Get quick answers to your questions about the article from our AI researcher chatbot
{'id': 'https://openalex.org/W2766386462', 'doi': 'https://doi.org/10.1080/02571862.2017.1354407', 'title': 'Evaluating maize yield variability and gaps in two agroecologies in northern Ghana using a crop simulation model', 'display_name': 'Evaluating maize yield variability and gaps in two agroecologies in northern Ghana using a crop simulation model', 'publication_year': 2017, 'publication_date': '2017-10-19', 'ids': {'openalex': 'https://openalex.org/W2766386462', 'doi': 'https://doi.org/10.1080/02571862.2017.1354407', 'mag': '2766386462'}, 'language': 'en', 'primary_location': {'is_oa': True, 'landing_page_url': 'https://doi.org/10.1080/02571862.2017.1354407', 'pdf_url': 'https://www.tandfonline.com/doi/pdf/10.1080/02571862.2017.1354407?needAccess=true', 'source': {'id': 'https://openalex.org/S2764755494', 'display_name': 'South African Journal of Plant and Soil', 'issn_l': '0257-1862', 'issn': ['0257-1862', '2167-034X'], 'is_oa': False, 'is_in_doaj': False, 'is_core': False, 'host_organization': 'https://openalex.org/P4310320547', 'host_organization_name': 'Taylor & Francis', 'host_organization_lineage': ['https://openalex.org/P4310320547'], 'host_organization_lineage_names': ['Taylor & Francis'], 'type': 'journal'}, 'license': 'cc-by-nc-nd', 'license_id': 'https://openalex.org/licenses/cc-by-nc-nd', 'version': 'publishedVersion', 'is_accepted': True, 'is_published': True}, 'type': 'article', 'type_crossref': 'journal-article', 'indexed_in': ['crossref'], 'open_access': {'is_oa': True, 'oa_status': 'hybrid', 'oa_url': 'https://www.tandfonline.com/doi/pdf/10.1080/02571862.2017.1354407?needAccess=true', 'any_repository_has_fulltext': False}, 'authorships': [{'author_position': 'first', 'author': {'id': 'https://openalex.org/A5035858555', 'display_name': 'Dilys S. MacCarthy', 'orcid': 'https://orcid.org/0000-0002-8062-3499'}, 'institutions': [{'id': 'https://openalex.org/I138690464', 'display_name': 'University of Ghana', 'ror': 'https://ror.org/01r22mr83', 'country_code': 'GH', 'type': 'education', 'lineage': ['https://openalex.org/I138690464']}], 'countries': ['GH'], 'is_corresponding': True, 'raw_author_name': 'Dilys S MacCarthy', 'raw_affiliation_strings': ['Soil and Irrigation Research Centre, School of Agriculture, College of Basic and Applied Sciences, University of Ghana, Kpong, Ghana'], 'affiliations': [{'raw_affiliation_string': 'Soil and Irrigation Research Centre, School of Agriculture, College of Basic and Applied Sciences, University of Ghana, Kpong, Ghana', 'institution_ids': ['https://openalex.org/I138690464']}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5056675331', 'display_name': 'S.G.K. Adiku', 'orcid': 'https://orcid.org/0000-0003-0696-2852'}, 'institutions': [{'id': 'https://openalex.org/I138690464', 'display_name': 'University of Ghana', 'ror': 'https://ror.org/01r22mr83', 'country_code': 'GH', 'type': 'education', 'lineage': ['https://openalex.org/I138690464']}], 'countries': ['GH'], 'is_corresponding': False, 'raw_author_name': 'Samuel G Adiku', 'raw_affiliation_strings': ['Department of Soil Science, School of Agriculture, College of Basic and Applied Sciences, University of Ghana, Legon, Accra, Ghana'], 'affiliations': [{'raw_affiliation_string': 'Department of Soil Science, School of Agriculture, College of Basic and Applied Sciences, University of Ghana, Legon, Accra, Ghana', 'institution_ids': ['https://openalex.org/I138690464']}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5054971382', 'display_name': 'Bright S. Freduah', 'orcid': 'https://orcid.org/0000-0002-4147-0485'}, 'institutions': [{'id': 'https://openalex.org/I138690464', 'display_name': 'University of Ghana', 'ror': 'https://ror.org/01r22mr83', 'country_code': 'GH', 'type': 'education', 'lineage': ['https://openalex.org/I138690464']}], 'countries': ['GH'], 'is_corresponding': False, 'raw_author_name': 'Bright S Freduah', 'raw_affiliation_strings': ['Soil and Irrigation Research Centre, School of Agriculture, College of Basic and Applied Sciences, University of Ghana, Kpong, Ghana'], 'affiliations': [{'raw_affiliation_string': 'Soil and Irrigation Research Centre, School of Agriculture, College of Basic and Applied Sciences, University of Ghana, Kpong, Ghana', 'institution_ids': ['https://openalex.org/I138690464']}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5049005337', 'display_name': 'Alpha Y. Kamara', 'orcid': 'https://orcid.org/0000-0002-1844-2574'}, 'institutions': [{'id': 'https://openalex.org/I4210122440', 'display_name': 'International Institute of Tropical Agriculture', 'ror': 'https://ror.org/02smred28', 'country_code': 'NG', 'type': 'nonprofit', 'lineage': ['https://openalex.org/I4210122440']}], 'countries': ['NG'], 'is_corresponding': False, 'raw_author_name': 'Alpha Y Kamara', 'raw_affiliation_strings': ['International Institute of Tropical Agriculture, Kano, Nigeria'], 'affiliations': [{'raw_affiliation_string': 'International Institute of Tropical Agriculture, Kano, Nigeria', 'institution_ids': ['https://openalex.org/I4210122440']}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5075189646', 'display_name': 'Stephen Narh', 'orcid': None}, 'institutions': [{'id': 'https://openalex.org/I138690464', 'display_name': 'University of Ghana', 'ror': 'https://ror.org/01r22mr83', 'country_code': 'GH', 'type': 'education', 'lineage': ['https://openalex.org/I138690464']}], 'countries': ['GH'], 'is_corresponding': False, 'raw_author_name': 'Stephen Narh', 'raw_affiliation_strings': ['Soil and Irrigation Research Centre, School of Agriculture, College of Basic and Applied Sciences, University of Ghana, Kpong, Ghana'], 'affiliations': [{'raw_affiliation_string': 'Soil and Irrigation Research Centre, School of Agriculture, College of Basic and Applied Sciences, University of Ghana, Kpong, Ghana', 'institution_ids': ['https://openalex.org/I138690464']}]}, {'author_position': 'last', 'author': {'id': 'https://openalex.org/A5080282938', 'display_name': 'Alhassan Lansah Abdulai', 'orcid': None}, 'institutions': [], 'countries': ['GH'], 'is_corresponding': False, 'raw_author_name': 'Alhassan L Abdulai', 'raw_affiliation_strings': ['Savanna Agricultural Research Institute, Nyankpala, Tamale, Ghana'], 'affiliations': [{'raw_affiliation_string': 'Savanna Agricultural Research Institute, Nyankpala, Tamale, Ghana', 'institution_ids': []}]}], 'institution_assertions': [], 'countries_distinct_count': 2, 'institutions_distinct_count': 2, 'corresponding_author_ids': ['https://openalex.org/A5035858555'], 'corresponding_institution_ids': ['https://openalex.org/I138690464'], 'apc_list': None, 'apc_paid': None, 'fwci': 1.088, 'has_fulltext': True, 'fulltext_origin': 'ngrams', 'cited_by_count': 18, 'citation_normalized_percentile': {'value': 0.907053, 'is_in_top_1_percent': False, 'is_in_top_10_percent': True}, 'cited_by_percentile_year': {'min': 90, 'max': 91}, 'biblio': {'volume': '35', 'issue': '2', 'first_page': '137', 'last_page': '147'}, 'is_retracted': False, 'is_paratext': False, 'primary_topic': {'id': 'https://openalex.org/T10439', 'display_name': 'Climate change impacts on agriculture', 'score': 0.9956, 'subfield': {'id': 'https://openalex.org/subfields/1105', 'display_name': 'Ecology, Evolution, Behavior and Systematics'}, 'field': {'id': 'https://openalex.org/fields/11', 'display_name': 'Agricultural and Biological Sciences'}, 'domain': {'id': 'https://openalex.org/domains/1', 'display_name': 'Life Sciences'}}, 'topics': [{'id': 'https://openalex.org/T10439', 'display_name': 'Climate change impacts on agriculture', 'score': 0.9956, 'subfield': {'id': 'https://openalex.org/subfields/1105', 'display_name': 'Ecology, Evolution, Behavior and Systematics'}, 'field': {'id': 'https://openalex.org/fields/11', 'display_name': 'Agricultural and Biological Sciences'}, 'domain': {'id': 'https://openalex.org/domains/1', 'display_name': 'Life Sciences'}}, {'id': 'https://openalex.org/T12045', 'display_name': 'Rice Cultivation and Yield Improvement', 'score': 0.9911, 'subfield': {'id': 'https://openalex.org/subfields/1110', 'display_name': 'Plant Science'}, 'field': {'id': 'https://openalex.org/fields/11', 'display_name': 'Agricultural and Biological Sciences'}, 'domain': {'id': 'https://openalex.org/domains/1', 'display_name': 'Life Sciences'}}, {'id': 'https://openalex.org/T12310', 'display_name': 'Crop Yield and Soil Fertility', 'score': 0.9841, 'subfield': {'id': 'https://openalex.org/subfields/1102', 'display_name': 'Agronomy and Crop Science'}, 'field': {'id': 'https://openalex.org/fields/11', 'display_name': 'Agricultural and Biological Sciences'}, 'domain': {'id': 'https://openalex.org/domains/1', 'display_name': 'Life Sciences'}}], 'keywords': [{'id': 'https://openalex.org/keywords/yield-gap', 'display_name': 'Yield gap', 'score': 0.9583179}, {'id': 'https://openalex.org/keywords/dssat', 'display_name': 'DSSAT', 'score': 0.8917764}], 'concepts': [{'id': 'https://openalex.org/C2778361644', 'wikidata': 'https://www.wikidata.org/wiki/Q8053545', 'display_name': 'Yield gap', 'level': 3, 'score': 0.9583179}, {'id': 'https://openalex.org/C2777399377', 'wikidata': 'https://www.wikidata.org/wiki/Q17073957', 'display_name': 'DSSAT', 'level': 3, 'score': 0.8917764}, {'id': 'https://openalex.org/C134121241', 'wikidata': 'https://www.wikidata.org/wiki/Q899301', 'display_name': 'Yield (engineering)', 'level': 2, 'score': 0.8794809}, {'id': 'https://openalex.org/C88862950', 'wikidata': 'https://www.wikidata.org/wiki/Q11453', 'display_name': 'Irrigation', 'level': 2, 'score': 0.70254636}, {'id': 'https://openalex.org/C6557445', 'wikidata': 'https://www.wikidata.org/wiki/Q173113', 'display_name': 'Agronomy', 'level': 1, 'score': 0.6162683}, {'id': 'https://openalex.org/C137580998', 'wikidata': 'https://www.wikidata.org/wiki/Q235352', 'display_name': 'Crop', 'level': 2, 'score': 0.47026974}, {'id': 'https://openalex.org/C126343540', 'wikidata': 'https://www.wikidata.org/wiki/Q889514', 'display_name': 'Crop yield', 'level': 2, 'score': 0.45675406}, {'id': 'https://openalex.org/C39432304', 'wikidata': 'https://www.wikidata.org/wiki/Q188847', 'display_name': 'Environmental science', 'level': 0, 'score': 0.44389516}, {'id': 'https://openalex.org/C88463610', 'wikidata': 'https://www.wikidata.org/wiki/Q194118', 'display_name': 'Agricultural engineering', 'level': 1, 'score': 0.3446261}, {'id': 'https://openalex.org/C86803240', 'wikidata': 'https://www.wikidata.org/wiki/Q420', 'display_name': 'Biology', 'level': 0, 'score': 0.12416071}, {'id': 'https://openalex.org/C192562407', 'wikidata': 'https://www.wikidata.org/wiki/Q228736', 'display_name': 'Materials science', 'level': 0, 'score': 0.11666617}, {'id': 'https://openalex.org/C127413603', 'wikidata': 'https://www.wikidata.org/wiki/Q11023', 'display_name': 'Engineering', 'level': 0, 'score': 0.084038615}, {'id': 'https://openalex.org/C191897082', 'wikidata': 'https://www.wikidata.org/wiki/Q11467', 'display_name': 'Metallurgy', 'level': 1, 'score': 0.0}], 'mesh': [], 'locations_count': 1, 'locations': [{'is_oa': True, 'landing_page_url': 'https://doi.org/10.1080/02571862.2017.1354407', 'pdf_url': 'https://www.tandfonline.com/doi/pdf/10.1080/02571862.2017.1354407?needAccess=true', 'source': {'id': 'https://openalex.org/S2764755494', 'display_name': 'South African Journal of Plant and Soil', 'issn_l': '0257-1862', 'issn': ['0257-1862', '2167-034X'], 'is_oa': False, 'is_in_doaj': False, 'is_core': False, 'host_organization': 'https://openalex.org/P4310320547', 'host_organization_name': 'Taylor & Francis', 'host_organization_lineage': ['https://openalex.org/P4310320547'], 'host_organization_lineage_names': ['Taylor & Francis'], 'type': 'journal'}, 'license': 'cc-by-nc-nd', 'license_id': 'https://openalex.org/licenses/cc-by-nc-nd', 'version': 'publishedVersion', 'is_accepted': True, 'is_published': True}], 'best_oa_location': {'is_oa': True, 'landing_page_url': 'https://doi.org/10.1080/02571862.2017.1354407', 'pdf_url': 'https://www.tandfonline.com/doi/pdf/10.1080/02571862.2017.1354407?needAccess=true', 'source': {'id': 'https://openalex.org/S2764755494', 'display_name': 'South African Journal of Plant and Soil', 'issn_l': '0257-1862', 'issn': ['0257-1862', '2167-034X'], 'is_oa': False, 'is_in_doaj': False, 'is_core': False, 'host_organization': 'https://openalex.org/P4310320547', 'host_organization_name': 'Taylor & Francis', 'host_organization_lineage': ['https://openalex.org/P4310320547'], 'host_organization_lineage_names': ['Taylor & Francis'], 'type': 'journal'}, 'license': 'cc-by-nc-nd', 'license_id': 'https://openalex.org/licenses/cc-by-nc-nd', 'version': 'publishedVersion', 'is_accepted': True, 'is_published': True}, 'sustainable_development_goals': [{'score': 0.64, 'display_name': 'Zero hunger', 'id': 'https://metadata.un.org/sdg/2'}], 'grants': [], 'datasets': [], 'versions': [], 'referenced_works_count': 29, 'referenced_works': ['https://openalex.org/W1876629935', 'https://openalex.org/W1970333364', 'https://openalex.org/W1982627164', 'https://openalex.org/W1989775798', 'https://openalex.org/W2015795971', 'https://openalex.org/W2019555005', 'https://openalex.org/W2022677568', 'https://openalex.org/W2026471702', 'https://openalex.org/W2055305190', 'https://openalex.org/W2055631747', 'https://openalex.org/W2073986017', 'https://openalex.org/W2082591752', 'https://openalex.org/W2088766741', 'https://openalex.org/W2101011098', 'https://openalex.org/W2101491539', 'https://openalex.org/W2107984857', 'https://openalex.org/W2111286455', 'https://openalex.org/W2112057004', 'https://openalex.org/W2118182941', 'https://openalex.org/W2125740993', 'https://openalex.org/W2158883105', 'https://openalex.org/W2159801914', 'https://openalex.org/W249363879', 'https://openalex.org/W2541611287', 'https://openalex.org/W2581928429', 'https://openalex.org/W272855418', 'https://openalex.org/W2968453199', 'https://openalex.org/W3314149', 'https://openalex.org/W67835865'], 'related_works': ['https://openalex.org/W4379055770', 'https://openalex.org/W4327738721', 'https://openalex.org/W4321196234', 'https://openalex.org/W3168540694', 'https://openalex.org/W3135313392', 'https://openalex.org/W2988748982', 'https://openalex.org/W2980587248', 'https://openalex.org/W2944544309', 'https://openalex.org/W2766386462', 'https://openalex.org/W2387209993'], 'abstract_inverted_index': {'The': [0, 27, 107, 152], 'yield': [1, 36, 44, 48, 54, 62, 108, 113, 135, 160, 173, 178], 'gap': [2, 109, 136, 179], 'and': [3, 56, 76, 88, 96, 99, 121, 126, 148, 165, 174, 183, 195], 'variability': [4], 'in': [5, 10, 13, 187], 'maize': [6, 38, 43, 53], 'under': [7, 119, 128, 142, 150], 'smallholder': [8], 'systems': [9], 'two': [11], 'agroecologies': [12], 'northern': [14], 'Ghana': [15], 'were': [16, 81], 'evaluated': [17], 'using': [18], 'a': [19], 'decision': [20], 'support': [21], 'system': [22], 'for': [23], 'agrotechnology': [24], 'transfer': [25], '(DSSAT).': [26], 'model': [28], 'was': [29, 71], 'used': [30], 'to': [31, 117, 123, 140, 145, 171, 189], 'assess': [32], '(1)': [33], 'the': [34, 84, 93, 104, 134, 159, 169, 177], 'potential': [35, 112, 170], 'of': [37, 68, 154], '(YPOT),': [39], '(2)': [40], 'water-limited': [41, 131], 'exploitable': [42, 132], '(YWEX),': [45], '(3)': [46], 'nitrogen-limited': [47], '(YNI),': [49], '(4)': [50], 'farmer': [51, 64], 'practice': [52], '(YCFP)': [55], '(5)': [57], 'proposed': [58], 'enhanced': [59], 'nutrient': [60], 'use': [61, 153, 164], '(enhanced': [63], 'practice;': [65], 'YEFP).': [66], 'Effect': [67], 'supplementary': [69, 155, 166], 'irrigation': [70, 156, 167], 'also': [72], 'assessed': [73], 'on': [74, 92, 103, 111], 'YCFP': [75, 89, 100], 'YEFP': [77, 91, 102], 'conditions.': [78], 'Yield': [79], 'gaps': [80], 'determined': [82], 'as': [83], 'difference': [85], 'between': [86, 97, 124, 146], 'YPOT': [87], 'or': [90, 101], 'one': [94], 'hand,': [95], 'YWEX': [98], 'other': [105], 'hand.': [106], 'based': [110], 'ranged': [114, 137], 'from': [115, 138], '59%': [116, 127], '75%': [118], 'CFP': [120], 'narrowed': [122], '29%': [125], 'EFP.': [129, 151], 'With': [130], 'yields,': [133], '53%': [139], '65%': [141], 'CFP,': [143], 'reducing': [144], '22%': [147], '42%': [149], 'further': [157], 'reduced': [158], 'gap.': [161], 'Improved': [162], 'fertiliser': [163], 'have': [168], 'increase': [172], 'hence': [175], 'reduce': [176], 'if': [180], 'effective': [181], 'policies': [182], 'institutional': [184], 'structures': [185], 'are': [186], 'place': [188], 'provide': [190], 'farmers': [191], 'with': [192], 'credit': [193], 'facilities': [194], 'farm': [196], 'inputs.': [197]}, 'cited_by_api_url': 'https://api.openalex.org/works?filter=cites:W2766386462', 'counts_by_year': [{'year': 2024, 'cited_by_count': 4}, {'year': 2023, 'cited_by_count': 1}, {'year': 2022, 'cited_by_count': 6}, {'year': 2021, 'cited_by_count': 2}, {'year': 2020, 'cited_by_count': 2}, {'year': 2019, 'cited_by_count': 2}, {'year': 2018, 'cited_by_count': 1}], 'updated_date': '2025-01-11T04:08:19.507344', 'created_date': '2017-11-10'}