanthrene bioavailabilities for soil microorganisms. Phenanthrene sorption coefficients (expressed as log KD values) ranged from 3.0 liters kg−1 for Amberlite carboxylic acid cation-exchange resin (AMB) to 3.5 liters kg−1 for Biobeads polyacrylic resin (SM7) and 4.2 liters kg−1 for Biobeads divinyl benzene resin (SM2). Enrichment cultures were established for control (no sorptive phase), sand, AMB, SM7, and SM2 treatments by using two contaminated soils (from Dover, Ohio, and Libby, Mont.) as the initial inocula. The effects of sorption by model phases on the degradation of phenanthrene were evaluated for numerous transfers in order to obtain stable microbial assemblages representative of sorptive and nonsorptive enrichment cultures and to eliminate the effects of the NOM present in the initial inoculum. Phenanthrene degradation rates were similar for each soil inoculum and ranged from 4 to 5 μmol day−1 for control and sand treatments to approximately 0.4 μmol day−1 in the presence of the SM7 sorptive phase. The rates of phenanthrene degradation in the highly sorptive SM2 enrichment culture were insignificant; consequently, stable microbial populations could not be obtained. Bacterial isolates obtained from serial dilutions of enrichment culture samples exhibited significant differences in rates of phenanthrene degradation performed in the presence of SM7, suggesting that enrichments performed in the presence of a sorptive phase selected for different microbial assemblages than control treatments containing solid phase phenanthrene.
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Friedrich, M., R. J. Grosser, E. A. Kern, W. P. Inskeep, and D. M. Ward. "Effect of Model Sorptive Phases on Phenanthrene Biodegradation: Molecular Analysis of Enrichments and Isolates Suggests Selection Based on Bioavailability." Applied and Environmental Microbiology 66, no. 7 (July 1, 2000): 2703–10. http://dx.doi.org/10.1128/aem.66.7.2703-2710.2000.

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ABSTRACT Reduced bioavailability of nonpolar contaminants due to sorption to natural organic matter is an important factor controlling biodegradation of pollutants in the environment. We established enrichment cultures in which solid organic phases were used to reduce phenanthrene bioavailability to different degrees (R. J. Grosser, M. Friedrich, D. M. Ward, and W. P. Inskeep, Appl. Environ. Microbiol. 66:2695–2702, 2000). Bacteria enriched and isolated from contaminated soils under these conditions were analyzed by denaturing gradient gel electrophoresis (DGGE) and sequencing of PCR-amplified 16S ribosomal DNA segments. Compared to DGGE patterns obtained with enrichment cultures containing sand or no sorptive solid phase, different DGGE patterns were obtained with enrichment cultures containing phenanthrene sorbed to beads of Amberlite IRC-50 (AMB), a weak cation-exchange resin, and especially Biobead SM7 (SM7), a polyacrylic resin that sorbed phenanthrene more strongly. SM7 enrichments selected for mycobacterial phenanthrene mineralizers, whereas AMB enrichments selected for a Burkholderia sp. that degrades phenanthrene. Identical mycobacterial andBurkholderia 16S rRNA sequence segments were found in SM7 and AMB enrichment cultures inoculated with contaminated soil from two geographically distant sites. Other closely relatedBurkholderia sp. populations, some of which utilized phenanthrene, were detected in sand and control enrichment cultures. Our results are consistent with the hypothesis that different phenanthrene-utilizing bacteria inhabiting the same soils may be adapted to different phenanthrene bioavailabilities.
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Hardy, Kathleen R., and Gary M. King. "Enrichment of High-Affinity CO Oxidizers in Maine Forest Soil." Applied and Environmental Microbiology 67, no. 8 (August 1, 2001): 3671–76. http://dx.doi.org/10.1128/aem.67.8.3671-3676.2001.

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ABSTRACT Carboxydotrophic activity in forest soils was enriched by incubation in a flowthrough system with elevated concentrations of headspace CO (40 to 400 ppm). CO uptake increased substantially over time, while the apparent Km (app Km ) for uptake remained similar to that of unenriched soils (<10 to 20 ppm). Carboxydotrophic activity was transferred to and further enriched in sterile sand and forest soil. The app Km s for secondary and tertiary enrichments remained similar to values for unenriched soils. CO uptake by enriched soil and freshly collected forest soil was inhibited at headspace CO concentrations greater than about 1%. A novel isolate, COX1, obtained from the enrichments was inhibited similarly. However, in contrast to extant carboxydotrophs, COX1 consumed CO with an app Km of about 15 ppm, a value comparable to that of fresh soils. Phylogenetic analysis based on approximately 1,200 bp of its 16S rRNA gene sequence suggested that the isolate is an α-proteobacterium most closely related to the genera Pseudaminobacter, Aminobacter, andChelatobacter (98.1 to 98.3% sequence identity).
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Zhou, Wenxiang, Guilin Han, Man Liu, Chao Song, and Xiaoqiang Li. "Geochemical Distribution Characteristics of Rare Earth Elements in Different Soil Profiles in Mun River Basin, Northeast Thailand." Sustainability 12, no. 2 (January 7, 2020): 457. http://dx.doi.org/10.3390/su12020457.

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Exploring the distributions of rare earth elements (REEs) in soil profiles is essential to understanding how natural and anthropogenic factors influence the geochemical behaviors of REEs. This study aimed to learn about the distribution characteristics of REEs in soils, including their fractionation and enrichment, and to explore the influence of soil pH and soil organic carbon (SOC) on REEs. One hundred and three samples were collected from six soil profiles under different land uses (paddy field: T1, T3; forest land: T2, T6; wasteland: T4; building site: T5) in the Mun River Basin, Northeast Thailand. The average total REE contents (∑REE) are much lower (<80 mg kg−1) than that of Earth’s crust (153.80 mg kg−1) in soil profiles T2, T3, T4, and T6. The contents of REEs tend to increase slightly with depth in all soil profiles. The ratios of (La/Yb)N range from 0.35 to 0.96 in most samples, indicating that the enrichment of heavy REEs (HREEs) relative to light REEs (LREEs) is the main fractionation pattern. Samples from profile T2 show relatively obvious negative Ce anomalies (0.55–0.78) and positive Eu anomalies (1.41–1.56), but there are almost no anomalies of Ce and Eu in other soil profiles. Enrichment factors of LREEs (EFLREEs) range from 0.23 to 1.54 and EFHREEs range from 0.34 to 2.27, which demonstrates that all soil samples show no LREE enrichment and only parts of samples show minor HREE enrichment. Soil organic carbon (SOC) contents positively correlate with the enrichment factors of REEs (EFREE) in soil profiles T1 (R = 0.56, p < 0.01) and T6 (R = 0.71), while soil pH values correlate well with EFREE in soil profiles T2 (R = 0.75) and T4 (R = −0.66, p < 0.01), indicating the important influence of soil pH and SOC on the mobility of REEs in some soil profiles.
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Dissertations / Theses on the topic "Soil enrichment"

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Kim, Sang-Jun. "Bioaugmentation for the remediation of pesticide-contaminated soil with microorganisms directly enriched in soil or compost." Columbus, Ohio : Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1062640058.

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Thesis (Ph. D.)--Ohio State University, 2003.
Title from first page of PDF file. Document formatted into pages; contains xv, 160 p.; also includes graphics. Includes abstract and vita. Advisor: Warren A. Dick, Environmental Science Graduate Program. Includes bibliographical references (p. 135-160).
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Hultman, Kristine A. "Process level significance of changes to soil nitrification due to nitrogen enrichment." Thesis, University of Aberdeen, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.424946.

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Our ability to predict and model the consequences of N deposition depends on our understanding of the mechanisms of N cycling. The research detailed in this thesis investigates the impact of enhanced nitrogen loading on nitrification and mineralisation in soils from two contrasting sites in Britain.  The first site is Deepsyke Forest, a Sitka spruce plantation situated in the Scottish borders.  The second site is Pwllpeiran an upland grass heath in Mid Wales.  The stable isotope, 15N, was used to measure gross mineralisation and nitrification rates at each site. This was used in conjunction with acetylene, a physiological block, which inhibits the oxidation of ammonium to nitrite; ascertain whether the dominant form of nitrification at each site was autotrophic or heterotrophic. Inorganic N concentrations at Deepsyke were highly variable.  NO3- levels were low at both sites but particularly at Deepsyke.  This had a major impact on the methodology used in the determination of gross transformation rates, and the subsequent analysis and interpretation of the results. Nitrification at Deepsyke was predominantly heterotrophic and rates whereas nitrification at Pwllpeiran was predominantly autotrophic. The results of a 20-day potential nitrification assay indicate that S deposition is inhibiting nitrification, while enhanced N loading is stimulating it.  No other effects of N, S or acid deposition were detectable at Deepsyke.  Similarly, no effects of N loading were found, however it was observed that heavy grazing reduced NH4+ concentrations.
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Wacha, Kenneth Michael. "From soilscapes to landscapes: a landscape-oriented approach to simulate soil organic carbon dynamics in intensely managed landscapes (IMLS)." Diss., University of Iowa, 2016. https://ir.uiowa.edu/etd/6327.

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The primary objective of this research was to develop a landscape-oriented, process-based approach that can enhance understanding and prediction of SOC fluxes in IMLs by incorporating the key mechanisms impacting soil carbon dynamics when moving from the soilscape to the landscape. The mechanisms that are considered to be the focus of this study are redistribution of SOC due to erosion and deposition without neglecting the importance of litter incorporation into the soil column, decomposition due to microbial activity, and physical and chemical stabilization of carbon. To accomplish this objective, field experiments were performed to examine how selective entrainment of different soil size fractions, quantified through the enrichment ratio (ER), varies with management and hillslope position. Differential modes in soil mobilization between rill and interrill areas were either elevated or dampened depending on the prevalent management practice, the gradient of the site and landscape position. Sites where sediment and runoff fluxes were highest were found to have lower ER values (around unity) due to the mobilization of all size classes making static and dynamic samples almost identical. The size fractions analyzed in these experiments were found to have varying levels of carbon associated with them, especially the larger aggregates, which encapsulate organic material. Neglecting them in transport estimates could lead to large errors in predicted fluxes of SOC. For this reason, a careful attention was placed on identifying how aggregate stability varies with respect to management and hillslope position, through controlled experiments looking size distributions to reflect tillage disturbance and aggregate stability to assess resistance to rainsplash. Lastly, a landscape-oriented modeling framework was developed that captures not only the SOC spatial heterogeneity in IMLs but also determines the impacts that redistribution has on this heterogeneity and ultimately on SOC dynamics. The integrative modeling framework considers the collective effects of both rainsplash/rainfall- and tillage-induced erosion on SOC redistribution in IMLs through an ER-module developed and woven within this framework to connect an upland erosion model with a soil biogeochemical model. It provides not only size fraction updates to the active layer and ER values, but also explicitly considers the effects of splash-driven interrill erosion on those ER estimates. The model was applied to twentieth-century changes in SOC across a representative agricultural hillslope in the study watershed and compared to recent SOC data. The chronosequence in SOC storage within the erosional zone revealed that soils were continually depleted of the rich organic matter long after the 1930’s “Dust bowl” due to enhanced erosion that accompanied agricultural practices. However, conservation tillage and enhanced crop production that began in the late 1980’s reversed the downward trend in SOC losses, causing nearly 26% of the lost SOC to be regained. Results from this study can be used to aid policy and decision makers in developing a food-system that accounts for the co-evolution of human and natural activity, to develop sustainable agro-ecosystems through the use of data supported recommended best management practices.
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Borisova, Ralitsa Bogomilova. "Isolation of a Rhodococcus Soil Bacterium that Produces a Strong Antibacterial Compound." Digital Commons @ East Tennessee State University, 2011. https://dc.etsu.edu/etd/1388.

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Rhodococci are notable for their ability to degrade a variety of natural and xenobiotic compounds. Recently, interest in Rhodococcus has increased due to the discovery of a large number of genes for secondary metabolism. Only a few secondary metabolites have been characterized from the rhodococci (including 3 recently described antibiotics). Twenty-four new Rhodococcus strains were isolated from soils in East Tennessee using acetonitrile enrichment culturing and identified using 16S rRNA analysis. Forty-seven Rhodococcus strains were screened for antibiotic production using a growth inhibition assay. One strain, MTM3W5.2, had 90% similarity to the Rhodococcus opacus 16S rRNA gene sequence and produced a large zone of inhibition against R. erythropolis and a large number of closely related species. The antimicrobial compound produced by MTM3W5.2 had a large MW of 911.5452 Da and acts much like a bacteriocin but no amino acids were detected in this molecule based on TLC analysis.
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Maleki, Saber Haghighati. "Degradation of atrazine by soil consortia : characterization of enzymatically active fractions from cell bound and cell free enrichment cultures." Virtual Press, 1997. http://liblink.bsu.edu/uhtbin/catkey/1048376.

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Soil samples were collected from several corn fields with history of atrazine (herbicide) application. Samples were inoculated into Erlenmeyer flasks each containing 50m1 of minimal basal salts medium amended with 100 ppm atrazine as sole nitrogen source. Flasks were shaken at 200 rpm at ambient temperature and were examined daily for one week for microbial growth and/or disappearance of atrazine. Promising consortia were subcultured for further additional enrichments before characterization of potentially active protein (enzyme)fractions. Proteins from cell-free and cellbound fractions were compared for ability to denature atrazine. Following gel permeation chromatography, isolated protein fractions were examined for atrazinefound in the cell-bound fractions capable degrading degradation. Two were found in the cell-free fractions (approx. Mol. wts. 55kDa and 180kDa) and one (55 kDa) atrazine to hydroxyatrazine. Atrazine and its breakdown products (hydroxyatrazine in particular) were detected via HPLC using C18 and C8 columns with absorbance at 229 nm.
Department of Biology
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Jones, Maiysha D. Pfaender Frederic K. "Effect of incubation conditions on the enrichment of pyrene-degrading bacteria identified by stable isotope probing in a PAH-contaminated soil." Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2006. http://dc.lib.unc.edu/u?/etd,540.

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Thesis (M.S.)--University of North Carolina at Chapel Hill, 2006.
Title from electronic title page (viewed Oct. 10, 2007). "... in partial fulfillment of the requirements for the degree of Master of Science in the Department of Environmental Sciences and Engineering." Discipline: Environmental Sciences and Engineering; Department/School: Public Health.
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Olsson, Per. "Effects of fertilisation on rhizospheric and heterotrophic soil CO2 efflux in boreal Norway spruce stands /." Umeå : Dept. of Forest Ecology, Swedish University of Agricultural Sciences, 2006. http://epsilon.slu.se/10064860.pdf.

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Fatemi, Farrah R. "The Effects of Long-Term Nitrogen Enrichment and Acidification on Soil C, N, and P Dynamics at the Bear Brook Watershed in Maine." Fogler Library, University of Maine, 2011. http://www.library.umaine.edu/theses/pdf/FatemiF2011.pdf.

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Romero, Nilton Carlos de Souza [UNESP]. "Perdas de nutrientes e matéria orgânica por erosão em entressulcos em argissolo com resíduos de cana-de-açúcar." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/88292.

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As reduções das perdas de matéria orgânica e nutrientes por erosão hídrica do solo tornam-se fundamentais, no contexto atual de sistemas de produção sustentáveis, para o aumento do seqüestro de carbono no solo e, consequentemente, diminuir as emissões de gases que contribuem para o efeito estufa como o CO2. Deste modo, o objetivo do presente trabalho foi o de quantificar as concentrações de matéria orgânica (MO) e nutrientes (P, K, Ca e Mg) e, calcular, a taxa de enriquecimento desses elementos no sedimento erodido, em área cultivada com a cultura de cana-de-açúcar, em níveis de cobertura do solo de 0% (CS0), 50% (CS50) e 100% (CS100).As parcelas experimentais foram submetidas à ação de uma chuva simulada com intensidade de 60 mm h-1, durante 65 minutos. Foram feitas análises do sedimento erodido e determinouse, as taxas de enriquecimento do mesmo em MO e nutrientes, valores estes que tiveram as seguintes variações: MO (2,9 a 0,5), P (1,5 a 0,2), K (2,4 a 0,8), Ca (3,5 a 0,5), Mg (3,3 a 0,3) sendo cobertura do solo 0% a 100% respectivamente, mostrando que a cobertura do solo de 100% é eficiente, apresentando todos os valores da taxa de enriquecimento (ER) abaixo de 0,9 e com diferença significativa para com as outras coberturas, 0% e 50%, com exceção do potássio. A cobertura do solo de 100%, em relação a 0%, reduziu a concentração de MO, no sedimento erodido, em 81,9%, a concentração de fósforo em 84,2%, a de potássio em 66,7%, a de cálcio em 84,5%, e reduziu em 89,8% a de magnésio
Reductions in losses of organic matter and nutrients by water erosion become crucial in the current context of sustainable production systems to increase carbon sequestration in soil and thus reduce greenhouse gas emissions that contribute to the greenhouse gases like CO2. Thus the present work had a goal to quantify the concentration of organic material (MO) and nutrients (P,K,Ca, and Mg) into a erosive sediments and also make an calculate according to increasing and enrichment soil’s rates, if there are enrichment of MO and nutrients in a cultivated area of sugar-cane plantation provided with mechanical crop the next levels of soil’s coverage, 0% (CS0), 50% (CS50) and 100% (CS100). The experimental pieces were submited into a simulated raining with intensity of 60 mm h-1, during 65 minutes. After that, the analysis of the sediments, determinated the following variation: MO (2.9 to 0.5), P (1.5 to 0.2), K (2.4 to 0.8), Ca (3.5 to 0.5), Mg (3.3 to 0.3), being the soil’s coverage 0% (CS0) to 100% (CS100), showing that the soil’s coverage of 100% was efficient, presenting all values of enrichment rates (ER) below 0.9 with significant difference comparing to the others coverage, 0% (CS0) and 50% (CS50), except for potassium. The soil’s coverage of 100%, on soil’s coverage of 0%, have reduced the concentration of MO, in the erosive sediments, in 81.9%, the concentration of phosphorus in 84.2%, the concentration of potassium in 66.7%, the concentration of calcium in 84.5%, And reduced in 89.8% the magnesium concentration
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Romero, Nilton Carlos de Souza. "Perdas de nutrientes e matéria orgânica por erosão em entressulcos em argissolo com resíduos de cana-de-açúcar /." Jaboticabal : [s.n.], 2009. http://hdl.handle.net/11449/88292.

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Orientador: Marcílio Vieira Martins Filho
Banca: Jose Marques Junior
Banca: Zigomar Menezes de Souza
Resumo: As reduções das perdas de matéria orgânica e nutrientes por erosão hídrica do solo tornam-se fundamentais, no contexto atual de sistemas de produção sustentáveis, para o aumento do seqüestro de carbono no solo e, consequentemente, diminuir as emissões de gases que contribuem para o efeito estufa como o CO2. Deste modo, o objetivo do presente trabalho foi o de quantificar as concentrações de matéria orgânica (MO) e nutrientes (P, K, Ca e Mg) e, calcular, a taxa de enriquecimento desses elementos no sedimento erodido, em área cultivada com a cultura de cana-de-açúcar, em níveis de cobertura do solo de 0% (CS0), 50% (CS50) e 100% (CS100).As parcelas experimentais foram submetidas à ação de uma chuva simulada com intensidade de 60 mm h-1, durante 65 minutos. Foram feitas análises do sedimento erodido e determinouse, as taxas de enriquecimento do mesmo em MO e nutrientes, valores estes que tiveram as seguintes variações: MO (2,9 a 0,5), P (1,5 a 0,2), K (2,4 a 0,8), Ca (3,5 a 0,5), Mg (3,3 a 0,3) sendo cobertura do solo 0% a 100% respectivamente, mostrando que a cobertura do solo de 100% é eficiente, apresentando todos os valores da taxa de enriquecimento (ER) abaixo de 0,9 e com diferença significativa para com as outras coberturas, 0% e 50%, com exceção do potássio. A cobertura do solo de 100%, em relação a 0%, reduziu a concentração de MO, no sedimento erodido, em 81,9%, a concentração de fósforo em 84,2%, a de potássio em 66,7%, a de cálcio em 84,5%, e reduziu em 89,8% a de magnésio
Abstract: Reductions in losses of organic matter and nutrients by water erosion become crucial in the current context of sustainable production systems to increase carbon sequestration in soil and thus reduce greenhouse gas emissions that contribute to the greenhouse gases like CO2. Thus the present work had a goal to quantify the concentration of organic material (MO) and nutrients (P,K,Ca, and Mg) into a erosive sediments and also make an calculate according to increasing and enrichment soil's rates, if there are enrichment of MO and nutrients in a cultivated area of sugar-cane plantation provided with mechanical crop the next levels of soil's coverage, 0% (CS0), 50% (CS50) and 100% (CS100). The experimental pieces were submited into a simulated raining with intensity of 60 mm h-1, during 65 minutes. After that, the analysis of the sediments, determinated the following variation: MO (2.9 to 0.5), P (1.5 to 0.2), K (2.4 to 0.8), Ca (3.5 to 0.5), Mg (3.3 to 0.3), being the soil's coverage 0% (CS0) to 100% (CS100), showing that the soil's coverage of 100% was efficient, presenting all values of enrichment rates (ER) below 0.9 with significant difference comparing to the others coverage, 0% (CS0) and 50% (CS50), except for potassium. The soil's coverage of 100%, on soil's coverage of 0%, have reduced the concentration of MO, in the erosive sediments, in 81.9%, the concentration of phosphorus in 84.2%, the concentration of potassium in 66.7%, the concentration of calcium in 84.5%, And reduced in 89.8% the magnesium concentration
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Books on the topic "Soil enrichment"

1

MacLean, Jayne T. Liming for soil enrichment, 1979-1986: 287 citations. Beltsville, Md: U.S. Dept. of Agriculture, National Agricultural Library, 1987.

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Genootschap, Koninklijk Nederlands Aardrijkskundig, and Rijksuniversiteit te Utrecht. Faculteit Geowetenschappen., eds. Geochemical soil survey of the Netherlands: Atlas of major and trace elements in topsoil and parent material; assessment of natural and anthropogenic enrichment factors. Utrecht: Koninklijk Nederlands Aardrijkskundig Genootschap, Faculteit Geowetenschappen Universiteit Utrecht, 2006.

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Veer, Grishja van der. Geochemical soil survey of the Netherlands: Atlas of major and trace elements in topsoil and parent material; assessment of natural and anthropogenic enrichment factors. Utrecht: Koninklijk Nederlands Aardrijkskundig Genootschap, 2005.

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Liang, Cheng-Wen. Impact of soil and phosphorus enrichment on Lake Whatcom periphytic algae. 1994.

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Choura, Richard J. Enrichment of the Self and Soul. 1st Books Library, 2000.

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Capturing A Better Life Practical Wisdom For The Mind Inspiration For The Heart Enrichment For The Soul Spirit. Christian Hearts Publishing, 2010.

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Gamboa, Liliana. The influence of mineral substrates and biological surroundings on the enrichment and isolation of pentachlorophenol-degrading bacteria from uncontaminated soils. 2005.

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Book chapters on the topic "Soil enrichment"

1

Yang, Haishui, Michelle Schroeder-Moreno, Bhoopander Giri, and Shuijin Hu. "Arbuscular Mycorrhizal Fungi and Their Responses to Nutrient Enrichment." In Soil Biology, 429–49. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-75910-4_17.

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Twest, Rohan, and Andrew M. Kropinski. "Bacteriophage Enrichment from Water and Soil." In Methods in Molecular Biology, 15–21. Totowa, NJ: Humana Press, 2009. http://dx.doi.org/10.1007/978-1-60327-164-6_2.

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He, X. H., C. Critchley, K. Nara, D. Southworth, and C. S. Bledsoe. "15N Enrichment Methods to Quantify Two-Way Nitrogen Transfer Between Plants Linked by Mychorrhizal Networks." In Soil Biology, 285–91. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-95894-9_17.

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Kloss, M., K. H. Iwannek, I. Fendrik, and E. G. Niemann. "Enrichment of diazotrophic bacteria from rice soil in continuous culture." In Nitrogen Fixation with Non-Legumes, 151–64. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4378-0_12.

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Etesami, Hassan, Arash Hemati, and Hossein Ali Alikhani. "Microbial Bioconversion of Agricultural Wastes for Rural Sanitation and Soil Carbon Enrichment." In Microbial Interventions in Agriculture and Environment, 179–204. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-8383-0_6.

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Larigauderie, A., J. F. Reynolds, and B. R. Strain. "Root response to CO2 enrichment and nitrogen supply in loblolly pine." In Belowground Responses to Rising Atmospheric CO2: Implications for Plants, Soil Biota, and Ecosystem Processes, 21–32. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-017-0851-7_3.

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Rogers, Hugo H., G. Brett Runion, Sagar V. Krupa, and Stephen A. Prior. "Plant Responses to Atmospheric Carbon Dioxide Enrichment: Implications in Root-Soil-Microbe Interactions." In Advances in Carbon Dioxide Effects Research, 1–34. Madison, WI, USA: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, 2015. http://dx.doi.org/10.2134/asaspecpub61.c1.

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Prior, S. A., H. H. Rogers, G. B. Runion, and G. R. Hendrey. "Free-air CO2 enrichment of cotton: vertical and lateral root distribution patterns." In Belowground Responses to Rising Atmospheric CO2: Implications for Plants, Soil Biota, and Ecosystem Processes, 33–44. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-017-0851-7_4.

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Rozema, J. "Plant responses to atmospheric carbon dioxide enrichment: interactions with some soil and atmospheric conditions." In CO2 and biosphere, 173–92. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-1797-5_12.

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Danso, S. K. A., G. Hardarson, and F. Zapata. "Misconceptions and practical problems in the use of 15N soil enrichment techniques for estimating N2 fixation." In Enhancement of Biological Nitrogen Fixation of Common Bean in Latin America, 25–52. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-2100-2_3.

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Conference papers on the topic "Soil enrichment"

1

Karklina, Ilze, and Jelena Stola. "Impact of forest soil enrichment with nitrogen fertilizer on throughfall and soil water chemical properties." In Research for Rural Development 2019 : annual 25th International scientific conference proceedings. Latvia University of Life Sciences and Technologies, 2019. http://dx.doi.org/10.22616/rrd.25.2019.012.

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Hu, Shanhu, Shengxu Luo, Yujie Xiao, Zhang Luo, and Chunlei Fan. "Enrichment of Se in Soil-Crop Systems in the Selenium-rich Region and their Effects for the Enrichment of Heavy Metals." In 5th International Conference on Advanced Design and Manufacturing Engineering. Paris, France: Atlantis Press, 2015. http://dx.doi.org/10.2991/icadme-15.2015.155.

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Huguet, A., C. Zell, S. Coffinet, M. Picard, T. Terosiet, C. Anquetil, J. Lipp, et al. "Influence of Temperature on Soil Thaumarchaeotal Lipids: A Dual Enrichment and Microcosm Approach." In 29th International Meeting on Organic Geochemistry. European Association of Geoscientists & Engineers, 2019. http://dx.doi.org/10.3997/2214-4609.201902987.

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Keenan, Sarah W., and Jennifer M. DeBruyn. "SURFACE AND SUBSURFACE VERTEBRATE DECOMPOSITION RESULT IN PROTRACTED SOIL NITROGEN STABLE ISOTOPIC ENRICHMENT." In 72nd Annual GSA Rocky Mountain Section Meeting - 2020. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020rm-346682.

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Karklina, Ilze, Zaiga Anna Zvaigzne, and Jelena Stola. "Chemical properties of needles as an indicator of nutrient status of fertilized coniferous stands." In Research for Rural Development 2020. Latvia University of Life Sciences and Technologies, 2020. http://dx.doi.org/10.22616/rrd.26.2020.012.

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Enhanced forest growth may respond to demand of woody resources and contribute to the climate change mitigation. Forest soil treatment with fertilizers, as well as drainage and thinning enhance forest growth. The analysis of needles is an established method in forest science to identify the nutrient status in the forest stand and need for forest soil enrichment with fertilizers. The aim of this research is to estimate the efficiency of forest soil enrichment with wood ash and ammonium nitrate in order to eliminate nutrient deficiency in forest stands. Forest soil was enriched with wood ash fertilizer or ammonium nitrate in 2016–2017. The current year needles were collected from fertilized and control plots, from three trees in each plot. The samples were collected in the period 2018–2019. Total nitrogen (g kg-1), calcium (g kg-1), magnesium (g kg-1), and potassium (g kg-1) were analyzed in the collected samples. The chemical properties of collected needles were compared at the individual object level to estimate the impact of fertilizer on forest stand. A statistically significant increase in the concentrations of potassium and phosphorus was detected in some plots treated with wood ash and ammonium nitrate. In addition, a correlation analysis conducted between the variables of chemical properties of needles and soil showed few significant correlations between nutrient content in needles and in soil samples.
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Huang, Guanxing, Jichao Sun, Jihong Jing, Jingtao Liu, Yuxi Zhang, Ying Zhang, Xiaoping Xiang, and Haiwei Cui. "Relationship and Enrichment of Heavy Metals in Soil of Sewage Irrigation Area in Guangdong Province, China." In 2010 4th International Conference on Bioinformatics and Biomedical Engineering (iCBBE). IEEE, 2010. http://dx.doi.org/10.1109/icbbe.2010.5517410.

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Đelic, Gorica, Zoran Simic, Snezana Brankovic, Milan Stankovic, Milica Pavlovic, Tatjana Jakšic, and Predrag Vasic. "POTENCIJAL BIOAKUMULACIJE I TRANSLOKACIJE METALA KOD VRSTE ACHILLEA MILLEFOLIUM SA RAZLICITIH LOKALITETA." In XXVI savetovanje o biotehnologiji sa međunarodnim učešćem. University of Kragujevac, Faculty of Agronomy, 2021. http://dx.doi.org/10.46793/sbt26.319dj.

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Achillea millefolium L. has a great value as medicinal plant. The aim of the research is to determine the uptake potential for heavy metals and the intraspecial difference between unique species of A. millefolium from different localities based on the heavy metals uptake, their distribution in plant organs and enrichment factors. The results showed that plants growing on soil rich in heavy metals (tailings) absorb significantly higher amounts of metals compared to plants from the Ovčar-Kablar gorge (non-contaminated soil).
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Plekhanova, Liudmila. "SOILS OF SMALL ARCHAEOLOGICAL SETTLEMENTS IN THE STEPPE ZONE AS A RESULT OF BRONZE AGE ANTHROPOGENIC IMPACT." In GEOLINKS Conference Proceedings. Saima Consult Ltd, 2021. http://dx.doi.org/10.32008/geolinks2021/b1/v3/43.

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"The contemporary direction of natural pedogenesis/soil science is ancient anthropogenic impact and climate fluctuations changes. A large number of settlements in the river valleys are unique objects with a long history of development and modern soil cover formation. We studied the soil between the dwellings for a small settlement Zarya of the Bronze Age. The settlement was part of the economic zone of cattle breeding (horses and cows and sheep) of the large early Bronze Age fortified city Sarym-Sakla, one of the country's Proto-Iranian Cities of the Trans-Ural Plateau. The activity of ancient societies changed the terrestrial ecosystem functioning at macro and microscales. Increased heterogeneity of microrelief forms led to the diversity of soil cover. We found the unusual soil types on microelevations and microdepressions. The enrichment of the cultural layer with phosphorus compounds was revealed, and the hypothesis of the formation of a ""reverse"" ratio of chernozems-solonetzes of the soil cover of the low above-floodplain terrace as a consequence of several stages of ancient anthropogenic pressure and climatic aridization was confirmed in this area. We focused on the determination of organic carbon content, magnetic susceptibility, salt composition, cation exchange capacity, and the distribution of mobile phosphates along the soil profile as possible indicators of ancient anthropogenic influence. The degree of soil properties changes during the anthropogenic impact is commensurate with their transformation in the natural evolution of centuries and even several millennia. Past anthropogenic changes leave a mark in the history of the development of the soil cover predetermining the modern danger of the degradation phenomena. Moreover, we draw parallels in the history of ecosystems formation and outlined tasks for further research."
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Gruhl, Daniel, Kevin Haas, Jan Pieper, Christine Robson, and Tony Stuart. "Information Enrichment Service Systems." In 2007 IEEE International Conference on Service Operations and Logistics, and Informatics. IEEE, 2007. http://dx.doi.org/10.1109/soli.2007.4383941.

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Bordean, Despina-Maria. "ENRICHMENT OF SOILS: PLAQUE OR AID?" In 13th SGEM GeoConference on ECOLOGY, ECONOMICS, EDUCATION AND LEGISLATION. Stef92 Technology, 2013. http://dx.doi.org/10.5593/sgem2013/be5.v1/s20.048.

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Reports on the topic "Soil enrichment"

1

Smith, D. H. Vegetation and soil sampling for detection of enrichment facilities. Office of Scientific and Technical Information (OSTI), June 1994. http://dx.doi.org/10.2172/10159242.

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Keller, Jason, Scott Bridgham, and Qianlai Zhuang. UNDERSTANDING MECHANISTIC CONTROLS OF HETEROTROPHIC CO2 AND CH4 FLUXES IN A PEATLAND WITH DEEP SOIL WARMING AND ATMOSPHERIC CO2 ENRICHMENT. Office of Scientific and Technical Information (OSTI), April 2021. http://dx.doi.org/10.2172/1778095.

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Bridgham, Scott D., Jason K. Keller, and Qianlai Zhuang. Understanding the Mechanisms Underlying Heterotrophic CO2 and CH4 Fluxes in a Peatland with Deep Soil Warming and Atmospheric CO2 Enrichment. Office of Scientific and Technical Information (OSTI), September 2016. http://dx.doi.org/10.2172/1324457.

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S. W. Leavitt, A. D. Matthias, T. L. Thompson, and R. A. Rauschkolb. Soil carbon storage and N{sub 2}O emissions from wheat agroecosystems as affected by free-air CO{sub 2} enrichment (FACE) and nitrogen treatments. Final Report - February 12, 1999. Office of Scientific and Technical Information (OSTI), February 1999. http://dx.doi.org/10.2172/765300.

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Leavitt, S. W., A. Matthias, and T. L. Thompson. Soil Carbon Storage and N{sub 2}O Emissions from Wheat Agroecosystems as Affected by Free-Air CO{sub 2} Enrichment (FACE) and Nitrogen Treatments. Annual Progress Report - Year 1: August 1, 1996 to July 31, 1997 [Final Report]. Office of Scientific and Technical Information (OSTI), February 1999. http://dx.doi.org/10.2172/761932.

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