{"id":"https://openalex.org/W2188200422","doi":null,"title":"TESTING THE EFFECTIVENESS OF SOIL PRODUCTIVITY INDEX (PI) MODEL FOR SELECTED SOILS IN MAKURDI, NIGERIA","display_name":"TESTING THE EFFECTIVENESS OF SOIL PRODUCTIVITY INDEX (PI) MODEL FOR SELECTED SOILS IN MAKURDI, NIGERIA","publication_year":2012,"publication_date":"2012-01-01","ids":{"openalex":"https://openalex.org/W2188200422","mag":"2188200422"},"language":"en","primary_location":{"id":"mag:2188200422","doi":null,"is_oa":false,"landing_page_url":"https://www.cabdirect.org/cabdirect/abstract/20133015082","pdf_url":null,"source":{"id":"https://openalex.org/S2764534785","display_name":"Journal of agricultural and biological science","issn_l":"1990-6145","issn":["1990-6145"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core"],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"journal"},"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":false,"raw_source_name":"Journal of agricultural and biological science","raw_type":null},"volume":null,"type":"article","indexed_in":[],"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/A5112415153","display_name":"P. I. Agber","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"P. I. Agber","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"last","author":{"id":"https://openalex.org/A5062133153","display_name":"Bemgba Anjembe","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Bemgba Anjembe","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":0,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":1,"citation_normalized_percentile":{"value":0.28829667,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":93},"biblio":{"volume":"7","issue":"11","first_page":"927","last_page":"932"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T13058","display_name":"Soil and Land Suitability Analysis","score":0.8676999807357788,"subfield":{"id":"https://openalex.org/subfields/2308","display_name":"Management, Monitoring, Policy and Law"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T13058","display_name":"Soil and Land Suitability Analysis","score":0.8676999807357788,"subfield":{"id":"https://openalex.org/subfields/2308","display_name":"Management, Monitoring, Policy and Law"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12792","display_name":"Soil Management and Crop Yield","score":0.12409999966621399,"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/T12294","display_name":"Agricultural Science and Fertilization","score":0.0034000000450760126,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/soil-productivity-index","display_name":"soil productivity index","score":0.9829999804496765},{"id":"https://openalex.org/keywords/soil-productivity","display_name":"soil productivity","score":0.8740000128746033},{"id":"https://openalex.org/keywords/maize","display_name":"maize","score":0.6039999723434448},{"id":"https://openalex.org/keywords/sorghum","display_name":"sorghum","score":1.0},{"id":"https://openalex.org/keywords/seed-yield","display_name":"seed yield","score":0.949999988079071},{"id":"https://openalex.org/keywords/root-development","display_name":"root development","score":0.5849999785423279},{"id":"https://openalex.org/keywords/available-water-capacity","display_name":"available water capacity","score":0.8349999785423279},{"id":"https://openalex.org/keywords/soil-ph","display_name":"soil pH","score":0.8109999895095825},{"id":"https://openalex.org/keywords/bulk-density","display_name":"bulk density","score":0.8809999823570251},{"id":"https://openalex.org/keywords/soil-organic-matter","display_name":"soil organic matter","score":0.75},{"id":"https://openalex.org/keywords/clay-content","display_name":"clay content","score":0.7540000081062317},{"id":"https://openalex.org/keywords/root-zone-depth","display_name":"root zone depth","score":0.8100000023841858},{"id":"https://openalex.org/keywords/terrain-slope","display_name":"terrain slope","score":0.6039999723434448},{"id":"https://openalex.org/keywords/leaf-area-index","display_name":"leaf area index","score":0.7710000276565552},{"id":"https://openalex.org/keywords/plant-height","display_name":"plant height","score":0.7149999737739563},{"id":"https://openalex.org/keywords/southern-guinea-savanna","display_name":"southern Guinea savanna","score":0.6669999957084656},{"id":"https://openalex.org/keywords/makurdi","display_name":"Makurdi","score":0.9959999918937683}],"concepts":[{"id":"https://openalex.org/C204983608","wikidata":"https://www.wikidata.org/wiki/Q2111958","display_name":"Productivity","level":2,"score":0.697391152381897},{"id":"https://openalex.org/C159750122","wikidata":"https://www.wikidata.org/wiki/Q96621023","display_name":"Soil water","level":2,"score":0.6610704064369202},{"id":"https://openalex.org/C118518473","wikidata":"https://www.wikidata.org/wiki/Q11451","display_name":"Agriculture","level":2,"score":0.5624285936355591},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.5107154846191406},{"id":"https://openalex.org/C39432304","wikidata":"https://www.wikidata.org/wiki/Q188847","display_name":"Environmental science","level":0,"score":0.49354469776153564},{"id":"https://openalex.org/C2777382242","wikidata":"https://www.wikidata.org/wiki/Q6017816","display_name":"Index (typography)","level":2,"score":0.487984836101532},{"id":"https://openalex.org/C6557445","wikidata":"https://www.wikidata.org/wiki/Q173113","display_name":"Agronomy","level":1,"score":0.4705280065536499},{"id":"https://openalex.org/C88463610","wikidata":"https://www.wikidata.org/wiki/Q194118","display_name":"Agricultural engineering","level":1,"score":0.4578148424625397},{"id":"https://openalex.org/C134121241","wikidata":"https://www.wikidata.org/wiki/Q899301","display_name":"Yield (engineering)","level":2,"score":0.44217705726623535},{"id":"https://openalex.org/C126343540","wikidata":"https://www.wikidata.org/wiki/Q889514","display_name":"Crop yield","level":2,"score":0.4374266266822815},{"id":"https://openalex.org/C2778157034","wikidata":"https://www.wikidata.org/wiki/Q12111","display_name":"Sorghum","level":2,"score":0.43601104617118835},{"id":"https://openalex.org/C159390177","wikidata":"https://www.wikidata.org/wiki/Q9161265","display_name":"Soil science","level":1,"score":0.323174387216568},{"id":"https://openalex.org/C205649164","wikidata":"https://www.wikidata.org/wiki/Q1071","display_name":"Geography","level":0,"score":0.31131747364997864},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.16653898358345032},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.11549988389015198},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.1113521158695221},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.07405093312263489},{"id":"https://openalex.org/C162324750","wikidata":"https://www.wikidata.org/wiki/Q8134","display_name":"Economics","level":0,"score":0.0628146231174469},{"id":"https://openalex.org/C139719470","wikidata":"https://www.wikidata.org/wiki/Q39680","display_name":"Macroeconomics","level":1,"score":0.0},{"id":"https://openalex.org/C166957645","wikidata":"https://www.wikidata.org/wiki/Q23498","display_name":"Archaeology","level":1,"score":0.0},{"id":"https://openalex.org/C97355855","wikidata":"https://www.wikidata.org/wiki/Q11473","display_name":"Thermodynamics","level":1,"score":0.0},{"id":"https://openalex.org/C136764020","wikidata":"https://www.wikidata.org/wiki/Q466","display_name":"World Wide Web","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"mag:2188200422","doi":null,"is_oa":false,"landing_page_url":"https://www.cabdirect.org/cabdirect/abstract/20133015082","pdf_url":null,"source":{"id":"https://openalex.org/S2764534785","display_name":"Journal of agricultural and biological science","issn_l":"1990-6145","issn":["1990-6145"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core"],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"journal"},"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":false,"raw_source_name":"Journal of agricultural and biological science","raw_type":null}],"best_oa_location":null,"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/2","display_name":"Zero hunger","score":0.958299994468689}],"study_designs":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":13,"referenced_works":["https://openalex.org/W381157406","https://openalex.org/W1249024678","https://openalex.org/W1642724957","https://openalex.org/W1827309069","https://openalex.org/W2023062949","https://openalex.org/W2068908344","https://openalex.org/W2086415909","https://openalex.org/W2091070596","https://openalex.org/W2091160252","https://openalex.org/W2091932770","https://openalex.org/W2099656668","https://openalex.org/W2260826789","https://openalex.org/W2590315510"],"related_works":["https://openalex.org/W2741560432","https://openalex.org/W3042834895","https://openalex.org/W2290622860","https://openalex.org/W2374368933","https://openalex.org/W833576209","https://openalex.org/W4238286010","https://openalex.org/W2475025027","https://openalex.org/W1966608921","https://openalex.org/W1973009518","https://openalex.org/W2118398213"],"abstract_inverted_index":{"Soil":[0],"productivity":[1,25,38,151,203,227],"evaluation":[2],"for":[3,132],"a":[4,8,43,59],"long":[5],"has":[6],"been":[7],"major":[9],"hotspot":[10],"in":[11,28,65,77,103,178],"soil":[12,24,46,71,150,229],"science.":[13],"In":[14],"this":[15,104,219],"article,":[16],"research":[17,74,164],"conducted":[18,76],"to":[19,148],"evaluate":[20],"the":[21,70,82,91,95,133,138,163,179,185,189,197],"effectiveness":[22],"of":[23,33,45,51,61,94,97,122,128,188,191],"index":[26,39,177,204,220],"(PI)":[27,40],"Makurdi":[29],"Southern":[30],"Guinea":[31],"Savanna":[32],"Nigeria":[34],"is":[35,42,54,58,67],"reported.":[36],"The":[37,48,100,206],"model":[41,53,105,143],"measure":[44],"productivity.":[47],"basic":[49],"assumption":[50],"PI":[52,129,142,215],"that":[55,141,218],"crop":[56],"yield":[57,213,224],"function":[60],"root":[62,123],"development,":[63],"which":[64,209],"turn":[66],"controlled":[68],"by":[69],"environment.":[72],"This":[73,194],"was":[75],"2007":[78],"and":[79,84,87,90,120,174,181,214],"2008":[80],"at":[81,152],"Teaching":[83,180],"Research":[85,182],"(T":[86],"R)":[88],"Farm":[89,93,183,187],"SIWES":[92,186],"University":[96,190],"Agriculture":[98,192],"Makurdi.":[99,193],"factors":[101],"used":[102,146],"included":[106],"available":[107],"water":[108],"capacity,":[109],"pH,":[110],"bulk":[111],"density,":[112],"land":[113],"slope,":[114],"clay":[115],"content,":[116],"organic":[117],"matter":[118],"content":[119],"depth":[121],"zone.":[124],"Comparisons":[125],"were":[126],"made":[127],"values":[130],"obtained":[131],"selected":[134],"sites.":[135],"Results":[136,161],"from":[137,162],"study":[139,198],"show":[140],"can":[144,221],"be":[145],"efficiently":[147],"characterize":[149],"specific":[153],"site":[154],"if":[155],"accurate":[156],"field":[157],"data":[158],"are":[159],"available.":[160],"work":[165],"revealed":[166],"significantly":[167],"higher":[168,201],"average":[169],"seed":[170,212],"yield,":[171],"plant":[172],"height":[173],"leaf":[175],"area":[176],"than":[184],"coincided":[195],"with":[196,200],"location":[199],"calculated":[202],"(PI).":[205],"significant":[207],"correlations":[208],"existed":[210],"between":[211],"evaluated":[216],"showed":[217],"actually":[222],"explain":[223],"variations.":[225],"Keyword:":[226],"index,":[228],"productivity,":[230],"maize,":[231],"sorghum,":[232],"model.":[233]},"counts_by_year":[{"year":2023,"cited_by_count":1}],"updated_date":"2026-09-26T08:19:03.415552","created_date":"2016-06-24T00:00:00"}
