CHEMICAL PROPERTIES AND CLASSIFICATION OF ORGANIC HORIZONS FROM SELECTED SOILS IN BRITISH COLUMBIA

1987 ◽  
Vol 67 (2) ◽  
pp. 383-394 ◽  
Author(s):  
L. E. LOWE ◽  
A. M. SCAGEL ◽  
K. KLINKA
Keyword(s):  
British Columbia ◽  
Correlation Analysis ◽  
Key Words ◽  
Chemical Properties ◽  
Morphological Characteristics ◽  
Soil Classification ◽  
Canonical Variates Analysis ◽  
Organic Horizons ◽  
Canonical Variates

In order to assess the extent to which chemical properties of organic horizons support their differentiation on the basis of morphological characteristics, as used in the Canadian System of Soil Classification (CSSC), a total of 265 samples of organic horizons (including L, F, H, Of, Om and Oh) were analyzed for 26 chemical properties (organic and inorganic). One-way analysis of variance, correlation analysis and tests of normality were used to select variables for canonical variates analysis (CVA). The results of CVA indicated that the six types of horizon could be distinguished by a combination of chemical properties, and that the grouped upland (L-F-H) horizons could be distinguished from the grouped wetland (Of-Om-Oh) horizons. The results provided support for the present usage in the CSSC, based on field morphology. It was concluded that there remained a need to improve definitions, to review designations, and to develop quantitative diagnostic criteria for organic horizons. Some problems in the classification of organic horizons are discussed, particularly in relation to a hierarchical system. Key words: Organic horizons, horizon classification, British Columbia, chemical properties

Fluorescence spectroscopy and chemometrics for classification of breast cancer samples—a feasibility study using extended canonical variates analysis

2007 ◽  
Vol 21 (10-11) ◽  
pp. 451-458 ◽  
Author(s):  
Lars Nørgaard ◽  
György Sölétormos ◽  
Niels Harrit ◽  
Morten Albrechtsen ◽  
Ole Olsen ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Fluorescence Spectroscopy ◽  
Feasibility Study ◽  
Canonical Variates Analysis ◽  
Canonical Variates

scholarly journals Classificação dos solos da Planície do Delta do Parnaíba, PI (Soil classification of the Parnaíba Delta Plain, PI (1))

2019 ◽  
Vol 12 (4) ◽  
pp. 1466
Author(s):  
Léya Rodrigues Cabral ◽  
Gustavo Souza Valladares ◽  
Marcos Gervasio Pereira ◽  
Carlos Roberto Pinheiro Júnior ◽  
Andréa Maciel Lima ◽  
...  
Keyword(s):  
Rio De Janeiro ◽  
Chemical Properties ◽  
Morphological Characteristics ◽  
Soil Classification ◽  
Soil Profiles ◽  
Delta Plain ◽  
The North ◽  
Methodological Procedures ◽  
Physical And Chemical ◽  
Pedogenetic Processes

A diversidade natural dos solos reflete na paisagem a sua própria evolução, sendo estes resultados das interações entre os fatores de formação: material de origem, relevo, clima, organismos e tempo. Tais fatores, adjuntos aos processos pedogenéticos na evolução dos solos, definirão suas propriedades físicas e químicas, fundamentais para a caracterização dos solos. Nesse sentido, este estudo tem com o objetivo geral caracterizar e classificar os tipos de solos da planície do Delta do Parnaíba, localizada na região do Norte Piauiense, tendo como limite natural os rios Parnaíba e Igaraçu e o oceano Atlântico. Para a identificação e caracterização dos perfis de solos, foram realizadas atividades de campo, a fim de descrever e coletar os solos mais representativos na área de estudo. Foram descritos e coletados quinze perfis de solo por meio de trincheiras e tradagens, com extensões profundamente suficientes para avaliação das características morfológicas. Os critérios e procedimentos metodológicos seguiram a padronização adotada no Brasil. As análises físicas e químicas foram realizadas no Laboratório de Gênese e Classificação dos Solos da Universidade Federal Rural do Rio de Janeiro. Através dos resultados analisados foi possível classificar os solos de acordo com os níveis categóricos do Sistema Brasileiro de Classificação dos solos. As principais ordens de solos encontradas na área de estudo foram os Neossolos, Planossolos, Gleissolos, Espodossolos, Cambissolos e os Vertissolos. Novas classificações foram sugeridas, devido a características significativas encontradas nos perfis de solos que não se enquadrarem no Sistema Brasileiro de Classificação de Solos.  A B S T R A C TThe natural diversity of the soils reflects in the landscape its own evolution, being these results of the interactions between the factors of formation: material of origin, relief, climate, organisms and time. These factors, coupled with pedogenetic processes in soil evolution, will define their physical and chemical properties, fundamental for soil characterization. In this sense, this study has the general objective of characterizing and classifying the soil types of the Parnaíba Delta plains, located in the North Piauiense region, with the Parnaíba and Igaraçu rivers and the Atlantic Ocean as their natural limit. For the identification and characterization of soil profiles, field activities were carried out in order to describe and collect the most representative soils in the study area. Fifteen soil profiles were described and collected through trenches and traditions, with extensions deep enough to evaluate the morphological characteristics. The criteria and methodological procedures followed the standardization adopted in Brazil. Physical and chemical analyzes were performed at the Genesis and Soil Classification Laboratory of the Federal Rural University of Rio de Janeiro. Through the analyzed results it was possible to classify the soils according to the categorical levels of the Brazilian Soil Classification System. The main orders of soils found in the study area were the Neosols, Planosols, Gleysols, Spodosols, Cambisols and Vertisols. New classifications were suggested, due to significant characteristics found in soil profiles that do not fit into the Brazilian Soil Classification System.Keywords: Soil classification; Parnaíba Delta: pedogenetic processes.

scholarly journals PALE SOILS ON CARBONATE-FREE DEPOSITS IN CENTRAL SIBERIA AND THEIR TAXONOMIC POSITION IN THE SOIL CLASSIFICATION OF RUSSIA

2015 ◽  
pp. 29-50 ◽  
Author(s):  
T. V. Ananko ◽  
M. I. Gerasimova ◽  
D. E. Konyushkov
Keyword(s):  
Soil Cover ◽  
Analytical Data ◽  
Chemical Properties ◽  
Acid Soils ◽  
Soil Classification ◽  
Soil Profiles ◽  
New Classification ◽  
Taxonomic Level ◽  
Physical Chemical

Based upon a comprehensive analysis of detailed descriptions of soil profiles and analytical data obtained by I. Sokolov, V. Zolnikov, L. Yelovskaya and other researchers, as well as upon data on the soil-forming factors, an attempt is made to determine the taxonomic level of pale undifferentiated neutral and slightly acid soils derived from carbonate-free deposits in the new classification system of Russian soils (versions 2004, 2008). The above group of soils is not uniform. According to their diagnostic morphological and physical-chemical properties the loamy permafrost-affected soils with ice-rich permafrost should be placed in the order of cryometamorphic or iron-metamorphic soils. The loamy sandy soils with dry permafrost may be placed in the same order. The soils with a shallow profile (< 30 cm) on hard parent rock should be qualified as members of the order of lithozems. The specific features of these soils make it possible to suggest new elements to the soil classification. A subtype of pale-metamorphized soils is offered to recognize the types of rzhavozems and raw-humus rzhavozems as the soils transitional to the pale soils. This suggestion is aimed at harmonization of a variety of ideas on the genesis, conditions for the development and nomenclature of soils, which permits us to give a more complete and reliable perception of the soil cover in the Central Siberian plateau.

CLASSIFICATION OF SOILS DEVELOPED ON BASIC PARENT MATERIALS IN THE CANADIAN AND FRENCH SYSTEMS OF SOIL CLASSIFICATION

1986 ◽  
Vol 66 (1) ◽  
pp. 177-181 ◽  
Author(s):  
C. R. DE KIMPE ◽  
J. DEJOU
Keyword(s):  
Organic Matter ◽  
Key Words ◽  
Bulk Density ◽  
Amorphous Material ◽  
Soil Classification ◽  
Parent Materials

Six profiles of soils developed on parent materials poor in SiO2 but rich in total Fe (> 10% Fe2O3), were sampled in Canada and France. In the French system of soil classification, the soils were classified as Andosols or Andic and Andic Brown soils because of their large amounts of < 50 μm particles and amorphous material, and their low bulk density related to large percentages of organic matter. All profiles contained one or more horizons that met the criteria of a Podzolic B horizon in the Canadian system of soil classification. The absence of a class for Andosols makes an appropriate classification of these soils difficult in the Canadian system. Key words: Andosols, Andic soils, Andic brown soils, podzols, soil classification

MORPHOLOGICAL AND CHEMICAL CHARACTERISTICS OF THE SOLONETZIC SOILS OF NORTHWESTERN ALBERTA

1964 ◽  
Vol 44 (1) ◽  
pp. 22-33 ◽  
Author(s):  
S. W. Reeder ◽  
Wm. Odynsky
Keyword(s):  
Organic Carbon ◽  
Chemical Properties ◽  
Morphological Characteristics ◽  
Exchange Capacity ◽  
Exchangeable Cations ◽  
Chemical Characteristics ◽  
Total Calcium ◽  
Soluble Salts ◽  
Calcium Magnesium

The morphological characteristics and average chemical properties for 69 Solonetzic soils of northwestern Alberta are presented. The chemical data include conductivity and soluble salts, exchangeable cations and exchange capacity, pH, organic carbon, and total calcium, magnesium, and sodium. The results showed that the soils classified as Solonetz and Solodized Solonetz possessed properties in agreement with the limits proposed for soils of the Solonetzic Order, whereas the soils classified as Solods had chemical properties that placed them in a borderline position with the soils of this Order. It is proposed that consideration be given to the classification of a group of soils developed on saline materials that have a characteristic morphology and possess chemical properties that do not quite meet the limits required for soils of the Solonetzic Order.

CLASSIFICATION, MACROMORPHOLOGY AND CHEMICAL CHARACTERISTICS OF FOLISOLS FROM BRITISH COLUMBIA

1987 ◽  
Vol 67 (4) ◽  
pp. 765-778 ◽  
Author(s):  
C. A. FOX ◽  
C. TARNOCAI ◽  
R. TROWBRIDGE
Keyword(s):  
British Columbia ◽  
Key Words ◽  
Classification System ◽  
Organic Material ◽  
Soil Classification ◽  
Organic Soil ◽  
Soil Survey ◽  
Western Hemlock ◽  
Chemical Characteristics ◽  
Expert Committee

The Folisol great group within the Organic soil order was expanded by the Expert Committee on Soil Survey to include the subgroups Hemic, Humic, Lignic and Histic Folisols. Representative Folisols from the Coastal Western Hemlock biogeoclimatic zone in British Columbia were studied to document the macromorphology and chemical characteristics of these subgroups. A proposal for improving F and H horizon designations is also presented. This documentation and improvements to the classification system provide a better basis for the soil surveyor to recognize and account for thick accumulations (> 40 cm) of folic materials overlying mineral or peat materials as well as accumulations (> 10 cm) over rock or fragmental material. Key words: Folisols, organic material, soil classification, Organic soil order

MORPHOLOGY AND CLASSIFICATION OF SOME DARK-COLORED SOILS OF VANCOUVER ISLAND, BRITISH COLUMBIA

1980 ◽  
Vol 60 (4) ◽  
pp. 747-755 ◽  
Author(s):  
KLAAS BROERSMA ◽  
L. M. LAVKULICH
Keyword(s):  
British Columbia ◽  
Soil Classification ◽  
Vancouver Island

In the southeastern portion of Vancouver Island are found soils that are dark-colored in their surface horizons. These dark-colored surface horizons are mainly the result of the climate and vegetation. The surface horizons can be classified as either Ah(f) or Bhf horizons using the criteria of the System of Soil Classification for Canada. The B horizons were designated podzolic (Bf or Bhf) even though not all criteria were met for all horizons. The soils were classified as Sombric Humo Ferric Podzols, as this subgroup appeared the most suitable.

scholarly journals Characterization and Classification of Soils of a Toposequence in a Derived Savannah Agroecological Zone of Nigeria

2019 ◽  
Vol 13 (1) ◽  
pp. 44-50 ◽  
Author(s):  
Kehinde A. Adegbite ◽  
Millicent E. Okafor ◽  
Aruna O. Adekiya ◽  
Elizabeth T. Alori ◽  
Ojo T. V. Adebiyi
Keyword(s):  
Management Practices ◽  
Organic Matter Content ◽  
Chemical Properties ◽  
Morphological Characteristics ◽  
Matter Content ◽  
Physical And Chemical Properties ◽  
Bottom Slope ◽  
Physical And Chemical ◽  
And Chemical Properties

Background:Soil properties are anisotropic in nature, hence the need to study soil associations and regional landscapes for sustainable nutrient management and soil profile is an important tool which can be utilized for this purpose.Objective:The objectives of the study are to describe the morphology of the soils of the toposequence, determine their physical and chemical properties, classify them and make an appraisal of their agricultural potentials.Methods:Three slope classes were considered and a total of three profile pits, one on each slope were studied and described in the field morphologically at Eleyin Farms Omu-Aran, Kwara State, Nigeria, which was a newly opened up plantation.Samples of soil were collected from the horizons of the profile pits. The soil samples were analyzed for their physical and chemical properties.Results:All the three pedons showed appreciable differences in physical, chemical, and morphological characteristics of the soils and their classifications were determined as guided by their characteristics. The textural classes were defined mainly by the sand compositions which decreased from the upper and middle slopes down to the bottom slope, and the clay compositions which increased progressively from the uppermost slope through the middle slope to the bottom slope. Silt compositions did not exhibit any particular pattern.Conclusion:Thus, sand and clay compositions were more significant and relevant to the textural classification of the soils of the area than silt. The low nutrient status of the soils can be ameliorated by incorporation of organic or farm residues to increase the organic matter content of the soil, and also improve management practices and guided chemical fertilizer use. The soils of the area were classified as Typic Haplustalf (USDA), and Ferric Luvisol (FAO).

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