{"created":"2023-05-15T13:39:01.883629+00:00","id":3115,"links":{},"metadata":{"_buckets":{"deposit":"127e1b1e-e538-4386-8b99-59ec46b439ef"},"_deposit":{"created_by":12,"id":"3115","owners":[12],"pid":{"revision_id":0,"type":"depid","value":"3115"},"status":"published"},"_oai":{"id":"oai:repository.naro.go.jp:00003115","sets":["87:660:683:404:409"]},"author_link":["1145","1580","2071","2282","6601","1956"],"item_10002_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2011-03","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"73","bibliographicPageStart":"1","bibliographicVolumeNumber":"29","bibliographic_titles":[{"bibliographic_title":"農業環境技術研究所報告"},{"bibliographic_title":"Bulletin of National Institute for Agro-Environmental Sciences","bibliographic_titleLang":"en"}]}]},"item_10002_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Soil classification in Japan has developed in line with the public work projects, soils in Japan have tended to be classified independently for different land use, such as cultivated area(paddy field, upland field), forest, and so forth. As a result, there is no available soil map drawn with a single framework of soil classification in practical map scale. This causes a barrier to advancement of environmental studies such as watershed-level nutrient cycling, carbon sequestration and so on. To find a way out of this situation, The Japanese Society of Pedology developed a new soil classification system, and published the Unified Soil Classification System of Japan‐2nd Approximation(2002). However, since this classification system lacked lower categories for attribution such as soil texture and the presence or absence of gravel layers, it was insufficient to provide practical soil mapping units. To address this issue, we propose the Comprehensive Soil Classification System of Japan‐First 1st Approximation, a more practical system that enables the nationwide classification of soils. We applied the following four basic policies in drafting this proposed classification system:(1) integrating the Classification of Cultivated Soils in Japan‐Third Approximation with the Unified Soil Classification System of Japan‐2nd Approximation(2002);(2) retaining as much correspondence as possible to the Classification of Cultivated Soils in Japan ‐Third Approximation to enable continued use of existing data and knowledge;(3) keeping less laboratory analysis to obtain criteria for classification so as to enable easy classification for users;(4) validating the system using available data, and do not introduce new taxonomic units and differentiating criteria that are not absolutely necessary. In this proposed system, we defined the following categories: soil great group, soil group, soil subgroup, and soil series group, determined by dichotomous keys that defined in Chapter 6. The keys consist of diagnostic horizons, diagnostic properties, and diagnostic materials, which defined as objectively and quantitatively as possible. Identifying a soil is to determine the presence or absence the diagnostic horizons or characteristics in the soil profile, and the position in which they appear in the profile. The soil great group has 10 great groups: Man-made soils, Organic soils, Podzols, Andosols, Dark Red soils, Lowland soils, Red-Yellow soils, Stagnic soils, Brown Forest soils, and Regosols. Each soil great group is further subdivided into 1‒6 soil groups according to moisture regime, parent materials, and other soil formation factors. Soil subgroups are lower categories, ranging from soils with properties intermediate to the different soil groups to those that are typical of a particular soil group. Soil subgroups are further divided into soil series groups according to differences in soil texture, presence or absence of a gravel layer, and other characteristics. Consequently, this proposed system contains 27 soil groups, 116 soil subgroups and 381 soil series groups. Setting these 4 category levels enables the system to be used for both general outlines and detailed description, and for the creation of soil maps and soil information of various scales. Since development of this proposed system required consideration of the regional distribution of soils, land use diversity and other purposes, we received strong cooperation of university and independent administrative research institutions experts joined as outside members of a committee, which National Institute for Agro-Environmental Sciences personnel were involved in soil classification.","subitem_description_type":"Abstract"},{"subitem_description":"わが国の土壌分類は、国の各種事業と共に発展してきたため、農耕地 (水田、畑) 、林野など、事業単位毎の分類が作成されてきた。そのため、異なる地目・土地利用を含む地域を同一基準に基づいて分類された実用的な縮尺の土壌図はほとんどなく、流域レベルの物質移動や土壌炭素蓄積などの環境問題に土壌図を利用するのに大きな制約となっている。一方、日本ペドロジー学会は、新しい土壌分類体系の検討を行い、2003年に「日本の統一的土壌分類体系　－第二次案 (2002) －」を発行した。しかし、この案も、礫層の有無や土性などの特徴を区分する下位カテゴリーがないため、実用的な分類単位の提供には十分ではなかった。これらの問題に対処するため、全国土の土壌を分類でき、実用性の高い「包括的土壌分類　第1次試案」を作成した。　本分類案の作成に当たっては、次の4点を基本方針とした。1) 農耕地土壌分類 (第3次改訂版) と日本の統一的土壌分類体系　－第二次案 (2002) －を融合することにより、作成する。2) 蓄積されたデータおよび知見を継承できるように、農耕地土壌分類 (第3次改訂版) との対応関係を出来るだけ保つ。3) 実際の分類を容易にするため、分類に必要な調査・分析項目を最小限にとどめる。4) 入手可能なデータに基づいて検証を行い、必要性が乏しい新たな分類単位・識別基準を導入しない。　本分類案は、上位カテゴリーから順に、土壌大群、土壌群、土壌亜群、土壌統群から構成され、キーアウト方式によって土壌分類を決定する。このために、「特徴層位」、「識別特徴」、「識別物質」を出来るだけ客観的かつ定量的に定義し、断面内でのそれらの有無・出現位置をもとに分類名を決める。土壌大群は、造成土大群、有機質土大群、ポドゾル大群、黒ボク土大群、暗赤色土大群、低地土大群、赤黄色土大群、停滞水成土大群、褐色森林土大群、未熟土大群の10土壌大群からなり、各土壌大群は、水分条件や土壌母材などによって1～6の土壌群に細分される。また、各土壌群間で中間的な性質をもつ土壌からその土壌群の典型的な性質をもつ土壌までを土壌亜群に、さらに土壌亜群を土性の違いや礫層の有無などによって土壌統群に細分した。土壌群、土壌亜群、土壌統群の数は、それぞれ、27、116、381である。この4段階のカテゴリーを設定したことにより、概説的な記述から詳細なとりまとめ、また各種縮尺の土壌図および土壌情報の作成に対応できる。　なお、本分類案の作成においては、土壌の地域的な分布、多様な土地利用などをカバーする必要があるため、アドバイザーとして大学および独立行政法人試験研究機関の専門家に外部委員をお願いし、農業環境技術研究所内の土壌分類関係者からなる内部委員とともに委員会を組織した。","subitem_description_type":"Abstract"}]},"item_10002_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.24514/00002990","subitem_identifier_reg_type":"JaLC"}]},"item_10002_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"独立行政法人 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Kazunori","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"1145","nameIdentifierScheme":"WEKO"},{"nameIdentifier":"50414503","nameIdentifierScheme":"e-Rad","nameIdentifierURI":"https://kaken.nii.ac.jp/ja/search/?qm=50414503"},{"nameIdentifier":"Solk","nameIdentifierScheme":"researchmap","nameIdentifierURI":"http://researchmap.jp/Solk"}]},{"creatorNames":[{"creatorName":"前島, 勇治"},{"creatorName":"マエジマ, ユウジ","creatorNameLang":"ja-Kana"},{"creatorName":"MAEJIMA, Yuji","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"2282","nameIdentifierScheme":"WEKO"},{"nameIdentifier":"80391209","nameIdentifierScheme":"e-Rad","nameIdentifierURI":"https://kaken.nii.ac.jp/ja/search/?qm=80391209"},{"nameIdentifier":"read0202197","nameIdentifierScheme":"researchmap","nameIdentifierURI":"http://researchmap.jp/read0202197"}]},{"creatorNames":[{"creatorName":"浜崎, 忠雄"},{"creatorName":"ハマザキ, タダオ","creatorNameLang":"ja-Kana"},{"creatorName":"HAMAZAKI, 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Approximation","subitem_title_language":"en"}]},"item_type_id":"10002","owner":"12","path":["409"],"pubdate":{"attribute_name":"公開日","attribute_value":"2019-12-20"},"publish_date":"2019-12-20","publish_status":"0","recid":"3115","relation_version_is_last":true,"title":["包括的土壌分類　第1次試案"],"weko_creator_id":"12","weko_shared_id":12},"updated":"2023-05-15T15:23:37.319648+00:00"}