Evaluation Des Critères De Différenciation Pour La Classification De 92 Matériaux Tourbeux Du Québec Et De L’ontario

Lévesque, M.; Dinel, H.; Marcoux, Robert

doi:10.4141/cjss80-053

Cited by 8 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The measured bulk densities recorded for the three samples A, B and C (0.135, 0.178 and 0.142 g cm -3 , respectively) are consistent with those of highly decomposed peat materials (Benscoter et al, 2011;Kurnain and Hayati, 2016). The measured pyrophosphate indices recorded for samples A, B and C (96.1, 78.9 and 81.2, respectively) are also consistent with highly decomposed peat materials which may be classified as asapric peat (pyrophosphate index >30) according to Levesque et al (1980). The C/N ratio recorded for samples A, B and C (12.1, 16.6 and 15.0, respectively) confirms that the three peat samples present a high degree of decomposition (Comont et al, 2006).…”

Section: Resultssupporting

confidence: 68%

Evaluation of the impact of freezing technique on pore-structure characteristics of highly decomposed peat using X-ray micro-computed tomography

Majou¹,

Bruand²,

Rozenbaum³

et al. 2022

Int. Agrophys.

View full text Add to dashboard Cite

A b s t r a c t. The modelling of peatland functioning requires detailed knowledge of the peat structure. To this end, freezing is nowadays increasingly used to obtain X-ray micro computed tomography (X-ray -CT) images. The aim of this study was to analyze the structure of a peat material before freezing and post-defreezing using X-ray -CT and to look for possible alterations in the structure by analyzing the air-filled porosity. A highly decomposed peat material close to water saturation was selected for study. Three samples were analyzed before freezing and post-defreezing using an X-ray -CT Nanotom 180NF. Results showed that the continuity and cross section of the air-filled tubular pores several hundreds to about one thousand micrometers in diameter were altered post-defreezing. Many much smaller air-filled pores not detected before freezing were also recorded post-defreezing. Detailed analysis showed a dramatic increase in the number of air-filled pores ranging between 1 voxel (216 10 3 µm 3 ) and 50 voxels (10.8 10 6 µm 3 ) in volume. The volume of these pores newly occupied by air using X-ray -CT and their total volume was found to be consistent with the one calculated as resulting from the increase in the specific volume of water when it turns into ice.K e y w o r d s: freezing technique, peat pore structure, image analysis, X-ray computed tomography

show abstract

Section: Resultssupporting

confidence: 68%

Evaluation of the impact of freezing technique on pore-structure characteristics of highly decomposed peat using X-ray micro-computed tomography

Majou¹,

Bruand²,

Rozenbaum³

et al. 2022

Int. Agrophys.

View full text Add to dashboard Cite

show abstract

“…Fibric component ≥ 90%, sapric component ≪ 10% of horizon volume. Content of rubbed fibres (Lévesque and Dinel, 1977;Lévesque et al, 1980;Green et al, 1993) ≥ 40% of soil by dry weight (105 °C). † † R: hard bedrock underlying the soil (IUSS Working Group WRB, 2006;Soil Survey Staff, 2014).…”

Section: The Pedon a "Sample Of Soil"mentioning

confidence: 99%

Humusica 1, article 1: Essential bases – Vocabulary

Zanella

Ponge

Gobat

et al. 2018

Applied Soil Ecology

View full text Add to dashboard Cite

“…Hesselmann (1926), Hartmann (1944), Kubiëna (1953), von Mückenhausen (1962, Babel (1971), Delecour and Kindermans (1977) described the morphology and ecology of specialized humus types (the upper part of a soil profile which is enriched in organic matter) in central Europe. With similar ecological approaches, but in wet environments, Jongerius and Pons (1962) and Levesque et al (1980) proposed a classification of Histic soil horizons and peats. Jenny (1941) proposed an historical formula relating soil genesis and main ecological factors.…”

Section: Quick Look At the Classificationmentioning

confidence: 99%