{"id":"https://openalex.org/W1999375437","doi":"https://doi.org/10.2136/sssaj1971.03615995003500040048x","title":"A Simple Statistical Procedure for Partitioning Soil Test Correlation Data Into Two Classes","display_name":"A Simple Statistical Procedure for Partitioning Soil Test Correlation Data Into Two Classes","publication_year":1971,"publication_date":"1971-07-01","ids":{"openalex":"https://openalex.org/W1999375437","doi":"https://doi.org/10.2136/sssaj1971.03615995003500040048x","mag":"1999375437"},"language":"en","primary_location":{"id":"doi:10.2136/sssaj1971.03615995003500040048x","doi":"https://doi.org/10.2136/sssaj1971.03615995003500040048x","is_oa":false,"landing_page_url":"https://doi.org/10.2136/sssaj1971.03615995003500040048x","pdf_url":null,"source":{"id":"https://openalex.org/S59755854","display_name":"Soil Science Society of America Journal","issn_l":"0361-5995","issn":["0361-5995","1435-0661"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-b","jufo-2","ki-jl-2","norway-2","poland-100","russia-white-list-2"],"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":"Soil Science Society of America Journal","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/A5018017350","display_name":"Robert B. Cate","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Robert B. Cate","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"last","author":{"id":"https://openalex.org/A5113492145","display_name":"Larry A. Nelson","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I137902535","display_name":"North Carolina State University","ror":"https://ror.org/04tj63d06","country_code":"US","type":"education","lineage":["https://openalex.org/I137902535"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Larry A. Nelson","raw_affiliation_strings":["Research Associate, International Soil Fertility Evaluation & Improvement Program, Dept. of Soil Science, and Professor, Dept. of Statistics, North Carolina State Univ., Raleigh, N.C"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Research Associate, International Soil Fertility Evaluation & Improvement Program, Dept. of Soil Science, and Professor, Dept. of Statistics, North Carolina State Univ., Raleigh, N.C","institution_ids":["https://openalex.org/I137902535"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":{"value":2020,"currency":"USD","value_usd":2020},"apc_paid":null,"fwci":4.006,"has_fulltext":false,"cited_by_count":513,"citation_normalized_percentile":{"value":0.89021213,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":99,"max":100},"biblio":{"volume":"35","issue":"4","first_page":"658","last_page":"660"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T12294","display_name":"Agricultural Science and Fertilization","score":0.4745999872684479,"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"}},"topics":[{"id":"https://openalex.org/T12294","display_name":"Agricultural Science and Fertilization","score":0.4745999872684479,"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","score":0.24500000476837158,"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/T14137","display_name":"Agriculture, Soil, Plant Science","score":0.12060000002384186,"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/soil-test-interpretation","display_name":"soil test interpretation","score":0.7210000157356262},{"id":"https://openalex.org/keywords/fertilizer-recommendation","display_name":"fertilizer recommendation","score":0.5640000104904175},{"id":"https://openalex.org/keywords/critical-level","display_name":"critical level","score":0.7039999961853027},{"id":"https://openalex.org/keywords/predictive-power","display_name":"predictive power","score":0.4819999933242798},{"id":"https://openalex.org/keywords/coefficient-of-determination","display_name":"R-squared","score":0.4230000078678131}],"concepts":[{"id":"https://openalex.org/C2780586882","wikidata":"https://www.wikidata.org/wiki/Q7520643","display_name":"Simple (philosophy)","level":2,"score":0.7456833124160767},{"id":"https://openalex.org/C117220453","wikidata":"https://www.wikidata.org/wiki/Q5172842","display_name":"Correlation","level":2,"score":0.6736046671867371},{"id":"https://openalex.org/C2777212361","wikidata":"https://www.wikidata.org/wiki/Q5127848","display_name":"Class (philosophy)","level":2,"score":0.55311518907547},{"id":"https://openalex.org/C2777267654","wikidata":"https://www.wikidata.org/wiki/Q3519023","display_name":"Test (biology)","level":2,"score":0.5455630421638489},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.4896288514137268},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.45715564489364624},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.41683003306388855},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.36806580424308777},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.19977730512619019},{"id":"https://openalex.org/C127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","level":0,"score":0.11500781774520874},{"id":"https://openalex.org/C111472728","wikidata":"https://www.wikidata.org/wiki/Q9471","display_name":"Epistemology","level":1,"score":0.0},{"id":"https://openalex.org/C151730666","wikidata":"https://www.wikidata.org/wiki/Q7205","display_name":"Paleontology","level":1,"score":0.0},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.0},{"id":"https://openalex.org/C138885662","wikidata":"https://www.wikidata.org/wiki/Q5891","display_name":"Philosophy","level":0,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.2136/sssaj1971.03615995003500040048x","doi":"https://doi.org/10.2136/sssaj1971.03615995003500040048x","is_oa":false,"landing_page_url":"https://doi.org/10.2136/sssaj1971.03615995003500040048x","pdf_url":null,"source":{"id":"https://openalex.org/S59755854","display_name":"Soil Science Society of America Journal","issn_l":"0361-5995","issn":["0361-5995","1435-0661"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-b","jufo-2","ki-jl-2","norway-2","poland-100","russia-white-list-2"],"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":"Soil Science Society of America Journal","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[{"id":"https://openalex.org/F4320306113","display_name":"U.S. Department of State","ror":"https://ror.org/03vvynj75"},{"id":"https://openalex.org/F4320306115","display_name":"United States Agency for International Development","ror":"https://ror.org/01n6e6j62"}],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W2046086611","https://openalex.org/W4310796724","https://openalex.org/W1964314371","https://openalex.org/W2364798731","https://openalex.org/W3184191986","https://openalex.org/W3195774977","https://openalex.org/W4399459208","https://openalex.org/W2736242972","https://openalex.org/W7125393186","https://openalex.org/W3080642367"],"abstract_inverted_index":{"Abstract":[0],"Most":[1],"soil":[2,6,169],"test":[3,7,170],"laboratories":[4],"divide":[5],"results":[8,158],"into":[9,78],"two":[10,79,107],"or":[11,55],"more":[12],"classes":[13,45],"for":[14,25,41,66],"the":[15,26,32,39,43,68,76,103,106,111,137,154,175],"purpose":[16],"of":[17,34,105,124,127,165,168],"making":[18],"fertilizer":[19],"recommendations.":[20],"This":[21,57],"is":[22,52,73],"usually":[23],"done":[24],"practical":[27],"reason":[28],"that":[29,88,174],"it":[30],"reduces":[31],"number":[33],"different":[35,44],"recommendations":[36],"necessary.":[37],"However,":[38],"basis":[40],"defining":[42],"(e.g.,":[46],"Very":[47],"Low,":[48,49],"Medium,":[50],"etc.)":[51],"often":[53],"subjective":[54],"arbitrary.":[56],"paper":[58,115],"explains":[59],"a":[60,148,163],"simple,":[61],"yet":[62],"statistically":[63],"sound,":[64],"method":[65],"setting":[67],"class":[69],"limits.":[70],"The":[71,114],"procedure":[72,177],"to":[74,86,136],"split":[75,151],"data":[77,121],"groups,":[80],"using":[81,120],"successive":[82],"tentative":[83],"critical":[84,90],"levels":[85],"ascertain":[87],"particular":[89],"level":[91],"which":[92],"will":[93],"maximize":[94],"overall":[95],"predictive":[96],"ability":[97],"(":[98],"R":[99,145],"2":[100,146],"),":[101],"with":[102,162],"means":[104],"groups":[108],"(classes)":[109],"as":[110,142,147],"predictor":[112],"values.":[113],"presents":[116],"an":[117,144],"actual":[118],"example,":[119],"believed":[122],"typical":[123],"this":[125],"kind":[126],"problem.":[128],"Several":[129],"continuous":[130],"correlation":[131,171],"models":[132],"were":[133],"also":[134],"fitted":[135],"same":[138],"data.":[139],"None":[140],"gave":[141],"high":[143],"single":[149],"Low\u2010High":[150],"defined":[152],"by":[153],"suggested":[155],"procedure.":[156],"Similar":[157],"have":[159],"been":[160],"obtained":[161],"majority":[164],"200":[166],"sets":[167],"data,":[172],"indicating":[173],"new":[176],"may":[178],"be":[179],"widely":[180],"applicable.":[181]},"counts_by_year":[{"year":2026,"cited_by_count":20},{"year":2025,"cited_by_count":9},{"year":2024,"cited_by_count":19},{"year":2023,"cited_by_count":20},{"year":2022,"cited_by_count":13},{"year":2021,"cited_by_count":16},{"year":2020,"cited_by_count":16},{"year":2019,"cited_by_count":15},{"year":2018,"cited_by_count":19},{"year":2017,"cited_by_count":14},{"year":2016,"cited_by_count":15},{"year":2015,"cited_by_count":15},{"year":2014,"cited_by_count":10},{"year":2013,"cited_by_count":12},{"year":2012,"cited_by_count":18}],"updated_date":"2026-11-12T12:28:57.059296","created_date":"2016-06-24T00:00:00"}
