{"id":"https://openalex.org/A5089385083","orcid":null,"observed_orcids":[],"display_name":"M B Nainggolan","raw_author_names":["M B Nainggolan"],"full_name":"M B Nainggolan","works_count":1,"cited_by_count":5,"summary_stats":{"2yr_mean_citedness":0.0,"h_index":1,"i10_index":0},"ids":{"openalex":"https://openalex.org/A5089385083","orcid":null,"observed_orcids":[]},"affiliations":[{"institution":{"id":"https://openalex.org/I254887060","ror":"https://ror.org/01kknrc90","display_name":"Universitas Sumatera Utara","country_code":"ID","type":"education","lineage":["https://openalex.org/I254887060"]},"years":[2022]}],"last_known_institutions":[{"id":"https://openalex.org/I254887060","ror":"https://ror.org/01kknrc90","display_name":"Universitas Sumatera Utara","country_code":"ID","type":"education","lineage":["https://openalex.org/I254887060"]}],"topics":[{"id":"https://openalex.org/T11404","display_name":"Irrigation Practices and Water Management","count":1,"subfield":{"id":"https://openalex.org/subfields/1111","display_name":"Soil 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/T12710","display_name":"Engineering and Agricultural Innovations","count":1,"subfield":{"id":"https://openalex.org/subfields/2312","display_name":"Water Science and Technology"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12754","display_name":"Plant Growth and Agriculture Techniques","count":1,"subfield":{"id":"https://openalex.org/subfields/1111","display_name":"Soil 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"}}],"topic_share":[{"id":"https://openalex.org/T12710","display_name":"Engineering and Agricultural Innovations","value":6.9e-06,"subfield":{"id":"https://openalex.org/subfields/2312","display_name":"Water Science and Technology"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11404","display_name":"Irrigation Practices and Water Management","value":3.3e-06,"subfield":{"id":"https://openalex.org/subfields/1111","display_name":"Soil 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/T12754","display_name":"Plant Growth and Agriculture Techniques","value":1.5e-06,"subfield":{"id":"https://openalex.org/subfields/1111","display_name":"Soil 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"}}],"x_concepts":[{"id":"134121241","wikidata":"https://www.wikidata.org/wiki/Q899301","display_name":"Yield (engineering)","score":0.6530891060829163},{"id":"144027150","wikidata":"https://www.wikidata.org/wiki/Q48803","display_name":"Horticulture","score":0.4733448326587677},{"id":"162324750","wikidata":"https://www.wikidata.org/wiki/Q8134","display_name":"Economics","score":0.05911418795585632},{"id":"121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","score":0.0},{"id":"139719470","wikidata":"https://www.wikidata.org/wiki/Q39680","display_name":"Macroeconomics","score":0.0}],"counts_by_year":[{"year":2022,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":2024,"works_count":0,"oa_works_count":0,"cited_by_count":2},{"year":2025,"works_count":0,"oa_works_count":0,"cited_by_count":3}],"display_name_alternatives":["M B Nainggolan"],"block_key":"m nainggolan","works_api_url":"https://api.openalex.org/works?filter=author.id:A5089385083","awards_count":0,"awards_api_url":"https://api.openalex.org/awards?filter=investigators.author.id:A5089385083","updated_date":"2026-11-10T14:30:39","created_date":"2022-07-19T00:00:00"}