{"id":"https://openalex.org/W1980490258","doi":"https://doi.org/10.2134/agronj1980.00021962007200030009x","title":"Double and Monocropped Wheat and Soybeans Under Different Tillage and Row Spacings1","display_name":"Double and Monocropped Wheat and Soybeans Under Different Tillage and Row Spacings1","publication_year":1980,"publication_date":"1980-05-01","ids":{"openalex":"https://openalex.org/W1980490258","doi":"https://doi.org/10.2134/agronj1980.00021962007200030009x","mag":"1980490258"},"language":"en","primary_location":{"id":"doi:10.2134/agronj1980.00021962007200030009x","doi":"https://doi.org/10.2134/agronj1980.00021962007200030009x","is_oa":false,"landing_page_url":"https://doi.org/10.2134/agronj1980.00021962007200030009x","pdf_url":null,"source":{"id":"https://openalex.org/S139950591","display_name":"Agronomy Journal","issn_l":"0002-1962","issn":["0002-1962","1072-9623","1435-0645"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-c","jufo-1","ki-jl-1","norway-1","poland-100","russia-white-list-1","vabb-shw"],"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":"Agronomy 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/A5103403026","display_name":"R. J. Crabtree","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"R. J. Crabtree","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"last","author":{"id":"https://openalex.org/A5023438878","display_name":"Robert Noel Rupp","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"R. N. Rupp","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":0,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":{"value":1800,"currency":"USD","value_usd":1800},"apc_paid":null,"fwci":3.7871,"has_fulltext":false,"cited_by_count":38,"citation_normalized_percentile":{"value":0.90572792,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":87,"max":93},"biblio":{"volume":"72","issue":"3","first_page":"445","last_page":"448"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T12792","display_name":"Soil Management and Crop Yield","score":0.98580002784729,"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/T12792","display_name":"Soil Management and Crop Yield","score":0.98580002784729,"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/T12436","display_name":"Agronomic Practices and Intercropping Systems","score":0.004999999888241291,"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/T12310","display_name":"Crop Yield and Soil Fertility","score":0.003599999938160181,"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/double-cropping","display_name":"double cropping","score":0.9760000109672546},{"id":"https://openalex.org/keywords/wheat","display_name":"wheat","score":0.7549999952316284},{"id":"https://openalex.org/keywords/soybean","display_name":"soybean","score":0.8100000023841858},{"id":"https://openalex.org/keywords/tillage","display_name":"tillage","score":0.7049999833106995},{"id":"https://openalex.org/keywords/row-spacing","display_name":"row spacing","score":0.9430000185966492},{"id":"https://openalex.org/keywords/no-tillage","display_name":"no-tillage","score":0.8690000176429749},{"id":"https://openalex.org/keywords/conventional-tillage","display_name":"conventional tillage","score":0.949999988079071},{"id":"https://openalex.org/keywords/soil-moisture","display_name":"soil moisture","score":0.9729999899864197},{"id":"https://openalex.org/keywords/water-storage-efficiency","display_name":"water storage efficiency","score":0.7519999742507935},{"id":"https://openalex.org/keywords/crop-yield","display_name":"crop yield","score":0.7919999957084656},{"id":"https://openalex.org/keywords/monoculture","display_name":"monoculture","score":0.5709999799728394},{"id":"https://openalex.org/keywords/seedling-stand","display_name":"seedling stand","score":0.4490000009536743}],"concepts":[{"id":"https://openalex.org/C6557445","wikidata":"https://www.wikidata.org/wiki/Q173113","display_name":"Agronomy","level":1,"score":0.8103818893432617},{"id":"https://openalex.org/C16397148","wikidata":"https://www.wikidata.org/wiki/Q878333","display_name":"Tillage","level":2,"score":0.719089925289154},{"id":"https://openalex.org/C113578266","wikidata":"https://www.wikidata.org/wiki/Q1131303","display_name":"Loam","level":3,"score":0.6980370283126831},{"id":"https://openalex.org/C93990901","wikidata":"https://www.wikidata.org/wiki/Q3610518","display_name":"Multiple cropping","level":3,"score":0.5773073434829712},{"id":"https://openalex.org/C24939127","wikidata":"https://www.wikidata.org/wiki/Q373499","display_name":"Water content","level":2,"score":0.5197408199310303},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.5014677047729492},{"id":"https://openalex.org/C2780696901","wikidata":"https://www.wikidata.org/wiki/Q5166322","display_name":"Conventional tillage","level":3,"score":0.5011355876922607},{"id":"https://openalex.org/C75639521","wikidata":"https://www.wikidata.org/wiki/Q1283519","display_name":"Field experiment","level":2,"score":0.5003852844238281},{"id":"https://openalex.org/C2776325102","wikidata":"https://www.wikidata.org/wiki/Q2551340","display_name":"Water-use efficiency","level":3,"score":0.4353587329387665},{"id":"https://openalex.org/C137580998","wikidata":"https://www.wikidata.org/wiki/Q235352","display_name":"Crop","level":2,"score":0.4231574833393097},{"id":"https://openalex.org/C159750122","wikidata":"https://www.wikidata.org/wiki/Q96621023","display_name":"Soil water","level":2,"score":0.38736823201179504},{"id":"https://openalex.org/C168741863","wikidata":"https://www.wikidata.org/wiki/Q777671","display_name":"Sowing","level":2,"score":0.3144317865371704},{"id":"https://openalex.org/C88862950","wikidata":"https://www.wikidata.org/wiki/Q11453","display_name":"Irrigation","level":2,"score":0.27568870782852173},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.27061405777931213},{"id":"https://openalex.org/C39432304","wikidata":"https://www.wikidata.org/wiki/Q188847","display_name":"Environmental science","level":0,"score":0.25008219480514526},{"id":"https://openalex.org/C159390177","wikidata":"https://www.wikidata.org/wiki/Q9161265","display_name":"Soil science","level":1,"score":0.06925433874130249},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.0},{"id":"https://openalex.org/C187320778","wikidata":"https://www.wikidata.org/wiki/Q1349130","display_name":"Geotechnical engineering","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.2134/agronj1980.00021962007200030009x","doi":"https://doi.org/10.2134/agronj1980.00021962007200030009x","is_oa":false,"landing_page_url":"https://doi.org/10.2134/agronj1980.00021962007200030009x","pdf_url":null,"source":{"id":"https://openalex.org/S139950591","display_name":"Agronomy Journal","issn_l":"0002-1962","issn":["0002-1962","1072-9623","1435-0645"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-c","jufo-1","ki-jl-1","norway-1","poland-100","russia-white-list-1","vabb-shw"],"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":"Agronomy Journal","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/2","display_name":"Zero hunger","score":1.0}],"study_designs":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W2025422526","https://openalex.org/W2911636528","https://openalex.org/W7066694136","https://openalex.org/W1987050390","https://openalex.org/W1970056643","https://openalex.org/W2106050060","https://openalex.org/W4413008668","https://openalex.org/W2106136058","https://openalex.org/W3189630130","https://openalex.org/W2083923397"],"abstract_inverted_index":{"Abstract":[0],"In":[1],"wheat":[2,40,76,84,94,193,225],"[Triticum":[3],"aestivum":[4],"(L.)":[5,81],"Thell]":[6],"producing":[7,24],"regions":[8],"with":[9],"adequate":[10],"frost\u2010free":[11],"days":[12],"to":[13,55,89,108,124,142,201],"permit":[14],"double\u2010cropping,":[15],"water":[16,66,221],"is":[17],"often":[18],"the":[19,25,37,57,161,175,195],"most":[20],"limiting":[21],"factor":[22],"in":[23,102,111,118,128,136,145,150,174,179,187],"second":[26],"crop.":[27],"To":[28],"more":[29,212],"fully":[30,196],"utilize":[31],"climatic":[32],"resources":[33],"and":[34,61,68,73,77,167,182,211,218,226],"land":[35],"after":[36],"harvest":[38],"of":[39,59,70,153,172,199,215],"grain,":[41],"a":[42,48],"field":[43],"study":[44],"was":[45,156],"conducted":[46],"on":[47,64],"Wynona":[49],"silty":[50],"clay":[51],"loam":[52],"(Cumulic":[53],"Haplaquolls)":[54],"analyze":[56],"effects":[58],"tillage":[60,97,132,166],"row":[62,168],"spacings":[63],"soil":[65,154,219],"content":[67,149],"yields":[69,184],"monocropped":[71,93,133],"(MC)":[72],"double\u2010cropped":[74,115],"(DC)":[75],"soybeans":[78,100,116,134,227],"[Glycine":[79],"max":[80],"Merr.].":[82],"Double\u2010cropped":[83],"(DCW)":[85],"yielded":[86,105,121,139],"2,210":[87],"compared":[88,107,123,141],"2,530":[90],"kg/ha":[91,110,144],"for":[92,185,206],"(MCW).":[95],"Conventional":[96,131],"double":[98],"cropped":[99],"(CT\u2010DCS)":[101],"50\u2010cm":[103,119,137],"rows":[104,120,138],"1,610":[106],"1,460":[109],"75\u2010cm":[112,129,146],"rows.":[113,130,147],"No\u2010tillage":[114],"(NTDCS)":[117],"1,730":[122],"1,550":[125],"kg/":[126],"ha":[127],"(CT\u2010MCS)":[135],"2,010":[140],"1,880":[143],"Water":[148,189],"120":[151],"cm":[152],"profile":[155],"not":[157],"significantly":[158],"affected":[159],"during":[160],"soybean":[162],"growing":[163],"period":[164],"by":[165],"spacings;":[169],"however,":[170],"lack":[171],"moisture":[173],"soil\u2010seed":[176],"environment":[177],"resulted":[178],"poorer":[180],"stands":[181],"lower":[183],"CT\u2010MCS":[186],"1976.":[188],"storage":[190],"efficiency":[191],"under":[192],"from":[194],"ripe":[197],"stage":[198],"growth":[200],"late":[202],"September":[203],"averaged":[204],"28%":[205],"MCW.":[207],"More":[208],"grain":[209],"production":[210],"effective":[213],"use":[214],"annual":[216],"precipitation":[217],"stored":[220],"were":[222,228],"achieved":[223],"when":[224],"DC.":[229]},"counts_by_year":[{"year":2025,"cited_by_count":1},{"year":2021,"cited_by_count":1},{"year":2020,"cited_by_count":1},{"year":2016,"cited_by_count":1},{"year":2014,"cited_by_count":1}],"updated_date":"2026-11-07T11:25:07.637180","created_date":"2016-06-24T00:00:00"}
