Changes in balk density and porosity of chernozem typical under different cultivation systems

Yevtushenko, T. V.; Tonkha, Oksana; Pikovskaa, O.V.

doi:10.1016/j.aasci.2016.09.005

Cited by 4 publications

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“…The relative density of the organoclays also decreases with the length and number of the long alkyl chains of the surfactants. According to Yevtushenko et al, there is an inverse relationship between porosity and the relative density of soil, which means that the decrease of the relative density causes an increase in soil porosity [39]. Although porosity measurements were not carried out, the decrease of the relative density of the organoclays could indicate that their porosities are higher than the ones of the corresponding untreated samples [39].…”

Section: Relative Density Measurementsmentioning

confidence: 99%

“…According to Yevtushenko et al, there is an inverse relationship between porosity and the relative density of soil, which means that the decrease of the relative density causes an increase in soil porosity [39]. Although porosity measurements were not carried out, the decrease of the relative density of the organoclays could indicate that their porosities are higher than the ones of the corresponding untreated samples [39]. The swelling and increased hydrophobicity is certainly the reason for the difficulty to grind the organoclays with high surfactant loading level.…”

Section: Relative Density Measurementsmentioning

confidence: 99%

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Solid-state synthesis and physico-chemical characterization of modified smectites using natural clays from Burkina Faso

Garikoé¹,

Sorgho²,

Guel³

et al. 2021

Bull. Chem. Soc. Eth.

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Solid-state intercalation was applied to prepare organo-smectites using cationic surfactants and natural clays containing smectite at various surfactant/smectite ratios. The surfactants enter the interlayers of smectites causing a swelling of the clays. The used clays were collected in Siétougou and Diabari villages located in the eastern part of Burkina Faso. The solid-state intercalation was successful for all four surfactants applied, n-dodecyltrimethylammonium bromide, (n-C12H25(CH3)3NBr), n-tetradecyltrimethylammonium bromide, (n-C14H29(CH3)3NBr), n-hexadecyltrimethylammonium bromide (n-C16H33(CH3)3NBr) and di-n-dodecyldimethylammonium bromide ((n-C12H25)2(CH3)2NBr) at different levels of the cation exchange capacity (CEC). The synthesized organo-smectites were characterized regarding relative density, structural and textural properties. XRPD data showed a systematic increase of the basal spacing of the unit cell of the smectite up to >38 Å at 2.0-CEC loading of the surfactant. This increase indicates that the surfactants penetrated into the smectite interlayers with the surfactants being arranged parallel to the layers at low concentrations and almost perpendicular at high ones. FTIR spectra of the organo-smectites showed a decrease in the intensities of the water bands at around 1630 cm-1 and 3400 cm-1, and new specific bands close to 2920 cm-1 and 2850 cm-1 were assigned to the asymmetric and symmetric stretching of CH2 groups of the surfactants, respectively. KEY WORDS: Smectite, Organo-smectite, Surfactant, Intercalation Bull. Chem. Soc. Ethiop. 2021, 35(1), 43-59. DOI: https://dx.doi.org/10.4314/bcse.v35i1.4

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Section: Relative Density Measurementsmentioning

confidence: 99%

Section: Relative Density Measurementsmentioning

confidence: 99%

Solid-state synthesis and physico-chemical characterization of modified smectites using natural clays from Burkina Faso

Garikoé¹,

Sorgho²,

Guel³

et al. 2021

Bull. Chem. Soc. Eth.

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“…4b). Other researchers (Yevtushenko et al, 2016) have found that aeration porosity was above 20% regardless of tillage technology. In our case, SC1 had the lowest aeration porosity of 12.08%, while in other SCs it was around 20%.…”

Section: Soil Aeration Porositymentioning

confidence: 80%

Analysis of changes in soil physical properties and CO₂ emissions under the influence of biopreparations of different composition

Buragienė

Šarauskis

Adamavičienė

et al. 2023

Preprint

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Abstract. The introduction of innovative technologies in agriculture is key not only to improving the efficiency of agricultural production, crop yields, and quality but also to balancing energy use and preserving a cleaner environment. Biopreparations are environmentally friendly means of restoring the vitality of the soil on which plants can thrive. Biopreparations have an impact on soil health and alter greenhouse gas emissions. The aim of this work was to investigate the effects of different biopreparation formulations on soil physical properties and CO2 emissions from the soil by establishing correlations. The experimental studies were carried out over three years, and each spring, after the resumption of winter crops, the soil surface was sprayed with biopreparations of different properties or mixtures of biopreparations, under 7 scenarios, with one scenario left as a control. Soil porosity, temperature, and CO2 emissions from the soil were measured regularly every month from April to August. The application of the biopreparations showed a cumulative effect on the soil properties. In the third year of the study, the total porosity of the soil was higher in all scenarios compared to the control, ranging between 51 % and 74 %. The aeration porosity of the soil was also higher in all years of the study than in the control, although no significant differences were obtained. The results of the studies on CO2 emissions from the soil showed that in the first year, the application of the biopreparations increases emissions compared to the control. However, when assessing the cumulative effect of the biopreparations on soil respiration intensity, it was found that in the third year, most of the biopreparations led to a reduction in CO2 emissions compared to the control. The lowest emissions were achieved with the biopreparations consisting of essential oils of plants, 40 species of various herbs extracts, marine algae extracts, Azospirillum sp., Frateuria aurentia, Bacillus megaterium, mineral oils, Azotobacter vinelandi, humic acid, gibberellic acid, sodium molybdate, azototbacter chroococcum, azospirillum brasilense, etc.

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“…Studies indicate that β should be higher than or equal to 0.1 m 3 /m 3 or 10% (Erickson, 1982;Reichardt and Timm, 2004). In order not to hamper the normal functioning of the plant root system, Yevtushenko et al (2016) consider that β should not be below 0.15 m 3 /m 3 or 15% in the surface layer.…”

Section: Resultsmentioning

confidence: 99%

Influence of the AquaCrop soil module on the estimation of soybean and maize crop yield in the State of Parana, Brazil

et al. 2020

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The values of the physical-water attributes of soils for use in agricultural simulation models are usually obtained using difficult and time-consuming methods. The objective of this study was to analyze the performance of the AquaCrop model to estimate soybean and maize crop productivity in the region of Campos Gerais (Brazil), with the option of including soil physical-water attributes in the model. Real crop productivities and input data (soil, climate, crop and soil management) were obtained from experimental stations of the ABC Foundation for the crop years 2006 to 2014. Sixty-four yield simulations were performed for soybean (four municipalities) and 42 for maize (three municipalities), evaluating input soil data scenarios of AquaCrop as follows: i) all soil physical-water attributes were measured (standard) and ii) the attributes were measured only using textural classification of the area (alternative). Real and simulated yields were verified by simple linear regression analyses and statistical indices (r, d, c). The standard scenario yielded performances between very good and excellent (0.75<c≤1.0) for soybean and between bad and excellent (0.40<c≤1.0) for maize. The alternative scenario was more variable, with performances between terrible and excellent (0.0<c≤1.0) for soybean and terrible and medium (0.0<c≤0.65) for maize. Using only the soil texture classification in AquaCrop indicated an easier way to estimate crop yields, but low performances may restrict estimates of soybean and maize yields in Campos Gerais.

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Changes in balk density and porosity of chernozem typical under different cultivation systems

Cited by 4 publications

References 0 publications

Solid-state synthesis and physico-chemical characterization of modified smectites using natural clays from Burkina Faso

Solid-state synthesis and physico-chemical characterization of modified smectites using natural clays from Burkina Faso

Analysis of changes in soil physical properties and CO₂ emissions under the influence of biopreparations of different composition

Influence of the AquaCrop soil module on the estimation of soybean and maize crop yield in the State of Parana, Brazil

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Changes in balk density and porosity of chernozem typical under different cultivation systems

Cited by 4 publications

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Solid-state synthesis and physico-chemical characterization of modified smectites using natural clays from Burkina Faso

Solid-state synthesis and physico-chemical characterization of modified smectites using natural clays from Burkina Faso

Analysis of changes in soil physical properties and CO2 emissions under the influence of biopreparations of different composition

Influence of the AquaCrop soil module on the estimation of soybean and maize crop yield in the State of Parana, Brazil

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Analysis of changes in soil physical properties and CO₂ emissions under the influence of biopreparations of different composition