{"id":"https://openalex.org/W1993995685","doi":"https://doi.org/10.2136/sssaj2002.5440","title":"Site-Specific Nitrogen Management of Irrigated Maize","display_name":"Site-Specific Nitrogen Management of Irrigated Maize","publication_year":2002,"publication_date":"2002-01-01","ids":{"openalex":"https://openalex.org/W1993995685","doi":"https://doi.org/10.2136/sssaj2002.5440","mag":"1993995685"},"language":"en","primary_location":{"id":"doi:10.2136/sssaj2002.5440","doi":"https://doi.org/10.2136/sssaj2002.5440","is_oa":false,"landing_page_url":"https://doi.org/10.2136/sssaj2002.5440","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/A5113973629","display_name":"Richard B. Ferguson","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":true,"raw_author_name":"R. B. Ferguson","raw_affiliation_strings":["South Central Research & Extension Center, University of Nebraska, Box 66, Clay Center, NE, 68933","South Central Research &amp; Extension Center University of Nebraska Box 66 Clay Center NE 68933"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"South Central Research & Extension Center, University of Nebraska, Box 66, Clay Center, NE, 68933","institution_ids":[]},{"raw_affiliation_string":"South Central Research &amp; Extension Center University of Nebraska Box 66 Clay Center NE 68933","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5016240849","display_name":"Gary W. Hergert","orcid":"https://orcid.org/0000-0001-6944-6199","observed_orcids":["https://orcid.org/0000-0001-6944-6199"]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"G. W. Hergert","raw_affiliation_strings":["West Central Research & Extension Center, 461 West University Dr., North Platte, NE, 69101","West Central Research &amp; Extension Center 461 West University Dr. North Platte NE 69101"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"West Central Research & Extension Center, 461 West University Dr., North Platte, NE, 69101","institution_ids":[]},{"raw_affiliation_string":"West Central Research &amp; Extension Center 461 West University Dr. North Platte NE 69101","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5109330419","display_name":"James S. Schepers","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I114395901","display_name":"University of Nebraska\u2013Lincoln","ror":"https://ror.org/043mer456","country_code":"US","type":"education","lineage":["https://openalex.org/I114395901"]},{"id":"https://openalex.org/I1336096307","display_name":"United States Department of Agriculture","ror":"https://ror.org/01na82s61","country_code":"US","type":"government","lineage":["https://openalex.org/I1336096307"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"J. S. Schepers","raw_affiliation_strings":["USDA, Soil & Water Conservation Unit, 279 Plant Science, University of Nebraska, Lincoln, NE, 68583-0915","USDA Soil &amp; Water Conservation Unit 279 Plant Science, University of Nebraska Lincoln NE 68583\u20100915"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"USDA, Soil & Water Conservation Unit, 279 Plant Science, University of Nebraska, Lincoln, NE, 68583-0915","institution_ids":["https://openalex.org/I114395901","https://openalex.org/I1336096307"]},{"raw_affiliation_string":"USDA Soil &amp; Water Conservation Unit 279 Plant Science, University of Nebraska Lincoln NE 68583\u20100915","institution_ids":["https://openalex.org/I114395901","https://openalex.org/I1336096307"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5076658707","display_name":"Carol A. Gotway","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I1289490764","display_name":"Centers for Disease Control and Prevention","ror":"https://ror.org/042twtr12","country_code":"US","type":"government","lineage":["https://openalex.org/I1289490764","https://openalex.org/I1299022934"]},{"id":"https://openalex.org/I4210092468","display_name":"National Center for Environmental Health","ror":"https://ror.org/00jc2kw33","country_code":"US","type":"facility","lineage":["https://openalex.org/I1289490764","https://openalex.org/I1299022934","https://openalex.org/I4210092468"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"C. A. Gotway","raw_affiliation_strings":["National Center for Environmental Health, Mailstop F42, Centers for Disease Control and Prevention, 1600 Clifton Rd. N.E., Atlanta, GA, 30333"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"National Center for Environmental Health, Mailstop F42, Centers for Disease Control and Prevention, 1600 Clifton Rd. N.E., Atlanta, GA, 30333","institution_ids":["https://openalex.org/I1289490764","https://openalex.org/I4210092468"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5108787355","display_name":"Joel Cahoon","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I23732399","display_name":"Montana State University","ror":"https://ror.org/02w0trx84","country_code":"US","type":"education","lineage":["https://openalex.org/I23732399","https://openalex.org/I4210126032"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"J. E. Cahoon","raw_affiliation_strings":["Dept. of Civil Engineering, 220 Cobleigh Hall, Montana State University, Bozeman, MT, 59717-3900"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Dept. of Civil Engineering, 220 Cobleigh Hall, Montana State University, Bozeman, MT, 59717-3900","institution_ids":["https://openalex.org/I23732399"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5054369676","display_name":"T. A. Peterson","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I209244073","display_name":"Pioneer Hi-Bred","ror":"https://ror.org/02nn4s922","country_code":"US","type":"company","lineage":["https://openalex.org/I209244073"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"T. A. Peterson","raw_affiliation_strings":["Pioneer Hi-Bred Int'l., 7100 N.W. 62nd Avenue, Johnstown, IA, 50131-1150"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Pioneer Hi-Bred Int'l., 7100 N.W. 62nd Avenue, Johnstown, IA, 50131-1150","institution_ids":["https://openalex.org/I209244073"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":6,"corresponding_author_ids":["https://openalex.org/A5113973629"],"corresponding_institution_ids":[],"apc_list":{"value":2020,"currency":"USD","value_usd":2020},"apc_paid":null,"fwci":26.1505,"has_fulltext":false,"cited_by_count":208,"citation_normalized_percentile":{"value":0.99603325,"is_in_top_1_percent":true,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":95,"max":99},"biblio":{"volume":"66","issue":"2","first_page":"544","last_page":"544"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T12310","display_name":"Crop Yield and Soil Fertility","score":0.6294000148773193,"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/T12310","display_name":"Crop Yield and Soil Fertility","score":0.6294000148773193,"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":0.2287999987602234,"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/T11311","display_name":"Soil and Water Nutrient Dynamics","score":0.058800000697374344,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/site-specific-nitrogen-management","display_name":"site-specific nitrogen management","score":0.9950000047683716},{"id":"https://openalex.org/keywords/variable-rate-technology","display_name":"variable rate technology","score":0.6850000023841858},{"id":"https://openalex.org/keywords/irrigated-maize","display_name":"irrigated maize","score":0.8460000157356262},{"id":"https://openalex.org/keywords/nitrate-leaching","display_name":"nitrate leaching","score":0.890999972820282},{"id":"https://openalex.org/keywords/nitrogen-use-efficiency","display_name":"nitrogen use efficiency","score":0.7350000143051147},{"id":"https://openalex.org/keywords/reduced-nitrogen-application","display_name":"reduced nitrogen application","score":0.4399999976158142},{"id":"https://openalex.org/keywords/grain-yield","display_name":"grain yield","score":0.7160000205039978},{"id":"https://openalex.org/keywords/soil-organic-matter","display_name":"soil organic matter","score":0.7440000176429749}],"concepts":[{"id":"https://openalex.org/C537208039","wikidata":"https://www.wikidata.org/wiki/Q627","display_name":"Nitrogen","level":2,"score":0.5801092982292175},{"id":"https://openalex.org/C2992211155","wikidata":"https://www.wikidata.org/wiki/Q889514","display_name":"Grain yield","level":2,"score":0.49127644300460815},{"id":"https://openalex.org/C140793950","wikidata":"https://www.wikidata.org/wiki/Q168091","display_name":"Animal science","level":1,"score":0.4663715958595276},{"id":"https://openalex.org/C6557445","wikidata":"https://www.wikidata.org/wiki/Q173113","display_name":"Agronomy","level":1,"score":0.4660089612007141},{"id":"https://openalex.org/C90982505","wikidata":"https://www.wikidata.org/wiki/Q16938886","display_name":"Leaching (pedology)","level":3,"score":0.46110469102859497},{"id":"https://openalex.org/C159750122","wikidata":"https://www.wikidata.org/wiki/Q96621023","display_name":"Soil water","level":2,"score":0.3515779972076416},{"id":"https://openalex.org/C185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","level":0,"score":0.33988261222839355},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.3301667869091034},{"id":"https://openalex.org/C39432304","wikidata":"https://www.wikidata.org/wiki/Q188847","display_name":"Environmental science","level":0,"score":0.32024431228637695},{"id":"https://openalex.org/C159390177","wikidata":"https://www.wikidata.org/wiki/Q9161265","display_name":"Soil science","level":1,"score":0.17770516872406006},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.15399903059005737},{"id":"https://openalex.org/C178790620","wikidata":"https://www.wikidata.org/wiki/Q11351","display_name":"Organic chemistry","level":1,"score":0.0}],"mesh":[],"locations_count":3,"locations":[{"id":"doi:10.2136/sssaj2002.5440","doi":"https://doi.org/10.2136/sssaj2002.5440","is_oa":false,"landing_page_url":"https://doi.org/10.2136/sssaj2002.5440","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"},{"id":"doi:10.2136/sssaj2002.0544","doi":"https://doi.org/10.2136/sssaj2002.0544","is_oa":false,"landing_page_url":"https://doi.org/10.2136/sssaj2002.0544","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"},{"id":"mag:3179110434","doi":null,"is_oa":false,"landing_page_url":"https://experts.nebraska.edu/en/publications/site-specific-nitrogen-management-of-irrigated-maize-yield-and-so","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":null,"is_accepted":false,"is_published":false,"raw_source_name":"Soil Science Society of America Journal","raw_type":null}],"best_oa_location":null,"sustainable_development_goals":[{"score":0.991100013256073,"id":"https://metadata.un.org/sdg/2","display_name":"Zero hunger"},{"score":0.4390000104904175,"id":"https://metadata.un.org/sdg/15","display_name":"Life on land"}],"study_designs":[],"awards":[],"funders":[{"id":"https://openalex.org/F4320310264","display_name":"University of Nebraska-Lincoln","ror":"https://ror.org/043mer456"}],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":19,"referenced_works":["https://openalex.org/W323882285","https://openalex.org/W1495487996","https://openalex.org/W1512719169","https://openalex.org/W1539731330","https://openalex.org/W1600079720","https://openalex.org/W1978145693","https://openalex.org/W1981464754","https://openalex.org/W2019991216","https://openalex.org/W2029016169","https://openalex.org/W2037071877","https://openalex.org/W2047919729","https://openalex.org/W2050297172","https://openalex.org/W2053492093","https://openalex.org/W2081996020","https://openalex.org/W2166863313","https://openalex.org/W2248924780","https://openalex.org/W2482236534","https://openalex.org/W2488630409","https://openalex.org/W4251603696"],"related_works":["https://openalex.org/W3179110434","https://openalex.org/W1994144095","https://openalex.org/W4300058831","https://openalex.org/W4416809689","https://openalex.org/W4399556413","https://openalex.org/W7098156170","https://openalex.org/W2018884923","https://openalex.org/W1141207863","https://openalex.org/W1823390074","https://openalex.org/W7124969114"],"abstract_inverted_index":{"Site-specific":[0],"N":[1,17,66,99,104,126,130,136,311],"management":[2,50],"(SSNM)":[3],"has":[4],"been":[5],"suggested":[6],"as":[7,305],"one":[8,178],"means":[9],"of":[10,98,125,209,250],"further":[11],"increasing":[12],"the":[13,29,92,122,186,215,247,251],"efficiency":[14],"with":[15,54,108,132,138,158,164,175,206,218,302],"which":[16],"fertilizers":[18],"are":[19],"used":[20],"and":[21,77,151,169,197,232,267,275],"reducing":[22],"environmental":[23],"impact.":[24],"Field":[25],"studies":[26],"to":[27,33,47,100,147,193,281,299,308,326],"evaluate":[28],"potential":[30,93],"for":[31,69,94,203,241,256,264,272],"SSNM":[32,56],"reduce":[34],"NO3-N":[35,184,212,220,240],"leaching":[36],"from":[37,45,145,191],"irrigated":[38],"maize":[39,70],"(Zea":[40],"mays":[41],"L.)":[42],"were":[43,152,226],"conducted":[44],"1994":[46],"1997.":[48],"Uniform":[49],"(UM)":[51],"was":[52,117,198],"compared":[53,163,174],"a":[55,95],"strategy":[57],"(variable":[58],"rate":[59,88,97,110],"technology,":[60,89],"VRT)":[61],"based":[62],"on":[63,211],"an":[64],"existing":[65,252],"recommendation":[67,253,270,294],"algorithm":[68,254],"using":[71],"grid":[72],"sampled":[73],"soil":[74,80,182],"organic":[75],"matter":[76],"root":[78,188],"zone":[79,189],"residual":[81,183,239],"NO3-N.":[82],"A":[83],"third":[84],"treatment":[85,210,237],"(reduced":[86],"variable":[87,109],"RVRT)":[90],"evaluated":[91],"reduced":[96,162,173,238],"adequately":[101],"supply":[102],"crop":[103,310],"demand":[105],"when":[106],"combined":[107,301],"application.":[111],"Averaged":[112],"across":[113],"all":[114],"site-years,":[115,168,205],"there":[116,225],"no":[118,207,227],"significant":[119,228],"difference":[120],"in":[121,166,177,185,285],"total":[123],"amount":[124],"applied,":[127],"142":[128],"kg":[129,135],"ha\u22121":[131,137,150],"UM,":[133],"141":[134],"VRT.":[139],"Treatment":[140,180],"mean":[141,181],"grain":[142],"yields":[143],"ranged":[144,190],"4.5":[146],"13.9":[148],"Mg":[149],"influenced":[153],"relatively":[154],"little":[155],"by":[156,319],"treatment,":[157],"VRT":[159,176,233],"yield":[160,171],"significantly":[161,172],"UM":[165,170,231],"two":[167],"site-year.":[179],"0.9-m":[187],"2.7":[192],"14.0":[194],"mg":[195,201,223],"kg\u22121,":[196],"low":[199],"(<6":[200],"kg\u22121)":[202],"eight":[204],"effect":[208],"concentration.":[213],"For":[214],"five":[216],"site-years":[217],"elevated":[219],"concentrations":[221],"(>6":[222],"kg\u22121),":[224],"differences":[229],"between":[230],"treatments,":[234],"while":[235],"RVRT":[236],"three":[242],"site-years.":[243],"We":[244],"conclude":[245],"that":[246,268,292],"spatial":[248],"application":[249,258],"developed":[255],"uniform":[257],"may":[259,278,296],"be":[260,279,300],"inappropriate,":[261],"at":[262,313],"least":[263],"these":[265],"sites,":[266],"unique":[269],"equations":[271],"major":[273],"soils":[274],"climatic":[276],"regions":[277],"necessary":[280],"achieve":[282,327],"substantial":[283],"increases":[284],"N-use":[286,329],"efficiency.":[287,330],"This":[288],"study":[289],"also":[290],"suggests":[291],"improved":[293],"algorithms":[295],"often":[297],"need":[298],"methods":[303],"(such":[304],"remote":[306],"sensing)":[307],"detect":[309],"status":[312],"early,":[314],"critical":[315],"growth":[316],"stages":[317],"followed":[318],"carefully":[320],"timed,":[321],"spatially":[322],"adjusted":[323],"supplemental":[324],"fertilization":[325],"optimum":[328]},"counts_by_year":[{"year":2026,"cited_by_count":3},{"year":2025,"cited_by_count":5},{"year":2024,"cited_by_count":10},{"year":2023,"cited_by_count":6},{"year":2022,"cited_by_count":5},{"year":2021,"cited_by_count":12},{"year":2020,"cited_by_count":7},{"year":2019,"cited_by_count":4},{"year":2018,"cited_by_count":11},{"year":2017,"cited_by_count":8},{"year":2016,"cited_by_count":12},{"year":2015,"cited_by_count":13},{"year":2014,"cited_by_count":12},{"year":2013,"cited_by_count":3},{"year":2012,"cited_by_count":9}],"updated_date":"2026-11-08T12:12:28.789561","created_date":"2016-06-24T00:00:00"}