{"id":"https://openalex.org/A5113789023","orcid":null,"observed_orcids":[],"display_name":"Roger Hartmann","raw_author_names":["Hartmann, Roger","Roger Hartmann"],"full_name":"Roger Hartmann","works_count":46,"cited_by_count":1221,"summary_stats":{"2yr_mean_citedness":0.0,"h_index":12,"i10_index":13},"ids":{"openalex":"https://openalex.org/A5113789023","orcid":null,"observed_orcids":[]},"affiliations":[{"institution":{"id":"https://openalex.org/I32597200","ror":"https://ror.org/00cv9y106","display_name":"Ghent University","country_code":"BE","type":"education","lineage":["https://openalex.org/I32597200"]},"years":[2007,2006,2005,2004,2003,2001]},{"institution":{"id":"https://openalex.org/I79817857","ror":"https://ror.org/01r7awg59","display_name":"University of Guelph","country_code":"CA","type":"education","lineage":["https://openalex.org/I79817857"]},"years":[2007]}],"last_known_institutions":[{"id":"https://openalex.org/I32597200","ror":"https://ror.org/00cv9y106","display_name":"Ghent University","country_code":"BE","type":"education","lineage":["https://openalex.org/I32597200"]},{"id":"https://openalex.org/I79817857","ror":"https://ror.org/01r7awg59","display_name":"University of Guelph","country_code":"CA","type":"education","lineage":["https://openalex.org/I79817857"]}],"topics":[{"id":"https://openalex.org/T10716","display_name":"Soil and Unsaturated Flow","count":17,"subfield":{"id":"https://openalex.org/subfields/2205","display_name":"Civil and Structural Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12792","display_name":"Soil Management and Crop Yield","count":17,"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/T10889","display_name":"Soil erosion and sediment transport","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/T12383","display_name":"Aeolian processes and effects","count":7,"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/T11311","display_name":"Soil and Water Nutrient Dynamics","count":6,"subfield":{"id":"https://openalex.org/subfields/2304","display_name":"Environmental Chemistry"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"topic_share":[{"id":"https://openalex.org/T12383","display_name":"Aeolian processes and effects","value":6.21e-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"}},{"id":"https://openalex.org/T12792","display_name":"Soil Management and Crop Yield","value":5.69e-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/T10716","display_name":"Soil and Unsaturated Flow","value":5.61e-05,"subfield":{"id":"https://openalex.org/subfields/2205","display_name":"Civil and Structural Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10889","display_name":"Soil erosion and sediment transport","value":5e-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/T10770","display_name":"Soil Geostatistics and Mapping","value":3.25e-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"}}],"x_concepts":[{"id":"39432304","wikidata":"https://www.wikidata.org/wiki/Q188847","display_name":"Environmental science","score":0.7480772137641907},{"id":"159750122","wikidata":"https://www.wikidata.org/wiki/Q96621023","display_name":"Soil water","score":0.653914213180542},{"id":"159390177","wikidata":"https://www.wikidata.org/wiki/Q9161265","display_name":"Soil science","score":0.6485841274261475},{"id":"127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","score":0.5965999960899353},{"id":"187320778","wikidata":"https://www.wikidata.org/wiki/Q1349130","display_name":"Geotechnical engineering","score":0.4072882831096649}],"counts_by_year":[{"year":1972,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1991,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1997,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1998,"works_count":7,"oa_works_count":0,"cited_by_count":0},{"year":1999,"works_count":4,"oa_works_count":0,"cited_by_count":0},{"year":2000,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2001,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":2002,"works_count":6,"oa_works_count":0,"cited_by_count":0},{"year":2003,"works_count":3,"oa_works_count":1,"cited_by_count":0},{"year":2004,"works_count":4,"oa_works_count":0,"cited_by_count":0},{"year":2005,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":2006,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2007,"works_count":10,"oa_works_count":1,"cited_by_count":0},{"year":2012,"works_count":0,"oa_works_count":0,"cited_by_count":48},{"year":2013,"works_count":0,"oa_works_count":0,"cited_by_count":54},{"year":2014,"works_count":0,"oa_works_count":0,"cited_by_count":64},{"year":2015,"works_count":0,"oa_works_count":0,"cited_by_count":67},{"year":2016,"works_count":0,"oa_works_count":0,"cited_by_count":62},{"year":2017,"works_count":0,"oa_works_count":0,"cited_by_count":46},{"year":2018,"works_count":0,"oa_works_count":0,"cited_by_count":53},{"year":2019,"works_count":0,"oa_works_count":0,"cited_by_count":83},{"year":2020,"works_count":0,"oa_works_count":0,"cited_by_count":75},{"year":2021,"works_count":0,"oa_works_count":0,"cited_by_count":87},{"year":2022,"works_count":0,"oa_works_count":0,"cited_by_count":66},{"year":2023,"works_count":0,"oa_works_count":0,"cited_by_count":49},{"year":2024,"works_count":0,"oa_works_count":0,"cited_by_count":47},{"year":2025,"works_count":0,"oa_works_count":0,"cited_by_count":36},{"year":2026,"works_count":0,"oa_works_count":0,"cited_by_count":34}],"display_name_alternatives":["Hartmann, Roger","Roger Hartmann"],"block_key":"r hartmann","works_api_url":"https://api.openalex.org/works?filter=author.id:A5113789023","awards_count":0,"awards_api_url":"https://api.openalex.org/awards?filter=investigators.author.id:A5113789023","updated_date":"2026-11-10T14:30:39","created_date":"2016-06-24T00:00:00"}