{"created":"2022-01-27T07:27:42.669071+00:00","id":2003222,"links":{},"metadata":{"_buckets":{"deposit":"633a0449-10d7-42e9-8121-9c4f00c13158"},"_deposit":{"id":"2003222","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"2003222"},"status":"published"},"_oai":{"id":"oai:u-ryukyu.repo.nii.ac.jp:02003222","sets":["1642837622505:1642837905044:1642837910985","1642838403551:1642838407312"]},"author_link":[],"item_1617186331708":{"attribute_name":"Title","attribute_value_mlt":[{"subitem_title":"ジャーガル土壌の物理性改良についてニービ混合土の毛管吸水量および貫入試験(農業工学科)","subitem_title_language":"ja"},{"subitem_title":"On the Physical Improvement of Jaagaru Clay. Capillary moisture and penetration resistance of Jaagaru mixed with Niibi (Department of Agricultural Engineering)","subitem_title_language":"en"}]},"item_1617186419668":{"attribute_name":"Creator","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"宮城, 調勝","creatorNameLang":"ja"}]},{"creatorNames":[{"creatorName":"Miyagi, Norikatsu","creatorNameLang":"en"}]}]},"item_1617186476635":{"attribute_name":"Access Rights","attribute_value_mlt":[{"subitem_access_right":"open access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_abf2"}]},"item_1617186626617":{"attribute_name":"Description","attribute_value_mlt":[{"subitem_description":"ここでは土壌の2,3の性質について, ジャーガル土壌と各混合土の相対的比較を行なってきた。すなわち, ニービを混合することによって土壌の透水性が大きくなり, 時間当り毛管補給水量も多くなる。また土塊の破砕率が良くなり, 耕運作業が効率的になることも明らかである。しかし降雨後の農作業機械の作業効率の面から考えると, その要素の一部である土壌の支持力が低下する結果となっている。混合土における農作業機械, 特に問題となるハーベスターおよびトラクターの走行性については, 負荷状態での諸条件を考慮したスベリ率等試験ホ場における今後の試験結果によって検討されねばならない。また, ジャーガル地帯は度重なる干ばつ時に, その被害を常に最小限に止めてきた地域であり, かんがい水確保の見透しもたたない現状では, その長所を失なわない範囲内での土壌改良を前提とするべきである。","subitem_description_type":"Other"},{"subitem_description":"Jaagaru soils in Okinawa consist of fine cohesive clays and its permeability in field has very small values. In this area, it has been exerting a bad influence upon growth of crops and operation efficiency of farm-machinery, that poor drainage conditions after raining are lengthily continuous. In order to solve these subjects, we have need to improve Jaagaru physically, but we have no coarse-grained soil excepting fine sand of Niibi. In this paper, the tests on Jaagaru mixing with Niibi has been studied in laboratory. The results obtained from these experiments are as follows. 1). We can sharply improve permeability and increase capillary moisture from groundwater, by mixing Niibi in Jaagaru. 2). Unconfined compressive strength and cone penetration resistance decreased according as increased percentage of Niibi. Okinawa is subject to frequent drought, but we have no irrigation water. We must take care of over drainage as the case stands.","subitem_description_type":"Other"},{"subitem_description":"紀要論文","subitem_description_type":"Other"}]},"item_1617186643794":{"attribute_name":"Publisher","attribute_value_mlt":[{"subitem_publisher":"琉球大学農学部","subitem_publisher_language":"ja"}]},"item_1617186702042":{"attribute_name":"Language","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_1617186783814":{"attribute_name":"Identifier","attribute_value_mlt":[{"subitem_identifier_type":"HDL","subitem_identifier_uri":"http://hdl.handle.net/20.500.12000/4208"}]},"item_1617186920753":{"attribute_name":"Source Identifier","attribute_value_mlt":[{"subitem_source_identifier":"0370-4246","subitem_source_identifier_type":"ISSN"},{"subitem_source_identifier":"AN00250548","subitem_source_identifier_type":"NCID"}]},"item_1617186941041":{"attribute_name":"Source Title","attribute_value_mlt":[{"subitem_source_title":"琉球大学農学部学術報告","subitem_source_title_language":"ja"},{"subitem_source_title":"The Science Bulletin of the Faculty of Agriculture. University of the Ryukyus","subitem_source_title_language":"en"}]},"item_1617187056579":{"attribute_name":"Bibliographic Information","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1978-12-01","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"25","bibliographicPageEnd":"349","bibliographicPageStart":"339"}]},"item_1617258105262":{"attribute_name":"Resource Type","attribute_value_mlt":[{"resourcetype":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_1617265215918":{"attribute_name":"Version Type","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_1617605131499":{"attribute_name":"File","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_access","filename":"KJ00000161962.pdf","mimetype":"application/pdf","url":{"objectType":"fulltext","url":"https://u-ryukyu.repo.nii.ac.jp/record/2003222/files/KJ00000161962.pdf"},"version_id":"69231a78-c10d-4f95-82d1-35ecb364139e"}]},"item_title":"ジャーガル土壌の物理性改良についてニービ混合土の毛管吸水量および貫入試験(農業工学科)","item_type_id":"15","owner":"1","path":["1642837910985","1642838407312"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2008-02-14"},"publish_date":"2008-02-14","publish_status":"0","recid":"2003222","relation_version_is_last":true,"title":["ジャーガル土壌の物理性改良についてニービ混合土の毛管吸水量および貫入試験(農業工学科)"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2022-10-31T01:17:55.834374+00:00"}