{"created":"2025-04-03T02:23:36.818411+00:00","id":2000780,"links":{},"metadata":{"_buckets":{"deposit":"4943a3b7-d40a-4f0e-9cc1-987cc4d031f5"},"_deposit":{"created_by":74,"id":"2000780","owner":"74","owners":[74],"pid":{"revision_id":0,"type":"depid","value":"2000780"},"status":"published"},"_oai":{"id":"oai:jircas.repo.nii.ac.jp:02000780","sets":["1698892316070:1740979333402"]},"author_link":[],"item_30002_access_rights4":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"open access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_abf2"}]},"item_30002_bibliographic_information29":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2025-03-28","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"68","bibliographicPageStart":"57","bibliographicVolumeNumber":"94","bibliographic_titles":[{"bibliographic_title":"JIRCAS Working Report : Application of farm management models for decision support to smallholder farmers in sub-Saharan Africa","bibliographic_titleLang":"en"}]}]},"item_30002_creator2":{"attribute_name":"作成者","attribute_type":"creator","attribute_value_mlt":[{"creatorAffiliations":[{"affiliationNames":[{"affiliationName":"Japan International Research Center for Agricultural Sciences","affiliationNameLang":"en"}]}],"creatorNames":[{"creatorName":"Koide, Junji","creatorNameLang":"en","creatorNameType":"Personal"}],"creatorType":"Author","nameIdentifiers":[{"nameIdentifier":"0000-0003-1726-4400","nameIdentifierScheme":"ORCID","nameIdentifierURI":"https://orcid.org/0000-0003-1726-4400"}]},{"creatorAffiliations":[{"affiliationNames":[{"affiliationName":"Japan Agricultural Development and Extension Association","affiliationNameLang":"en"}]}],"creatorNames":[{"creatorName":"Yokoyama, Shigeki","creatorNameLang":"en","creatorNameType":"Personal"}],"creatorType":"Author"}]},"item_30002_description9":{"attribute_name":"内容記述","attribute_value_mlt":[{"subitem_description":"Rainwater-harvesting reservoirs in Africa offer substantial potential to support rice irrigation and boost productivity in rainfed lowland areas. However, the effectiveness of such irrigation initiatives hinges on multiple factors beyond hydrological conditions, including social regulations governing irrigation and facility maintenance, availability of labor and financial resources, farmers’ willingness to engage in rice irrigation, and economic viability, which have been underrepresented in the literature. This chapter seeks to address these knowledge gaps and examine the challenges and opportunities of rice irrigation using small reservoirs in northern Ghana, drawing upon field survey findings by Koide et al. (2015) and Yokoyama and Koide (2018). These findings highlight the importance of restricting rice irrigation to supplementary practices during the rainy season, considering that local reservoirs experience reduced water levels during the dry season, prioritizing domestic water supply. Key challenges to the implementation of supplementary irrigation include the absence of customary rules that regulate water use to enable timely irrigation and the competition for labor and financial resources between intensified rice farming and the cultivation of upland crops. There is also a lack of institutional mechanisms to address these farm resource constraints. Based on an analysis of local major crop production costs and on-farm trials of supplementary rice irrigation, the authors further demonstrated that rice yields under supplementary irrigation are increased to a level that exceeds the profitability of pepper, the region’s most lucrative crop. These findings suggest that supplementary irrigation can enhance rice productivity and support its expansion as a cash crop, potentially replacing other high value crops.","subitem_description_language":"en","subitem_description_type":"Abstract"},{"subitem_description":"Chapter 3: Issues and model-based optimization of smallholder technology adoption in lowland cropping systems : Case of irrigation technology in northern Ghana","subitem_description_language":"en","subitem_description_type":"Other"}]},"item_30002_file35":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_access","date":[{"dateType":"Available","dateValue":"2025-04-03"}],"displaytype":"detail","fileDate":[{"fileDateType":"Issued","fileDateValue":"2025-03-28"}],"filename":"jircas_working_report94-_57-68.pdf","filesize":[{"value":"1.1 MB"}],"format":"application/pdf","mimetype":"application/pdf","url":{"label":"jircas_working_report94-_57-68","objectType":"fulltext","url":"https://jircas.repo.nii.ac.jp/record/2000780/files/jircas_working_report94-_57-68.pdf"},"version_id":"7e0f2962-d2d3-4e76-ac67-14db33d77b9c"}]},"item_30002_geolocation20":{"attribute_name":"位置情報","attribute_value_mlt":[{"subitem_geolocation_place":[{"subitem_geolocation_place_text":"Ghana"}]}]},"item_30002_identifier_registration17":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.34556/0002000780","subitem_identifier_reg_type":"JaLC"}]},"item_30002_language12":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_30002_publisher10":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"Japan International Research Center for Agricultural Sciences","subitem_publisher_language":"en"}]},"item_30002_relation18":{"attribute_name":"関連情報","attribute_value_mlt":[{"subitem_relation_name":[{"subitem_relation_name_language":"en","subitem_relation_name_text":"Application of farm management models for decision support to smallholder farmers in sub-Saharan Africa"}],"subitem_relation_type":"isPartOf","subitem_relation_type_id":{"subitem_relation_type_id_text":"https://doi.org/10.34556/0002000771","subitem_relation_type_select":"DOI"}}]},"item_30002_resource_type13":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"book part","resourceuri":"http://purl.org/coar/resource_type/c_3248"}]},"item_30002_source_identifier22":{"attribute_name":"収録物識別子","attribute_value_mlt":[{"subitem_source_identifier":"1341-710X","subitem_source_identifier_type":"PISSN"},{"subitem_source_identifier":"AA11159468","subitem_source_identifier_type":"NCID"}]},"item_30002_title0":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"3-1. Challenges and opportunities of utilizing small reservoirs for rice irrigation in northern Ghana","subitem_title_language":"en"}]},"item_30002_version_type15":{"attribute_name":"出版タイプ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_title":"3-1. Challenges and opportunities of utilizing small reservoirs for rice irrigation in northern Ghana","item_type_id":"40039","owner":"74","path":["1740979333402"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2025-04-03"},"publish_date":"2025-04-03","publish_status":"0","recid":"2000780","relation_version_is_last":true,"title":["3-1. Challenges and opportunities of utilizing small reservoirs for rice irrigation in northern Ghana"],"weko_creator_id":"74","weko_shared_id":-1},"updated":"2025-04-07T05:22:21.351908+00:00"}