{"id":"https://openalex.org/A5006952166","orcid":null,"observed_orcids":[],"display_name":"A.J. Havinga","raw_author_names":["A. J. Havinga","A.J. Havinga"],"full_name":"A. J. Havinga","works_count":20,"cited_by_count":779,"summary_stats":{"2yr_mean_citedness":0.0,"h_index":8,"i10_index":8},"ids":{"openalex":"https://openalex.org/A5006952166","orcid":null,"observed_orcids":[]},"affiliations":[{"institution":{"id":"https://openalex.org/I913481162","ror":"https://ror.org/04qw24q55","display_name":"Wageningen University & Research","country_code":"NL","type":"education","lineage":["https://openalex.org/I913481162"]},"years":[1992,1972,1971,1968,1967]}],"last_known_institutions":null,"topics":[{"id":"https://openalex.org/T13102","display_name":"Soil and Environmental Studies","count":16,"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/T10017","display_name":"Geology and Paleoclimatology Research","count":12,"subfield":{"id":"https://openalex.org/subfields/1902","display_name":"Atmospheric Science"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12091","display_name":"Peatlands and Wetlands Ecology","count":5,"subfield":{"id":"https://openalex.org/subfields/2303","display_name":"Ecology"},"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/T10577","display_name":"Hydrology and Sediment Transport Processes","count":3,"subfield":{"id":"https://openalex.org/subfields/1904","display_name":"Earth-Surface Processes"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11927","display_name":"Plant Reproductive Biology","count":3,"subfield":{"id":"https://openalex.org/subfields/1312","display_name":"Molecular Biology"},"field":{"id":"https://openalex.org/fields/13","display_name":"Biochemistry, Genetics and Molecular Biology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}}],"topic_share":[{"id":"https://openalex.org/T13102","display_name":"Soil and Environmental Studies","value":5.88e-05,"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/T12091","display_name":"Peatlands and Wetlands Ecology","value":3.8e-05,"subfield":{"id":"https://openalex.org/subfields/2303","display_name":"Ecology"},"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/T12161","display_name":"Plant Surface Properties and Treatments","value":2.83e-05,"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/T11927","display_name":"Plant Reproductive Biology","value":2.06e-05,"subfield":{"id":"https://openalex.org/subfields/1312","display_name":"Molecular Biology"},"field":{"id":"https://openalex.org/fields/13","display_name":"Biochemistry, Genetics and Molecular Biology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T12383","display_name":"Aeolian processes and effects","value":1.78e-05,"subfield":{"id":"https://openalex.org/subfields/1904","display_name":"Earth-Surface Processes"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"x_concepts":[{"id":"2780618852","wikidata":"https://www.wikidata.org/wiki/Q79932","display_name":"Pollen","score":0.9437888264656067},{"id":"127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","score":0.6607546806335449},{"id":"59822182","wikidata":"https://www.wikidata.org/wiki/Q441","display_name":"Botany","score":0.6152966618537903},{"id":"86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","score":0.39950984716415405},{"id":"205649164","wikidata":"https://www.wikidata.org/wiki/Q1071","display_name":"Geography","score":0.38660627603530884}],"counts_by_year":[{"year":1962,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":1963,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":1967,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1968,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1969,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":1971,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1972,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1974,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":1979,"works_count":2,"oa_works_count":2,"cited_by_count":0},{"year":1980,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":1981,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":1982,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":1983,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":1984,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":1986,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":1990,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":1992,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":1993,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":2012,"works_count":0,"oa_works_count":0,"cited_by_count":22},{"year":2013,"works_count":0,"oa_works_count":0,"cited_by_count":19},{"year":2014,"works_count":0,"oa_works_count":0,"cited_by_count":30},{"year":2015,"works_count":0,"oa_works_count":0,"cited_by_count":28},{"year":2016,"works_count":0,"oa_works_count":0,"cited_by_count":27},{"year":2017,"works_count":0,"oa_works_count":0,"cited_by_count":35},{"year":2018,"works_count":0,"oa_works_count":0,"cited_by_count":21},{"year":2019,"works_count":0,"oa_works_count":0,"cited_by_count":28},{"year":2020,"works_count":0,"oa_works_count":0,"cited_by_count":28},{"year":2021,"works_count":0,"oa_works_count":0,"cited_by_count":22},{"year":2022,"works_count":0,"oa_works_count":0,"cited_by_count":16},{"year":2023,"works_count":0,"oa_works_count":0,"cited_by_count":14},{"year":2024,"works_count":0,"oa_works_count":0,"cited_by_count":26},{"year":2025,"works_count":0,"oa_works_count":0,"cited_by_count":22},{"year":2026,"works_count":0,"oa_works_count":0,"cited_by_count":8}],"display_name_alternatives":["A. J. Havinga","A.J. Havinga"],"block_key":"a havinga","works_api_url":"https://api.openalex.org/works?filter=author.id:A5006952166","updated_date":"2026-11-08T12:57:04","created_date":"2016-06-24T00:00:00"}