Tillage and fertilization practices affect soil aggregate stability in a Humic Cambisol of Northwest France

Bottinelli, Nicolas; Angers, Denis A.; Hallaire, Vincent; Michot, Didier; Guillou, Cédric Le; Cluzeau, Daniel; Heddadj, Djilali; Menasseri‐Aubry, Safya

doi:10.1016/j.still.2017.02.008

Cited by 118 publications

(67 citation statements)

References 27 publications

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“…Aggregate stability was expressed by mean weight diameter (MWD) as follows (Bottinelli et al ., ):

\begin{matrix} W_{i} & = \frac{m_{i}}{M}, \\ normalMWD & = \sum_{i = 1}^{n} ((), \overset{x_{i}}{true} w_{i}), \end{matrix}

where W i is the percentage mass fraction of aggregates remaining on the i th sieve, m i is the mass of aggregates remaining on i th sieve, M is the total mass of each soil sample,

{\overset{x}{true}}_{i}

is the average aperture of the i th and ( i + 1)th mesh (mm) and n is the number of sieves.…”

Section: Methodsmentioning

confidence: 99%

“…Aggregate stability was expressed by mean weight diameter (MWD) as follows (Bottinelli et al, 2017):…”

Section: Measurements Of Soil Aggregate Stability and Soil Characterimentioning

confidence: 99%

“…A mechanistic understanding of soil carbon pools can be achieved by research on litter production and decomposition (Moser et al, 2014), soil respiration and microbial composition and activity (Ren et al, 2017). However, it rarely focuses on soil aggregates, which play a fundamental role in SOC sequestration (Bottinelli et al, 2017). Soil aggregates protect SOC from microbial decomposition and physical degradation by reducing the accessibility of organic compounds to microbes, extracellular enzymes and oxygen (Amezketa, 1999).…”

Section: Introductionmentioning

confidence: 99%

“…Aggregate size, distribution and stability are affected by land use, tillage regime (Bottinelli et al, 2017) and external amendments (Fungo et al, 2017). In general, aggregate stability is positively related to SOC content (Wang et al, 2016) because organic matter is the most common organic binding agent (Amezketa, 1999).…”

Section: Introductionmentioning

confidence: 99%

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Reduction in throughfall reduces soil aggregate stability in two subtropical plantations

Yang

Liu

Wang

et al. 2018

European J Soil Science

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Summary Climate change has altered global precipitation regimes in terms of intensity and frequency of drought stress and, consequently, it is likely to affect soil moisture and soil aggregation. However, we know little about the effects of drought on soil aggregate size, distribution and stability, and how that affects carbon sequestration. A drought manipulation experiment was conducted by throughfall exclusion treatment (TET) of 50% in two planted forests (Pinus massoniana Lamb. and Castanopsis hystrix A.DC.) in subtropical China. The aim was to investigate the effects of a reduction in throughfall on aggregate size, distribution and stability. The results from the 4‐year experiment show that the TET affected soil moisture content significantly (with 14.5 and 20.4% decreases in the P. massoniana and C. hystrix plantations, respectively) compared with the control. Soil temperature at 0–5‐cm soil depth and soil texture were not affected significantly. Soil porosity in the TET plots was greater than that of the control, whereas soil bulk density and free Al oxide content were less. The mass fractions of macroaggregates (> 0.25 mm) and mean weight diameter (MWD) of aggregates, an indicator of aggregate stability, decreased in the TET compared with the control. Variation in aggregate size, distribution and stability can be caused by Fe and Al oxides, soil texture, bulk density and porosity. Our results indicated that TET reduced soil aggregate stability in subtropical plantations because of a decrease in free Al oxide and an increase in porosity. Slaking effects from variation in soil moisture were also possible for the decreased MWD. This study suggests disturbance of forest soils should be minimized in the context of a decline in precipitation. Highlights Size, distribution and stability of forest soil aggregates were evaluated under throughfall exclusion. TET reduced free Al oxide content but increased soil porosity, leading to breakdown of macroaggregates. Soil aggregate stability was reduced by TET. Fe and Al oxides and soil texture contributed more than SOC to aggregate size and stability.

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“…Aggregate stability was expressed by mean weight diameter (MWD) as follows (Bottinelli et al ., ):

\begin{matrix} W_{i} & = \frac{m_{i}}{M}, \\ normalMWD & = \sum_{i = 1}^{n} ((), \overset{x_{i}}{true} w_{i}), \end{matrix}

where W i is the percentage mass fraction of aggregates remaining on the i th sieve, m i is the mass of aggregates remaining on i th sieve, M is the total mass of each soil sample,

{\overset{x}{true}}_{i}

is the average aperture of the i th and ( i + 1)th mesh (mm) and n is the number of sieves.…”

Section: Methodsmentioning

confidence: 99%

“…Aggregate stability was expressed by mean weight diameter (MWD) as follows (Bottinelli et al, 2017):…”

Section: Measurements Of Soil Aggregate Stability and Soil Characterimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Reduction in throughfall reduces soil aggregate stability in two subtropical plantations

Yang

Liu

Wang

et al. 2018

European J Soil Science

View full text Add to dashboard Cite

show abstract

“…It is characterized by the retention of at least 30% of crop residues on the soil surface and often achieved through low-impact tillage techniques such as no-till or strip till [9]. These residues and reduced soil disturbance help prevent erosion [2], improve water retention and drainage [10,11], and foster the quantity and quality of organic matter [4,12,13]. After emerging in response to the 1930s Dust Bowl in the United States (US), large-scale adoption began in the 1980s and 1990s following the development of modern herbicides and specialized technology [1,14,15].…”

Section: Introductionmentioning

confidence: 99%

Satellites reveal a small positive yield effect from conservation tillage across the US Corn Belt

Deines

Wang

Lobell

2019

Environ. Res. Lett.

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Conservation tillage is a primary tenet of conservation agriculture aimed at restoring and maintaining soil health for long-term crop productivity. Because soil degradation typically operates on century timescales, farmer adoption is influenced by near-term yield impacts and profitability. Although numerous localized field trials have examined the yield impacts of conservation tillage, their results are mixed and often unrepresentative of real-world conditions. Here, we applied a machine-learning causal inference approach to satellite-derived datasets of tillage practices and crop yields spanning the US Corn Belt from 2005 to 2017 to assess on-the-ground yield impacts at field-level resolution across thousands of fields. We found an average 3.3% and 0.74% yield increase for maize and soybeans, respectively, for fields with long-term conservation tillage. This effect was diminished in fields that only recently converted to conservation tillage. We also found significant variability in these effects, and we identified soil and weather characteristics that mediate the direction and magnitude of yield responses. This work supports soil conservation practices by demonstrating they can be used with minimal and typically positive yield impacts.

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Soil–air phase characteristics: Response to texture, density, and land use in Greenland and Denmark

Pesch

Weber

Jonge

et al. 2021

Soil Science Soc of Amer J

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Soil aeration is a key parameter for sustainable and productive agriculture. The intensification of agricultural activity in Greenland involves land use (LU) and LU change, affecting the soil-air phase. The combined effects of natural compaction (bulk density, ρ b ), texture (texture uniformity index; TUI), and LU on the soil-air phase of subarctic soils are not well known. This study aims to identify and compare the main drivers for air-filled porosity (ε) and soil-structure changes within and across sites in Greenland and Denmark. We analyzed comprehensive data sets of ε, relative gas diffusivity D p /D o ), and air-permeability (k a ) measured on intact soil samples from South Greenland (pasture) and Denmark (cultivated, urban, and forest). The mechanical robustness of the air phase was evaluated by linear models of ε as a function of ρ b (H-model). The ratio of k a to D p /D o served as a soil-structure index (Ω); the latter significantly correlated to TUI. The Greenlandic pasture soils did not show signs of well-developed soil structure (low Ω-values), whereas low H-values suggested the soils were mechanically robust compared to similar-textured cultivated soils. The soil-air characteristic curve (ε vs. pF) was parameterized, and the moisture control parameter was accurately predicted by TUI and LU (R 2 = .95). Overall, the ρ b was found to control the air-phase functions within a field. However, considering changes in ε-levels across different fields, texture, LU, and other environmental factors became statistically more relevant than ρ b . A modeled response surface for changes in ε with soil conditions may, in perspective, be useful for better-predicting gas transport in soil, both within and across fields.

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Tillage and fertilization practices affect soil aggregate stability in a Humic Cambisol of Northwest France

Cited by 118 publications

References 27 publications

Reduction in throughfall reduces soil aggregate stability in two subtropical plantations

Reduction in throughfall reduces soil aggregate stability in two subtropical plantations

Satellites reveal a small positive yield effect from conservation tillage across the US Corn Belt

Soil–air phase characteristics: Response to texture, density, and land use in Greenland and Denmark

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