Get quick answers to your questions about the article from our AI researcher chatbot
{'id': 'https://openalex.org/W2182556028', 'doi': None, 'title': 'The problem of perennial cereal crops in the farming system based on grass rotations.', 'display_name': 'The problem of perennial cereal crops in the farming system based on grass rotations.', 'publication_year': 1940, 'publication_date': '1940-01-01', 'ids': {'openalex': 'https://openalex.org/W2182556028', 'mag': '2182556028'}, 'language': 'en', 'primary_location': {'is_oa': False, 'landing_page_url': 'https://www.cabdirect.org/cabdirect/abstract/19430701668', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S4306530507', 'display_name': 'Sovetskaya Agronomiya', 'issn_l': None, 'issn': None, 'is_oa': False, 'is_in_doaj': False, 'is_core': False, 'host_organization': None, 'host_organization_name': None, 'host_organization_lineage': [], 'host_organization_lineage_names': [], 'type': 'journal'}, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}, 'type': 'article', 'type_crossref': 'journal-article', 'indexed_in': [], '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/A5011816934', 'display_name': 'I. F. Dneprovskii', 'orcid': None}, 'institutions': [], 'countries': [], 'is_corresponding': True, 'raw_author_name': 'I. F. Dneprovskii', 'raw_affiliation_strings': [], 'affiliations': []}], 'institution_assertions': [], 'countries_distinct_count': 0, 'institutions_distinct_count': 0, 'corresponding_author_ids': ['https://openalex.org/A5011816934'], 'corresponding_institution_ids': [], 'apc_list': None, 'apc_paid': None, 'fwci': 0.0, 'has_fulltext': False, 'cited_by_count': 0, 'citation_normalized_percentile': {'value': 0.0, 'is_in_top_1_percent': False, 'is_in_top_10_percent': False}, 'cited_by_percentile_year': {'min': 0, 'max': 71}, 'biblio': {'volume': None, 'issue': None, 'first_page': None, 'last_page': None}, 'is_retracted': False, 'is_paratext': False, 'primary_topic': {'id': 'https://openalex.org/T14018', 'display_name': 'Agricultural Science and Technology', 'score': 0.9941, 'subfield': {'id': 'https://openalex.org/subfields/1100', 'display_name': 'General Agricultural and Biological Sciences'}, '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/T14018', 'display_name': 'Agricultural Science and Technology', 'score': 0.9941, 'subfield': {'id': 'https://openalex.org/subfields/1100', 'display_name': 'General Agricultural and Biological Sciences'}, '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/T13246', 'display_name': 'Effective Microorganisms in Agriculture', 'score': 0.9936, '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/T12618', 'display_name': 'Diversity and Conservation of Vascular Plants in Central Europe', 'score': 0.9913, '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'}}], 'keywords': [{'id': 'https://openalex.org/keywords/crop-productivity', 'display_name': 'Crop Productivity', 'score': 0.550818}, {'id': 'https://openalex.org/keywords/vegetation', 'display_name': 'Vegetation', 'score': 0.534696}, {'id': 'https://openalex.org/keywords/soil-fertility', 'display_name': 'Soil Fertility', 'score': 0.527533}, {'id': 'https://openalex.org/keywords/sustainable-farming', 'display_name': 'Sustainable Farming', 'score': 0.519467}, {'id': 'https://openalex.org/keywords/plant-growth', 'display_name': 'Plant Growth', 'score': 0.512588}], 'concepts': [{'id': 'https://openalex.org/C6557445', 'wikidata': 'https://www.wikidata.org/wiki/Q173113', 'display_name': 'Agronomy', 'level': 1, 'score': 0.7015965}, {'id': 'https://openalex.org/C24461792', 'wikidata': 'https://www.wikidata.org/wiki/Q157957', 'display_name': 'Perennial plant', 'level': 2, 'score': 0.6338256}, {'id': 'https://openalex.org/C118518473', 'wikidata': 'https://www.wikidata.org/wiki/Q11451', 'display_name': 'Agriculture', 'level': 2, 'score': 0.4823572}, {'id': 'https://openalex.org/C54286561', 'wikidata': 'https://www.wikidata.org/wiki/Q397350', 'display_name': 'Agroforestry', 'level': 1, 'score': 0.44276026}, {'id': 'https://openalex.org/C86803240', 'wikidata': 'https://www.wikidata.org/wiki/Q420', 'display_name': 'Biology', 'level': 0, 'score': 0.24321213}, {'id': 'https://openalex.org/C18903297', 'wikidata': 'https://www.wikidata.org/wiki/Q7150', 'display_name': 'Ecology', 'level': 1, 'score': 0.06499973}], 'mesh': [], 'locations_count': 1, 'locations': [{'is_oa': False, 'landing_page_url': 'https://www.cabdirect.org/cabdirect/abstract/19430701668', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S4306530507', 'display_name': 'Sovetskaya Agronomiya', 'issn_l': None, 'issn': None, 'is_oa': False, 'is_in_doaj': False, 'is_core': False, 'host_organization': None, 'host_organization_name': None, 'host_organization_lineage': [], 'host_organization_lineage_names': [], 'type': 'journal'}, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}], 'best_oa_location': None, 'sustainable_development_goals': [{'score': 0.81, 'id': 'https://metadata.un.org/sdg/2', 'display_name': 'Zero hunger'}], 'grants': [], 'datasets': [], 'versions': [], 'referenced_works_count': 0, 'referenced_works': [], 'related_works': ['https://openalex.org/W929206615', 'https://openalex.org/W659011237', 'https://openalex.org/W592526025', 'https://openalex.org/W382231165', 'https://openalex.org/W345379217', 'https://openalex.org/W335018705', 'https://openalex.org/W272915907', 'https://openalex.org/W2601275104', 'https://openalex.org/W2594149868', 'https://openalex.org/W2560407741', 'https://openalex.org/W2553669006', 'https://openalex.org/W2546863867', 'https://openalex.org/W2499547103', 'https://openalex.org/W2240897943', 'https://openalex.org/W2217525028', 'https://openalex.org/W219193971', 'https://openalex.org/W2101836759', 'https://openalex.org/W1875107986', 'https://openalex.org/W1791811511', 'https://openalex.org/W1581977330'], 'abstract_inverted_index': None, 'cited_by_api_url': 'https://api.openalex.org/works?filter=cites:W2182556028', 'counts_by_year': [], 'updated_date': '2024-09-16T03:53:03.817386', 'created_date': '2016-06-24'}