Influence of tillage practice on carbon sequestration is scale-dependent

Bergstrom, D. W.; Monreal, Carlos M.; Étamé, Jacques

doi:10.4141/s00-017

Cited by 23 publications

(10 citation statements)

References 30 publications

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“…Some researchers find that NT affects only the distribution of carbon in the soil rather than increasing the actual amount sequestered (Angers et al, 1995;Potter et al, 1998;Wanniarachchi et al, 1999). Many scientists have found no significant difference between the mass of carbon observed in NT soils and that found in intensively/conventionally tilled soils (Doran, 1980;Dick, 1983;Salinas-Garcia et al, 1997;Angers et al, 1997;Bergstrom et al, 2001). Most studies find a significant difference only in the top 5-15 cm, in some cases followed by an opposite trend in the next 15 cm (Dick, 1983;Yang and Wander, 1999;Yang and Kay, 2001).…”

Section: Carbon Accumulation In Agricultural Soils: the Effect Of Tilmentioning

confidence: 99%

Creating Carbon Offsets in Agriculture through No-Till Cultivation: A Meta-Analysis of Costs and Carbon Benefits

et al. 2005

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Abstract. Carbon terrestrial sinks are often seen as a low-cost alternative to fuel switching and reduced fossil fuel use for lowering atmospheric CO 2 . To determine whether this is true for agriculture, one meta-regression analysis (52 studies, 536 observations) examines the costs of switching from conventional tillage to no-till, while another (51 studies, 374 observations) compares carbon accumulation under the two practices. Costs per ton of carbon uptake are determined by combining the two results. The viability of agricultural carbon sinks is found to vary by region and crop, with no-till representing a low-cost option in some regions (costs of less than $10 per tC), but a high-cost option in others (costs of 100-$400 per tC). A particularly important finding is that no-till cultivation may store no carbon at all if measurements are taken at sufficient depth. In some circumstances no-till cultivation may yield a "triple dividend" of carbon storage, increased returns and reduced soil erosion, but in many others creating carbon offset credits in agricultural soils is not cost effective because reduced tillage practices store little or no carbon.

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Section: Carbon Accumulation In Agricultural Soils: the Effect Of Tilmentioning

confidence: 99%

Creating Carbon Offsets in Agriculture through No-Till Cultivation: A Meta-Analysis of Costs and Carbon Benefits

et al. 2005

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“…30% of cultivated soils in Manitoba, and similar landscapes in Saskatchewan and Alberta. Management practices in each field were described by Bergstrom et al (2001). Soil cores 5.0 cm in diameter and approx.…”

Section: Site Description and Sampling Schemementioning

confidence: 99%

“…This fact will make accounting of changes in OC stocks at a field scale difficult, if focussed on management alone. Because topography was a major determinant of OC stocks, soil series by themselves or grouped by drainage class provided a tentative framework for stratifying the sampling site for the evaluation of effects of tillage practice on OC mass (Bergstrom et al 2001). Alternatively, if, in the present study, information about spatial dependence is ignored and conventional statistical methods, which assume independent samples were applied, then within each field samples should be selected at positions separated by distances greater than the range (120-130 m).…”

Section: Implications For Evaluation Of Management Practicesmentioning

confidence: 99%

“…Bergstrom, D. W., Monreal, C. M. et St. Jacques, E. 2001. Dépendance spatiale de la masse de carbone organique dans le sol et rapports avec la série de sols et la topographie.…”

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“…To this end, geostatistics was used to detect a scale-dependent pattern in OC mass (Gardner 1998). The results of this analysis provided an objective framework for subsequent evaluation of the effect of tillage practice on OC stocks (Bergstrom et al 2001).…”

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Spatial dependence of soil organic carbon mass and its relationship to soil series and topography

Bergstrom¹,

Monreal²,

Étamé³

2001

Can. J. Soil. Sci.

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. 2001. Spatial dependence of soil organic carbon mass and its relationship to soil series and topography. Can. J. Soil Sci. 81: 53-62. Concern about the global increase in atmospheric CO 2 has focussed attention on C sequestration in soil and the influence of management practices on soil organic C (OC) stocks. Evaluation of management practices is required at scales comparable to farm management units, which encompass heterogeneous soils and different landforms. The objectives of this study were to describe the spatial dependence of soil OC mass in two adjacent fields with contrasting tillage practices on Black Chernozemic soils using geostatistics and relate it to topographic features and soil series. Mass of OC was measured for a surface layer, the A horizon and solum. The spatial dependence of OC mass was at a scale commensurate with topographic variation. Spatial analysis generally corroborated description of the sampling site by soil series, which represented differences in drainage as influenced by slope-position and redistribution of water across the landscape. Soil series alone or grouped by drainage class, therefore, provided a framework by which to stratify the site for evaluation of effects of tillage practice on OC mass and extrapolation of results to comparable sites within the same landscape. Les inquiétudes que soulève l'accumulation de CO 2 dans l'atmosphère ont fait en sorte qu'on s'intéresse de plus en plus à la séquestration du C dans le sol et aux conséquences des pratiques d'aménagement sur les réserves de carbone organique (CO) dans le sol. Il faut évaluer les méthodes de gestion à une échelle comparable à celle des exploitations agricoles, en combinant des sols hétérogènes et différents reliefs. Dans le cadre de cette étude, on a recouru à la géostatistique pour décrire la dépendance spatiale de la masse de CO dans le Tchernozem noir de deux champs travaillés de manière contrastante et on a associé les résultats obtenus à la topographie et à la série de sols. La quantité de CO a été mesurée dans la couche de surface, l'horizon A et le solum. La masse de CO varie dans l'espace à une échelle qui correspond à l'évolution du relief. En général, l'analyse spatiale corrobore la description obtenue au site d'échantillonnage pour la série de sols, qui traduit les fluctuations de drainage résultant de la déclivité et de l'emplacement ainsi que de la redistribution de l'eau sur le relief. Prise globalement ou divisée par classe de drainage, la série de sols offre donc un cadre permettant de stratifier le site pour l'estimation des effets du travail du sol sur la masse de CO et d'extrapoler les résultats à des endroits analogues présentant le même relief.

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High organic carbon stock in a karstic soil of the Middle-European Forest Province persists after centuries-long agroforestry management

Ahmed¹,

Pichler

Homolák

et al. 2012

Eur J Forest Res

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Little is known on soil organic carbon (SOC) stocks in karst areas worldwide, although many of them have seen long-term application of agroforestry systems with a potential for carbon sequestration. Therefore, our study aimed to assess landscape-level SOC concentration and stock in the Silica Plateau, a part of the Slovak Karst Biosphere Reserve located in the Western Carpathians (Slovakia) with a centuries-long agroforestry record. The most represented local soil units are Chromi-Rendzic Leptosols and Chromic Cambisols with clayey loam texture, C/N ratio 9-12, and pH H 2 O 6.6-6.2 in their organo-mineral surface horizons. Mull surface humus form prevails under mixed forest stands dominated by hornbeam (Carpinus betulus L.), oak (Quercus petraea L.), and beech (Fagus sylvatica L.). A total of 2,700 soil samples were collected from 150 soil pits. Both SOC concentrations and stocks were determined for the 0-60 cm mineral soil layer. Soil stoniness was accounted for by means of electrical resistivity tomography. According to the analysis of covariance, cropland SOC concentration (0.026 g g -1 ) is significantly lower compared to forestland (0.040 g g -1 ) and pastureland (0.041 g g -1 ) (P \ 0.01). During the period of 130 years after forest clearing, cropland SOC stock has been reduced at an exponential decay rate of ca 0.002 year -1 , while the SOC stock in pastureland has increased following land use change from cropland by approximately 30% during the same period of time. Irrespective of land use history, overall SOC stock is high reaching on average 207.4 Mg ha -1 , out of which 66% are stored within 0-30 cm and 34% within 30-60 cm soil layers.

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Influence of tillage practice on carbon sequestration is scale-dependent

Cited by 23 publications

References 30 publications

Creating Carbon Offsets in Agriculture through No-Till Cultivation: A Meta-Analysis of Costs and Carbon Benefits

Creating Carbon Offsets in Agriculture through No-Till Cultivation: A Meta-Analysis of Costs and Carbon Benefits

Spatial dependence of soil organic carbon mass and its relationship to soil series and topography

High organic carbon stock in a karstic soil of the Middle-European Forest Province persists after centuries-long agroforestry management

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