Get quick answers to your questions about the article from our AI researcher chatbot
{'id': 'https://openalex.org/W1994323942', 'doi': 'https://doi.org/10.1016/s0378-4290(98)00170-1', 'title': 'Duration of the grain-filling period in maize is not affected by photoperiod and incident PPFD during the vegetative phase', 'display_name': 'Duration of the grain-filling period in maize is not affected by photoperiod and incident PPFD during the vegetative phase', 'publication_year': 1999, 'publication_date': '1999-06-01', 'ids': {'openalex': 'https://openalex.org/W1994323942', 'doi': 'https://doi.org/10.1016/s0378-4290(98)00170-1', 'mag': '1994323942'}, 'language': 'en', 'primary_location': {'is_oa': False, 'landing_page_url': 'https://doi.org/10.1016/s0378-4290(98)00170-1', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S148071443', 'display_name': 'Field Crops Research', 'issn_l': '0378-4290', 'issn': ['0378-4290', '1872-6852'], 'is_oa': False, 'is_in_doaj': False, 'is_core': True, 'host_organization': 'https://openalex.org/P4310320990', 'host_organization_name': 'Elsevier BV', 'host_organization_lineage': ['https://openalex.org/P4310320990'], 'host_organization_lineage_names': ['Elsevier BV'], 'type': 'journal'}, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}, 'type': 'article', 'type_crossref': 'journal-article', 'indexed_in': ['crossref'], 'open_access': {'is_oa': False, 'oa_status': 'closed', 'oa_url': None, 'any_repository_has_fulltext': False}, 'authorships': [{'author_position': 'first', 'author': {'id': 'https://openalex.org/A5019577564', 'display_name': 'M. Tollenaar', 'orcid': None}, 'institutions': [{'id': 'https://openalex.org/I79817857', 'display_name': 'University of Guelph', 'ror': 'https://ror.org/01r7awg59', 'country_code': 'CA', 'type': 'education', 'lineage': ['https://openalex.org/I79817857']}], 'countries': ['CA'], 'is_corresponding': True, 'raw_author_name': 'M Tollenaar', 'raw_affiliation_strings': ['Department of Crop Science, University of Guelph, Guelph, Ont., Canada N1G 2W1'], 'affiliations': [{'raw_affiliation_string': 'Department of Crop Science, University of Guelph, Guelph, Ont., Canada N1G 2W1', 'institution_ids': ['https://openalex.org/I79817857']}]}], 'institution_assertions': [], 'countries_distinct_count': 1, 'institutions_distinct_count': 1, 'corresponding_author_ids': ['https://openalex.org/A5019577564'], 'corresponding_institution_ids': ['https://openalex.org/I79817857'], 'apc_list': {'value': 3970, 'currency': 'USD', 'value_usd': 3970, 'provenance': 'doaj'}, 'apc_paid': None, 'fwci': 4.868, 'has_fulltext': True, 'fulltext_origin': 'ngrams', 'cited_by_count': 45, 'citation_normalized_percentile': {'value': 0.92496, 'is_in_top_1_percent': False, 'is_in_top_10_percent': True}, 'cited_by_percentile_year': {'min': 91, 'max': 92}, 'biblio': {'volume': '62', 'issue': '1', 'first_page': '15', 'last_page': '21'}, 'is_retracted': False, 'is_paratext': False, 'primary_topic': {'id': 'https://openalex.org/T12310', 'display_name': 'Crop Yield and Soil Fertility', 'score': 0.995, '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'}}, 'topics': [{'id': 'https://openalex.org/T12310', 'display_name': 'Crop Yield and Soil Fertility', 'score': 0.995, '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/growing-season', 'display_name': 'Growing season', 'score': 0.46127224}], 'concepts': [{'id': 'https://openalex.org/C55969652', 'wikidata': 'https://www.wikidata.org/wiki/Q259028', 'display_name': 'photoperiodism', 'level': 2, 'score': 0.93206835}, {'id': 'https://openalex.org/C168741863', 'wikidata': 'https://www.wikidata.org/wiki/Q777671', 'display_name': 'Sowing', 'level': 2, 'score': 0.83582306}, {'id': 'https://openalex.org/C144027150', 'wikidata': 'https://www.wikidata.org/wiki/Q48803', 'display_name': 'Horticulture', 'level': 1, 'score': 0.5545079}, {'id': 'https://openalex.org/C86803240', 'wikidata': 'https://www.wikidata.org/wiki/Q420', 'display_name': 'Biology', 'level': 0, 'score': 0.5435957}, {'id': 'https://openalex.org/C6557445', 'wikidata': 'https://www.wikidata.org/wiki/Q173113', 'display_name': 'Agronomy', 'level': 1, 'score': 0.47075775}, {'id': 'https://openalex.org/C137660486', 'wikidata': 'https://www.wikidata.org/wiki/Q732240', 'display_name': 'Growing season', 'level': 2, 'score': 0.46127224}, {'id': 'https://openalex.org/C140793950', 'wikidata': 'https://www.wikidata.org/wiki/Q168091', 'display_name': 'Animal science', 'level': 1, 'score': 0.36083916}], 'mesh': [], 'locations_count': 1, 'locations': [{'is_oa': False, 'landing_page_url': 'https://doi.org/10.1016/s0378-4290(98)00170-1', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S148071443', 'display_name': 'Field Crops Research', 'issn_l': '0378-4290', 'issn': ['0378-4290', '1872-6852'], 'is_oa': False, 'is_in_doaj': False, 'is_core': True, 'host_organization': 'https://openalex.org/P4310320990', 'host_organization_name': 'Elsevier BV', 'host_organization_lineage': ['https://openalex.org/P4310320990'], 'host_organization_lineage_names': ['Elsevier BV'], 'type': 'journal'}, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}], 'best_oa_location': None, 'sustainable_development_goals': [{'display_name': 'Responsible consumption and production', 'id': 'https://metadata.un.org/sdg/12', 'score': 0.5}], 'grants': [], 'datasets': [], 'versions': [], 'referenced_works_count': 25, 'referenced_works': ['https://openalex.org/W1966511769', 'https://openalex.org/W1971342932', 'https://openalex.org/W1974386408', 'https://openalex.org/W1984333361', 'https://openalex.org/W1987364202', 'https://openalex.org/W1988174778', 'https://openalex.org/W1995240559', 'https://openalex.org/W2004702534', 'https://openalex.org/W2013374627', 'https://openalex.org/W2028100878', 'https://openalex.org/W2031332557', 'https://openalex.org/W2035021596', 'https://openalex.org/W2038603862', 'https://openalex.org/W2048487760', 'https://openalex.org/W2051914553', 'https://openalex.org/W2060117151', 'https://openalex.org/W2073141034', 'https://openalex.org/W2084922598', 'https://openalex.org/W2085562372', 'https://openalex.org/W2092713162', 'https://openalex.org/W2094705114', 'https://openalex.org/W2132729759', 'https://openalex.org/W2141847194', 'https://openalex.org/W3035841569', 'https://openalex.org/W4301420698'], 'related_works': ['https://openalex.org/W4239241264', 'https://openalex.org/W2796916782', 'https://openalex.org/W2773433063', 'https://openalex.org/W2392244106', 'https://openalex.org/W2372708613', 'https://openalex.org/W2186229317', 'https://openalex.org/W2008979034', 'https://openalex.org/W2001731508', 'https://openalex.org/W1992784449', 'https://openalex.org/W1967953863'], 'abstract_inverted_index': None, 'cited_by_api_url': 'https://api.openalex.org/works?filter=cites:W1994323942', 'counts_by_year': [{'year': 2024, 'cited_by_count': 1}, {'year': 2023, 'cited_by_count': 2}, {'year': 2022, 'cited_by_count': 1}, {'year': 2020, 'cited_by_count': 2}, {'year': 2019, 'cited_by_count': 2}, {'year': 2018, 'cited_by_count': 1}, {'year': 2016, 'cited_by_count': 1}, {'year': 2015, 'cited_by_count': 2}, {'year': 2014, 'cited_by_count': 8}, {'year': 2013, 'cited_by_count': 1}, {'year': 2012, 'cited_by_count': 1}], 'updated_date': '2025-01-05T12:19:57.829531', 'created_date': '2016-06-24'}