{"id":"https://openalex.org/A5110165497","orcid":null,"observed_orcids":[],"display_name":"John A. Shaffer","raw_author_names":["J. A. SHAFFER","J. A. Shaffer","J.A Shaffer","J.A. Shaffer","JOHN A. SHAFFER","John A Shaffer","John A. Shaffer"],"full_name":"Shaffer, John A.","works_count":32,"cited_by_count":729,"summary_stats":{"2yr_mean_citedness":0.0,"h_index":15,"i10_index":25},"ids":{"openalex":"https://openalex.org/A5110165497","orcid":null,"observed_orcids":[]},"affiliations":[{"institution":{"id":"https://openalex.org/I130769515","ror":"https://ror.org/04p491231","display_name":"Pennsylvania State University","country_code":"US","type":"education","lineage":["https://openalex.org/I130769515"]},"years":[2013,2002,1996,1990]},{"institution":{"id":"https://openalex.org/I1312222531","ror":"https://ror.org/02d2m2044","display_name":"Agricultural Research Service","country_code":"US","type":"government","lineage":["https://openalex.org/I1312222531","https://openalex.org/I1336096307"]},"years":[1999,1997,1996,1995,1994,1993,1991,1990,1988,1987,1986]},{"institution":{"id":"https://openalex.org/I1336096307","ror":"https://ror.org/01na82s61","display_name":"United States Department of Agriculture","country_code":"US","type":"government","lineage":["https://openalex.org/I1336096307"]},"years":[1995,1994,1991,1990,1987]}],"last_known_institutions":[{"id":"https://openalex.org/I130769515","ror":"https://ror.org/04p491231","display_name":"Pennsylvania State University","country_code":"US","type":"education","lineage":["https://openalex.org/I130769515"]}],"topics":[{"id":"https://openalex.org/T13591","display_name":"Pasture and Agricultural Systems","count":20,"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"}},{"id":"https://openalex.org/T13628","display_name":"Agricultural Productivity and Crop Improvement","count":15,"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"}},{"id":"https://openalex.org/T10004","display_name":"Soil Carbon and Nitrogen Dynamics","count":5,"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/T10098","display_name":"Ruminant Nutrition and Digestive Physiology","count":5,"subfield":{"id":"https://openalex.org/subfields/1103","display_name":"Animal Science and Zoology"},"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/T12003","display_name":"Bioenergy crop production and management","count":5,"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"}}],"topic_share":[{"id":"https://openalex.org/T13591","display_name":"Pasture and Agricultural Systems","value":0.0001018,"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"}},{"id":"https://openalex.org/T12003","display_name":"Bioenergy crop production and management","value":7.06e-05,"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"}},{"id":"https://openalex.org/T12822","display_name":"Turfgrass Adaptation and Management","value":4.16e-05,"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"}},{"id":"https://openalex.org/T12566","display_name":"Nitrogen and Sulfur Effects on Brassica","value":4.15e-05,"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"}},{"id":"https://openalex.org/T13628","display_name":"Agricultural Productivity and Crop Improvement","value":3.67e-05,"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"}}],"x_concepts":[{"id":"2779370140","wikidata":"https://www.wikidata.org/wiki/Q13377214","display_name":"Forage","score":0.8346902132034302},{"id":"6557445","wikidata":"https://www.wikidata.org/wiki/Q173113","display_name":"Agronomy","score":0.8228943347930908},{"id":"159750122","wikidata":"https://www.wikidata.org/wiki/Q96621023","display_name":"Soil water","score":0.8037289381027222},{"id":"86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","score":0.7614924311637878},{"id":"18903297","wikidata":"https://www.wikidata.org/wiki/Q7150","display_name":"Ecology","score":0.3317719101905823}],"counts_by_year":[{"year":1985,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1986,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1987,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1988,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":1990,"works_count":4,"oa_works_count":0,"cited_by_count":0},{"year":1991,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":1993,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1994,"works_count":3,"oa_works_count":1,"cited_by_count":0},{"year":1995,"works_count":4,"oa_works_count":0,"cited_by_count":0},{"year":1996,"works_count":4,"oa_works_count":0,"cited_by_count":0},{"year":1997,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1999,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2000,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2002,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2012,"works_count":0,"oa_works_count":0,"cited_by_count":37},{"year":2013,"works_count":1,"oa_works_count":0,"cited_by_count":34},{"year":2014,"works_count":0,"oa_works_count":0,"cited_by_count":21},{"year":2015,"works_count":0,"oa_works_count":0,"cited_by_count":26},{"year":2016,"works_count":0,"oa_works_count":0,"cited_by_count":21},{"year":2017,"works_count":0,"oa_works_count":0,"cited_by_count":21},{"year":2018,"works_count":0,"oa_works_count":0,"cited_by_count":27},{"year":2019,"works_count":0,"oa_works_count":0,"cited_by_count":15},{"year":2020,"works_count":0,"oa_works_count":0,"cited_by_count":25},{"year":2021,"works_count":0,"oa_works_count":0,"cited_by_count":25},{"year":2022,"works_count":0,"oa_works_count":0,"cited_by_count":19},{"year":2023,"works_count":0,"oa_works_count":0,"cited_by_count":10},{"year":2024,"works_count":0,"oa_works_count":0,"cited_by_count":10},{"year":2025,"works_count":0,"oa_works_count":0,"cited_by_count":11},{"year":2026,"works_count":0,"oa_works_count":0,"cited_by_count":9}],"display_name_alternatives":["J. A. SHAFFER","J. A. Shaffer","J.A Shaffer","J.A. Shaffer","JOHN A. SHAFFER","John A Shaffer","John A. Shaffer"],"block_key":"j shaffer","works_api_url":"https://api.openalex.org/works?filter=author.id:A5110165497","updated_date":"2026-11-07T12:08:38","created_date":"2016-06-24T00:00:00"}
