Geotechnical Classification of Peats and Organic Soils

2009 ◽  
pp. 37-37-15 ◽  
Author(s):  
AO Landva ◽  
EO Korpijaakko ◽  
PE Pheeney
Keyword(s):  
Organic Soils

Classification of Organic Soils and Classification of Marls Training Program

2012 ◽  
Author(s):  
Alain Howayek ◽  
Antonio Bobet ◽  
Sulaiman Dawood ◽  
Andrew Ferdon ◽  
Maria Santagata
Keyword(s):  
Training Program ◽  
Organic Soils

scholarly journals Some physical properties of mursh developed on limnic limestones in NW Poland

2017 ◽  
Vol 68 (3) ◽  
pp. 132-139
Author(s):  
Grzegorz Jarnuszewski
Keyword(s):  
Bulk Density ◽  
Organic Soils ◽  
Carbonate Sediments ◽  
Specific Density ◽  
Water Capacity ◽  
Physico Chemical ◽  
Water Retention Properties ◽  
Carbonate Formations ◽  
Bog Soils

AbstractPost-bog soils developed on carbonate sediments are closely related to a young-glacial landscape and postglacial lakes. Drainage of biogenic accumulation area leads to a series of transformations in accumulated formations, including the process of decession. The studies conducted in the years 2009–2012 were focused on post-bog soils near lakes: Strzeszowskie, Sitno and Drawskie in Western Pomerania. The examined soils belong to murshic soils and gleysols (The classification of Polish soils). Mursh horizons contained from 0.2 to 43.3% of carbonate and from 27.2 to 77.6% of non-carbonates fractions (Ncf), and varying amount of organic matter depending on the degree of mineralisation. Specific density of surface horizons was in the range from 1.76 to 2.33 Mg·m−3, and bulk density from 0.28 to 0.68 Mg·m−3. Higher porosity was found in mursh organic soils in comparison to gleysols. The studies showed that the content of carbonate fraction was related with specific density, bulk density, porosity and water capacity. Obtained results of physical and physico-chemical analysis indicate that dewatering depth of post-bog soils developed on limnic limestone are reflected in worsened water retention properties and reduced capillary ascent in the upper layers of carbonate formations of gleysols.

OXYGEN-CONTAINING FUNCTIONAL GROUPS IN ORGANIC SOILS AND THEIR RELATION TO THE DEGREE OF HUMIFICATION AS DETERMINED BY SOLUBILITY IN SODIUM PYROPHOSPHATE SOLUTION

1966 ◽  
Vol 46 (3) ◽  
pp. 237-243 ◽  
Author(s):  
M. Schnitzer ◽  
J. G. Desjardins
Keyword(s):  
Analytical Data ◽  
Group Analysis ◽  
Organic Soil ◽  
Sodium Pyrophosphate ◽  
Organic Soils ◽  
Oh Groups ◽  
Functional Group Analysis ◽  
Phenolic Oh Groups

Carboxyls, phenolic and alcoholic hydroxyls, carbonyls, and methoxyls were determined in 20 organic soil samples that ranged from peats, mucky peats, peaty mucks to mucks. The absorbance of a sodium pyrophosphate extract of each sample served as basis for grouping the samples into three broad classes: (i) peat, (ii) mucky peat – peaty muck, and (iii) muck.A statistical analysis of the analytical data showed that (a) the determination of COOH and of OCH3 groups distinguished between the peat and muck classes, and (b) measurement of alcoholic OH groups differentiated between the peat class and the intermediate class and between the peat and muck classes. The experimental data indicated that increased humification was associated with increases in COOH, OCH3, and to a lesser extent of C==O groups, increased solubility in dilute sodium pyrophosphate solution, decreases in alcoholic OH groups but practically no changes in phenolic OH groups. It is suggested that functional group analysis could be used as a supplementary diagnostic tool for assessing the degree of humification of organic matter in organic soils and could thus serve as an aid in the classification of organic soils.

scholarly journals Characteristics of Lowland Tropical Peatlands: Formation, Classification, and Decomposition

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
A.S. Ratnayake
Keyword(s):  
Late Holocene ◽  
Anthropogenic Activities ◽  
Organic Soils ◽  
Greenhouse Gasses ◽  
Fundamental Factor ◽  
Tropical Lowland ◽  
Tropical Peatlands ◽  
And Function ◽  
Specific Definition

Tropical peatlands occur mostly in coastal lowlands, and it can be considered as larger sinkers of carbon and important ecosystem services for water resources, bio-resources and biodiversity. This article summarised characteristics, formation and classification of tropical lowland peatlands. Tropical peatlands cover about 11% of the global peatland resource (441,025 km2 in area) and the estimation value can be changed with including all histosols and shallow organic soils. Tropical coastal peatlands were predominantly developed during the middle to late Holocene (between 3,500 to 6,000 years BP) under the wet conditions generated after the stabilisation and regression of middle Holocene sea-level highstands. Hydrology is a fundamental factor to the formation and function of tropical peatlands. There is no specific definition for the peatlands based on available references. The available definitions can be broadly divided into authoritative and scientific definitions. The authoritative definitions depend on specific uses and applications, while scientific definitions depend on field observations and experimental design/analytical methods. Tropical peatlands store abundant organic matter. However, the recent anthropogenic activities enhance the emission of stored carbon as greenhouse gasses such as CH4 and CO2.

scholarly journals Project Implementation: Classification of Organic Soils and Classification of Marls—Training of INDOT Personnel

2012 ◽  
Author(s):  
Alain El Howayek ◽  
Antonio Bobet ◽  
Sulaiman Dawood ◽  
Andrew Ferdon ◽  
Marika Santagata
Keyword(s):  
Organic Soils ◽  
Project Implementation

scholarly journals Selected issues relating to classification of mountain organic soils in Poland according to the Polish Soil Classification (2011)

2016 ◽  
Vol 67 (4) ◽  
pp. 185-189
Author(s):  
Bartłomiej Glina ◽  
Adam Bogacz
Keyword(s):  
Organic Materials ◽  
Soil Classification ◽  
Organic Soil ◽  
Soil Types ◽  
Organic Soils ◽  
Mineral Material ◽  
Common Problems ◽  
Definition Of

AbstractDespite a large number of organic soil types and subtypes in the Polish Soil Classification the problems of organic soils classification are still very common. In relation to mountain organic soils, in particular. The aim of this paper is to discuss the most common problems related to mountain organic soils classification according to the Polish Soil Classification. Based on authors’ own research and literature studies mentioned problem was described. This work allows to define some new proposals, which should be considered during developing of the next update of the Polish Soil Classification (PSC). The most important proposals related to: criteria for organic materials and organic soils, taxonomy position and criteria for shallow organic soils and new definition of mineral material admixture in organic soils.

EVALUATION DES CRITÈRES DE DIFFÉRENCIATION POUR LA CLASSIFICATION DE 92 MATÉRIAUX TOURBEUX DU QUÉBEC ET DE L’ONTARIO

1980 ◽  
Vol 60 (3) ◽  
pp. 479-486 ◽  
Author(s):  
M. LÉVESQUE ◽  
H. DINEL ◽  
R. MARCOUX
Keyword(s):  
The Other ◽  
Curvilinear Relationship ◽  
Organic Soils ◽  
Botanical Composition ◽  
Efficient Utilization ◽  
Close Relationship

In order to evaluate the differentiation criteria for classification of organic soils, 92 peat-like materials have been characterized according to criteria generally used by the Canadian Pedological Commission (C.P.C.). The botanical composition and the Ca:Mg ratio have been added to these criteria. A close relationship was found (r = −0.865**) between the pyrophosphate indices obtained by the method adopted by C.P.C. and those measured using the Kaila method. The distribution of peat-like materials which are classified as fibric, mesic and humic was different depending on whether the differentiation criterion used was rubbed fibre or pyrophosphate index. A classification using the first criterion gives a dominant mesic population, while the second criterion favored the fibric group. The curvilinear relationship obtained between the content of rubbed fibres and the pyrophosphate index shows that the degree of decomposition measured by these criteria was proportional only for materials which are fundamentally fibric or humic. The mesic group is more or less well-defined by the two criteria. The botanical composition proved to be the most discriminatory differentiation element. Also, a previous grouping of the materials according to this criterion would ensure a more orderly and efficient utilization of the other characterization criteria, and would provide a better-defined differentiation of the mesic materials.

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