Optimal organic carbon values for soil structure quality of arable soils. Does clay content matter?

Johannes, Alice; Matter, Adrien; Schulin, Rainer; Weisskopf, Peter; Baveye, Philippe C.; Boivin, Pascal

doi:10.1016/j.geoderma.2017.04.021

Cited by 128 publications

(128 citation statements)

References 24 publications

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“…Inspired by Johannes et al (2017) we found increased SOC/clay ratios compared to agriculture sites, but this relationship must be further investigated for other non-arable soils.…”

Section: Effect Of Soil Disturbance On Urban Garden Soilsmentioning

confidence: 82%

“…The ratio of SOC to clay was calculated as an indicator of structural soil quality (Johannes et al, 2017). Further eco-physiological indices of soil quality were calculated using the ratio of C mic to SOC (microbial quotient) as an indicator of SOM quality for microbes and the metabolic quotient (qCO 2 ) calculated as the ratio of basal respiration rate to C mic , which describes the substrate mineralized per unit of microbial biomass carbon (Anderson, 2003).…”

Section: Soil Quality Indicesmentioning

confidence: 99%

“…The structural soil quality indicator from Johannes et al (2017) revealed that 85% of the gardens ( Figure S2) had a SOC/clay ratio >1:13 and 4% were below the 1:10 threshold.…”

Section: Soil Quality Indicesmentioning

confidence: 99%

See 2 more Smart Citations

A Gardener's Influence on Urban Soil Quality

Tresch

Moretti

Bayon

et al. 2018

Front. Environ. Sci.

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“…Inspired by Johannes et al (2017) we found increased SOC/clay ratios compared to agriculture sites, but this relationship must be further investigated for other non-arable soils.…”

Section: Effect Of Soil Disturbance On Urban Garden Soilsmentioning

confidence: 82%

Section: Soil Quality Indicesmentioning

confidence: 99%

See 1 more Smart Citation

A Gardener's Influence on Urban Soil Quality

Tresch

Moretti

Bayon

et al. 2018

Front. Environ. Sci.

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“…The OC:clay ratio was proposed as a pertinent criterion when considering structural quality of soils (Johannes, Matter, et al., ), due to the contribution of organic carbon (OC) to resistance and resilience of soil structure. Our results are contradicting with the criterion of Johannes, Matter, et al.…”

Section: Resultsmentioning

confidence: 99%

Evaluating the long‐term effects of tillage systems on soil structural quality using visual assessment and classical methods

Çeli̇k

Günal

Acar

et al. 2019

Soil Use and Management

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Current agricultural practices and their impacts on the sustainability of crop production can be evaluated by simple and reliable soil structure assessment tools. The study was conducted to determine the effects of long‐term (2006–2017) tillage systems on structural quality of a clayey soil using the visual evaluation of soil structure (VESS) and classical field and laboratory measurements. A field experiment with seven tillage systems, representing both traditional and conservation tillage methods, was conducted on a clayey soil in the Cukurova region, Turkey. Soil samples from 0–10, 10–20 and 20–25 cm depths were analysed for mean weight diameter (MWD), porosity and organic carbon. Penetration resistance (PR) was determined in each treatment plot. The VESS scores (<2) of upper 0–5 cm indicated a good structural quality for all tillage systems. The VESS scores were positively related to PR and MWD and negatively to macroporosity (MaP) and total porosity. In reduced and no‐till systems, poorer soil structures were observed in subsurface layers where firm platy and angular blocky structures were defined. Mean VESS score (3.29) in 20–25 cm depth where PR was 3.01 MPa under no‐till indicated a deterioration of soil structural quality; thus, immediate physical interventions would be needed. Lower VESS scores and PR values under strategic tillage which was created by ploughing half of no‐till plots in November 2015 indicated successful correction of compaction caused by long‐term no‐till. The results suggest that the VESS approach is sensitive and useful in distinguishing compacted layers within the topsoil.

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“…The shrinkage characteristics of soil could contain information on both porosity and structural stability (Schäffer et al, 2013). Shrinkage curves (soil volume as a function of soil moisture content; Braudeau et al, 1999) have therefore been used to assess the structural quality of soils (Johannes et al, 2017) and to quantify soil management and compaction effects on soil structure (Schäffer et al, 2008;. Sou/Dakouré et al (2013) used shrinkage curves to assess the impact of irrigation water containing different concentrations of salts on the physical quality of a sandy loam soil in Burkina Faso.…”

Section: Introductionmentioning

confidence: 99%

Impact of monovalent cations on soil structure. Part II. Results of two Swiss soils

Farahani¹,

Emami²,

Keller³

2018

International Agrophysics

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A b s t r a c t. In this study, we investigated the impact of adding solutions with different potassium and sodium concentrations on dispersible clay, water retention characteristics, air permeability, and soil shrinkage behaviour using two agricultural soils from Switzerland with different clay content but similar organic carbon to clay ratio. Three different solutions (including only Na, only K, and the combination of both) were added to soil samples at three different cation ratio of soil structural stability levels, and the soil samples were incubated for one month. Our findings showed that the amount of readily dispersible clay increased with increasing Na concentrations and with increasing cation ratio of soil structural stability. The treatment with the maximum Na concentration resulted in the highest water retention and in the lowest shrinkage capacity. This was was associated with high amounts of readily dispersible clay. Air permeability generally increased during incubation due to moderate wetting and drying cycles, but the increase was negatively correlated with readily dispersible clay. Readily dispersible clay decreased with increasing K, while readily dispersible clay increased with increasing K in Iranian soil (Part I of our study). This can be attributed to the different clay mineralogy of the studied soils (muscovite in Part I and illite in Part II).

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Optimal organic carbon values for soil structure quality of arable soils. Does clay content matter?

Cited by 128 publications

References 24 publications

A Gardener's Influence on Urban Soil Quality

A Gardener's Influence on Urban Soil Quality

Evaluating the long‐term effects of tillage systems on soil structural quality using visual assessment and classical methods

Impact of monovalent cations on soil structure. Part II. Results of two Swiss soils

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