Outline of the Comprehensive Soil Classification System of Japan – First Approximation

Obara, Hiroshi; Maejima, Yuji; Kohyama, Kazunori; Ohkura, Toshiaki; Takata, Yusuke

doi:10.6090/jarq.49.217

Cited by 52 publications

(41 citation statements)

References 6 publications

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“…The parent ash for the Bs1 horizon may be older than those for A and EB horizons. Thus, pedon 6 was not classified as a Podzol in CSCSJ although it had both a podzolic illuvial horizon (analytical) and a podzolic illuvial horizon (morphological) (Obara et al 2011). Differences in parent materials found after laboratory analyses were somewhat gradual, as in the glass content.…”

Section: Soil Classificationmentioning

confidence: 97%

“…With an incorporation of analytical data, transitional soils can be systematically named using a key-out order as well as typical soils (IUSS Working Group WRB 2007;Soil Survey Staff 2010;Obara et al 2011). We tried to evaluate soils with multiple forming processes such as andosolization, podzolization, etc., selecting an area having different soil names from a local soil map.…”

Section: Introductionmentioning

confidence: 99%

“…It is desired that their results are reflected in the soil classification names. An integrated soil classification (Comprehensive Soil Classification System of Japan, CSCSJ, Obara et al 2011) was systematized from the united soil classification system of Japan-2 nd Approximation (The Fourth Committee for Soil Classification and Nomenclature The Japanese Society of Pedology 2003) and The Cultivated Soils in Japan-Third Approximation (1995). Merits of this system are that it covers both forest and cultivated soils in Japan and has a key-out system to evaluate soils with multiple soil formation processes.…”

Section: Introductionmentioning

confidence: 99%

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Properties and classification of volcanic ash soils around Lake Kuwanuma on the eastern footslope of Mt. Funagata in Miyagi prefecture, northeastern Japan

Nishiue

Nanzyo

Kanno

et al. 2014

Soil Science and Plant Nutrition

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One of the developments in recognition of soil properties and different soils is from morphological to analytical. With an incorporation of analytical data, transitional soils can be systematically named using a key-out order as well as typical soils. Our major objective was to evaluate soils with multiple forming processes such as andosolization, podzolization, etc., using soil analytical data, selecting a small area having different soil names based on soil morphological properties. According to a local soil map, Ando soils, Brown forest soils (Dark) and Wet and Dry podzols soils are adjacently distributed around Lake Kuwanuma on the eastern footslope of Mt. Funagata in Miyagi prefecture, northeastern Japan. We studied the morphological, chemical and mineralogical properties of these soils and classified them according to the recent Comprehensive Soil Classification System of Japan (CSCSJ), United States Department of Agriculture Soil Taxonomy (ST) and the World Reference Base for Soil Resources (WRB). The elevation of Lake Kuwanuma is 780 m above sea level and a plateau is located next to a steep slope on the western side of the lake. Three pedons were sampled from the northern side of Lake Kuwanuma, and 3 additional pedons were sampled from the plateau. The average difference in elevation between these two groups of pedons was 229 m. All 6 pedons were classified as Andosols in CSCSJ, Udands in ST and Andosols in WRB. Thus, andosolization was the dominant soil-forming process throughout the study area. The major modification of Andisols in the study area was caused by forest vegetation. Of the 6 pedons sampled, three were classified as Fulvudands in ST and had the Fulvic prefix qualifier in WRB. Furthermore, weak podzolization was suggested on the basis of soil profile observations. One pedon on the plateau had a Bs horizon, which satisfied the spodic horizon requirements of ST. Thus, weak podzolization, especially on the plateau, was another accessory characteristic in the present study area. The nearby distribution of Podzols soils and Ando soils in the local soil map may be explained by differences in temperature, leaching intensity and other factors. A podzolic subgroup of Andosols/Udands was desired to express the properties of pedons on the plateau in the lower categories of the recent soil classification systems.

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Section: Soil Classificationmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Properties and classification of volcanic ash soils around Lake Kuwanuma on the eastern footslope of Mt. Funagata in Miyagi prefecture, northeastern Japan

Nishiue

Nanzyo

Kanno

et al. 2014

Soil Science and Plant Nutrition

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“…It was classified as a Typic Fluvaquent (Soil Survey Staff 1999) or Haplic Gray Lowland soil (Obara et al 2011). The selected properties of the soil are as follows: pH 6.13, total carbon (C) content 34.8 g kg −1 , total nitrogen (N) content 3.09 g kg −1 , and clay content 21.9 percent (Matsuoka and Moritsuka 2011).…”

Section: Soil Anaerobic Incubationmentioning

confidence: 99%

Increase in the Capacity of Interlayer Sites in a Paddy Soil as a Possible Factor Affecting the Dynamics of Fixed Ammonium at the Initial Stage of Anaerobic Incubation

Matsuoka

Moritsuka

2015

Communications in Soil Science and Plant Analysis

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To evaluate whether the capacity of interlayer sites affects the dynamics of fixed ammonium (NH 4 + ) in a paddy soil, a combination of potassium (K)-saturation treatment and stepwise extraction of nonexchangeable K with 0.01 mol L −1 hydrochloric acid was applied to a soil incubated anaerobically up to 70 days. The capacity of interlayer sites increased with an increase of weakly fixed NH 4 + during the initial 28 days (r = 0.78, P < 0.01), and remained stable thereafter. On the other hand, the concentration of exchangeable NH 4 + increased curvilinearly during the whole incubation period, which was correlated with an increase of weakly fixed NH 4 + (r = 0.85, P < 0.01). These results suggested that the dynamics of weakly fixed NH 4 + in a paddy soil is regulated not only by the chemical equilibrium between exchangeable and weakly fixed NH 4 + but also by the capacity of interlayer sites within a few weeks after flooding.

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“…Soil groups were divided according to their morphology and parent material; soil series groups were divided according to the variation of the thickness of humus layer, freckling and texture; soil series is basic unit classification (grouped according to parent material, morphology and process) [63,64]. Table 3 lists the soil groups in Okazaki City.…”

Section: Soilmentioning

confidence: 99%

Physical Flood Vulnerability Mapping Applying Geospatial Techniques in Okazaki City, Aichi Prefecture, Japan

et al. 2017

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Flooding has been increasing since 2004 in Japan due to localized heavy rainfall and geographical conditions. Determining areas vulnerable to flooding as one element of flood hazard maps related to disaster management for urban development is necessary. This research integrated Remote Sensing data, the Geography Information System (GIS) method and Analytical Hierarchy Process (AHP) calculation to determine the physical flood-vulnerable area in Okazaki City. We developed this research by applying data from the Geospatial Information Authority of Japan (GSI) to generate the slope map and drainage density; AMEDAS (Automated Meteorological Data Acquisition System) from the Japan Meteorological Agency (JMA) to generate the rainfall data; Soil map from the Ministry of Land, Infrastructure, Transport and Tourism (MLIT) data; and Sentinel-2 imagery to generate the land cover map. We applied the AHP calculation for weighting pairwise the parameters by comparing five iterations of the normalized matrix. We utilized the spatial analysis tool in ArcGIS to run the pairwise comparison to adjudicate the distribution of flooding according to the AHP procedure. The percentage of relative weight was slope (43%), drainage density (20%), rainfall intensity (17%), then both infiltration rate and land cover (10%). The consistency value was reasonable: consistency index (CI-0.007) and consistency ratio (CR-0.6%). We generated high accuracy for flood vulnerability prediction; 0.88 for Probability of Detection (POD), 0.28 for Probability of False Detection (POFD), 0.44 for Critical Success Index (CSI), 1.9 for Bias, and 95 of Area under Curve (AUC). The flood vulnerability was matched to the flood inundation survey of Okazaki City in August 2008 and indicated an excellent Relative Operating Characteristic (ROC).

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Outline of the Comprehensive Soil Classification System of Japan – First Approximation

Cited by 52 publications

References 6 publications

Properties and classification of volcanic ash soils around Lake Kuwanuma on the eastern footslope of Mt. Funagata in Miyagi prefecture, northeastern Japan

Properties and classification of volcanic ash soils around Lake Kuwanuma on the eastern footslope of Mt. Funagata in Miyagi prefecture, northeastern Japan

Increase in the Capacity of Interlayer Sites in a Paddy Soil as a Possible Factor Affecting the Dynamics of Fixed Ammonium at the Initial Stage of Anaerobic Incubation

Physical Flood Vulnerability Mapping Applying Geospatial Techniques in Okazaki City, Aichi Prefecture, Japan

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