{"id":"https://openalex.org/W2017084445","doi":"https://doi.org/10.2134/jpa1988.0313","title":"Fertilizer N Equivalence of Alfalfa, Birdsfoot Trefoil, and Red Clover for Succeeding Corn Crops","display_name":"Fertilizer N Equivalence of Alfalfa, Birdsfoot Trefoil, and Red Clover for Succeeding Corn Crops","publication_year":1988,"publication_date":"1988-10-01","ids":{"openalex":"https://openalex.org/W2017084445","doi":"https://doi.org/10.2134/jpa1988.0313","mag":"2017084445"},"language":"en","primary_location":{"id":"doi:10.2134/jpa1988.0313","doi":"https://doi.org/10.2134/jpa1988.0313","is_oa":false,"landing_page_url":"https://doi.org/10.2134/jpa1988.0313","pdf_url":null,"source":{"id":"https://openalex.org/S125600968","display_name":"jpa","issn_l":"0890-8524","issn":["0890-8524","2689-4114"],"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/P4310320595","host_organization_name":"Wiley","host_organization_lineage":["https://openalex.org/P4310320595"],"host_organization_lineage_names":["Wiley"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal of Production Agriculture","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5112808795","display_name":"Richard H. Fox","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I130769515","display_name":"Pennsylvania State University","ror":"https://ror.org/04p491231","country_code":"US","type":"education","lineage":["https://openalex.org/I130769515"]}],"countries":["US"],"is_corresponding":true,"raw_author_name":"R. H. Fox","raw_affiliation_strings":["Dep. of Agronomy; Penn. State Univ.; University Park PA 16802"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Dep. of Agronomy; Penn. State Univ.; University Park PA 16802","institution_ids":["https://openalex.org/I130769515"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5089850021","display_name":"William P. Piekielek","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I130769515","display_name":"Pennsylvania State University","ror":"https://ror.org/04p491231","country_code":"US","type":"education","lineage":["https://openalex.org/I130769515"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"W. P. Piekielek","raw_affiliation_strings":["Dep. of Agronomy; Penn. State Univ.; University Park PA 16802"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Dep. of Agronomy; Penn. State Univ.; University Park PA 16802","institution_ids":["https://openalex.org/I130769515"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5112808795"],"corresponding_institution_ids":["https://openalex.org/I130769515"],"apc_list":null,"apc_paid":null,"fwci":9.141,"has_fulltext":false,"cited_by_count":94,"citation_normalized_percentile":{"value":0.97809879,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":88,"max":98},"biblio":{"volume":"1","issue":"4","first_page":"313","last_page":"317"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T12436","display_name":"Agronomic Practices and Intercropping Systems","score":0.4884999990463257,"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"}},"topics":[{"id":"https://openalex.org/T12436","display_name":"Agronomic Practices and Intercropping Systems","score":0.4884999990463257,"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/T12294","display_name":"Agricultural Science and Fertilization","score":0.3043999969959259,"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/T12310","display_name":"Crop Yield and Soil Fertility","score":0.18310000002384186,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/alfalfa","display_name":"alfalfa","score":0.7519999742507935},{"id":"https://openalex.org/keywords/lotus-corniculatus","display_name":"Lotus corniculatus","score":0.9959999918937683},{"id":"https://openalex.org/keywords/red-clover","display_name":"red clover","score":1.0},{"id":"https://openalex.org/keywords/forage-legume","display_name":"forage legumes","score":0.8159999847412109},{"id":"https://openalex.org/keywords/maize-yield","display_name":"maize yield","score":0.5540000200271606},{"id":"https://openalex.org/keywords/residual-nitrogen","display_name":"residual nitrogen","score":0.7940000295639038},{"id":"https://openalex.org/keywords/crop-rotation","display_name":"crop rotation","score":0.8690000176429749},{"id":"https://openalex.org/keywords/nitrogen-fertilization","display_name":"nitrogen fertilization","score":0.46399998664855957},{"id":"https://openalex.org/keywords/maize","display_name":"maize","score":0.7300000190734863}],"concepts":[{"id":"https://openalex.org/C2778534543","wikidata":"https://www.wikidata.org/wiki/Q29907","display_name":"Lotus corniculatus","level":2,"score":0.9382034540176392},{"id":"https://openalex.org/C2776702220","wikidata":"https://www.wikidata.org/wiki/Q156635","display_name":"Red Clover","level":2,"score":0.9092477560043335},{"id":"https://openalex.org/C6557445","wikidata":"https://www.wikidata.org/wiki/Q173113","display_name":"Agronomy","level":1,"score":0.760563313961029},{"id":"https://openalex.org/C2776971509","wikidata":"https://www.wikidata.org/wiki/Q905612","display_name":"Trefoil","level":2,"score":0.688232958316803},{"id":"https://openalex.org/C2779370140","wikidata":"https://www.wikidata.org/wiki/Q13377214","display_name":"Forage","level":2,"score":0.6730590462684631},{"id":"https://openalex.org/C2780560099","wikidata":"https://www.wikidata.org/wiki/Q83323","display_name":"Fertilizer","level":2,"score":0.623120903968811},{"id":"https://openalex.org/C2776632002","wikidata":"https://www.wikidata.org/wiki/Q145909","display_name":"Legume","level":2,"score":0.6119770407676697},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.5554969310760498},{"id":"https://openalex.org/C175760724","wikidata":"https://www.wikidata.org/wiki/Q191258","display_name":"Crop rotation","level":3,"score":0.5353538990020752},{"id":"https://openalex.org/C513193947","wikidata":"https://www.wikidata.org/wiki/Q211439","display_name":"Fodder","level":2,"score":0.5081079006195068},{"id":"https://openalex.org/C106191032","wikidata":"https://www.wikidata.org/wiki/Q336989","display_name":"Hay","level":2,"score":0.49916720390319824},{"id":"https://openalex.org/C2992847057","wikidata":"https://www.wikidata.org/wiki/Q156106","display_name":"Medicago sativa","level":2,"score":0.49228420853614807},{"id":"https://openalex.org/C137580998","wikidata":"https://www.wikidata.org/wiki/Q235352","display_name":"Crop","level":2,"score":0.3747093677520752}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.2134/jpa1988.0313","doi":"https://doi.org/10.2134/jpa1988.0313","is_oa":false,"landing_page_url":"https://doi.org/10.2134/jpa1988.0313","pdf_url":null,"source":{"id":"https://openalex.org/S125600968","display_name":"jpa","issn_l":"0890-8524","issn":["0890-8524","2689-4114"],"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/P4310320595","host_organization_name":"Wiley","host_organization_lineage":["https://openalex.org/P4310320595"],"host_organization_lineage_names":["Wiley"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal of Production Agriculture","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[{"score":0.991100013256073,"id":"https://metadata.un.org/sdg/2","display_name":"Zero hunger"}],"study_designs":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":17,"referenced_works":["https://openalex.org/W1558402861","https://openalex.org/W1976063806","https://openalex.org/W1982835226","https://openalex.org/W1985888594","https://openalex.org/W1989208619","https://openalex.org/W2011255064","https://openalex.org/W2060831912","https://openalex.org/W2063128098","https://openalex.org/W2067660461","https://openalex.org/W2088498729","https://openalex.org/W2142604910","https://openalex.org/W2183431762","https://openalex.org/W2288482740","https://openalex.org/W2462885695","https://openalex.org/W3083924871","https://openalex.org/W4253066829","https://openalex.org/W6718772771"],"related_works":["https://openalex.org/W2067660461","https://openalex.org/W4685634","https://openalex.org/W7162904928","https://openalex.org/W2070547653","https://openalex.org/W2900628051","https://openalex.org/W1981181972","https://openalex.org/W1999301160","https://openalex.org/W4413458739","https://openalex.org/W2012867440","https://openalex.org/W1989208619"],"abstract_inverted_index":{"A":[0],"6\u2010yr":[1],"field":[2],"experiment":[3],"was":[4,70],"conducted":[5],"in":[6],"central":[7],"Pennsylvania":[8],"to":[9,24,76,101,150,154,160],"determine":[10],"the":[11,38,85,115,118,122,135],"fertilizer":[12,78,90],"N":[13,77,91,157],"equivalent":[14],"value":[15],"of":[16,27,37,43,51,62,84,93,143],"three":[17,136],"forage":[18,35],"legumes":[19,144],"managed":[20],"as":[21],"hay":[22],"prior":[23],"3":[25,41,49],"yr":[26,42,50,61],"succeeding":[28],"corn":[29,81,147],"(":[30,45,54,65],"Zea":[31],"mays":[32],"L.).":[33,68],"The":[34,87,108,140],"component":[36],"rotations":[39],"were":[40,99],"alfalfa":[44,125],"Medicago":[46],"sativa":[47],"L.),":[48],"birdsfoot":[52],"trefoil":[53],"Lotus":[55],"corniculatus":[56],"L.)":[57],"(BFT),":[58],"and":[59,96,104,120,126,129,132],"2":[60],"red":[63,97,127],"clover":[64,98],"Trifolium":[66],"pretense":[67],"There":[69],"no":[71],"significant":[72],"grain":[73],"yield":[74],"response":[75],"for":[79,124,134],"first\u2010year":[80],"following":[82],"any":[83],"legumes.":[86],"3\u2010yr":[88],"total":[89],"equivalences":[92],"alfalfa,":[94],"BFT,":[95],"estimated":[100],"be":[102,151],"167,151,":[103],"131":[105],"lb/acre,":[106],"respectively.":[107],"proportion":[109],"contributed":[110],"each":[111],"year":[112],"averaged":[113],"70%":[114],"first,":[116],"20%":[117],"second,":[119],"10%":[121],"third":[123],"clover,":[128],"55%,":[130],"30%,":[131],"15%":[133],"years":[137],"with":[138],"BFT.":[139],"beneficial":[141],"effect":[142],"on":[145],"subsequent":[146],"yields":[148],"appeared":[149],"due":[152],"primarily":[153],"their":[155],"residual":[156],"rather":[158],"than":[159],"a":[161],"crop":[162],"sequence":[163],"or":[164],"rotation":[165],"effect.":[166]},"counts_by_year":[{"year":2024,"cited_by_count":1},{"year":2022,"cited_by_count":1},{"year":2021,"cited_by_count":1},{"year":2019,"cited_by_count":4},{"year":2018,"cited_by_count":1},{"year":2017,"cited_by_count":2},{"year":2015,"cited_by_count":5},{"year":2014,"cited_by_count":3},{"year":2013,"cited_by_count":6},{"year":2012,"cited_by_count":5}],"updated_date":"2026-11-10T11:39:43.021295","created_date":"2016-06-24T00:00:00"}