{"id":"https://openalex.org/W2008016948","doi":"https://doi.org/10.4314/gjas.v29i2.2000","title":"Research and Development Note: The utilization of Azolla as a source of nitrogen for rice production in Ghana","display_name":"Research and Development Note: The utilization of Azolla as a source of nitrogen for rice production in Ghana","publication_year":1996,"publication_date":"1996-02-01","ids":{"openalex":"https://openalex.org/W2008016948","doi":"https://doi.org/10.4314/gjas.v29i2.2000","mag":"2008016948"},"language":"en","primary_location":{"id":"doi:10.4314/gjas.v29i2.2000","doi":"https://doi.org/10.4314/gjas.v29i2.2000","is_oa":true,"landing_page_url":"https://doi.org/10.4314/gjas.v29i2.2000","pdf_url":null,"source":{"id":"https://openalex.org/S2764641250","display_name":"Ghana Journal of Agricultural Science","issn_l":"0855-0042","issn":["0855-0042"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":["jpps-1"],"host_organization":"https://openalex.org/P4310321518","host_organization_name":"African Journals OnLine","host_organization_lineage":["https://openalex.org/P4310321518"],"host_organization_lineage_names":["African Journals OnLine"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Ghana Journal of Agricultural Science","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"diamond","oa_url":"https://doi.org/10.4314/gjas.v29i2.2000","any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5113534730","display_name":"K. Nyalemegbe","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"K. Nyalemegbe","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5108613698","display_name":"JW Oteng","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"J. W. Oteng","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"last","author":{"id":"https://openalex.org/A5024346749","display_name":"R. K. Ahiabu","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"R. K. Ahiabu","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":2,"citation_normalized_percentile":{"value":0.0,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":88,"max":93},"biblio":{"volume":"29","issue":"2","first_page":null,"last_page":null},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T12294","display_name":"Agricultural Science and Fertilization","score":0.9940999746322632,"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":0.9940999746322632,"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/T12045","display_name":"Rice Cultivation and Yield Improvement","score":0.004399999976158142,"subfield":{"id":"https://openalex.org/subfields/1110","display_name":"Plant 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":0.0006000000284984708,"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/green-manure","display_name":"green manure","score":0.9330000281333923},{"id":"https://openalex.org/keywords/rice","display_name":"rice","score":0.7609999775886536},{"id":"https://openalex.org/keywords/nitrogen-fertilization","display_name":"nitrogen fertilization","score":0.7200000286102295},{"id":"https://openalex.org/keywords/ammonium-sulfate","display_name":"ammonium sulfate","score":0.9580000042915344},{"id":"https://openalex.org/keywords/vertisols","display_name":"Vertisols","score":0.7789999842643738},{"id":"https://openalex.org/keywords/grain-yield","display_name":"grain yield","score":0.6850000023841858},{"id":"https://openalex.org/keywords/organic-nitrogen-sources","display_name":"organic nitrogen sources","score":0.414000004529953}],"concepts":[{"id":"https://openalex.org/C2781226114","wikidata":"https://www.wikidata.org/wiki/Q1128633","display_name":"Azolla","level":2,"score":0.9863804578781128},{"id":"https://openalex.org/C2780560099","wikidata":"https://www.wikidata.org/wiki/Q83323","display_name":"Fertilizer","level":2,"score":0.621979832649231},{"id":"https://openalex.org/C6557445","wikidata":"https://www.wikidata.org/wiki/Q173113","display_name":"Agronomy","level":1,"score":0.5686200261116028},{"id":"https://openalex.org/C37991615","wikidata":"https://www.wikidata.org/wiki/Q1192084","display_name":"Vertisol","level":3,"score":0.4433697760105133},{"id":"https://openalex.org/C537208039","wikidata":"https://www.wikidata.org/wiki/Q627","display_name":"Nitrogen","level":2,"score":0.41876864433288574},{"id":"https://openalex.org/C137580998","wikidata":"https://www.wikidata.org/wiki/Q235352","display_name":"Crop","level":2,"score":0.4172220826148987},{"id":"https://openalex.org/C2776617377","wikidata":"https://www.wikidata.org/wiki/Q182329","display_name":"Ammonium nitrate","level":2,"score":0.41446298360824585},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.3997842073440552},{"id":"https://openalex.org/C185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","level":0,"score":0.326840877532959},{"id":"https://openalex.org/C18903297","wikidata":"https://www.wikidata.org/wiki/Q7150","display_name":"Ecology","level":1,"score":0.060360223054885864},{"id":"https://openalex.org/C159750122","wikidata":"https://www.wikidata.org/wiki/Q96621023","display_name":"Soil water","level":2,"score":0.06019148230552673},{"id":"https://openalex.org/C178790620","wikidata":"https://www.wikidata.org/wiki/Q11351","display_name":"Organic chemistry","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.4314/gjas.v29i2.2000","doi":"https://doi.org/10.4314/gjas.v29i2.2000","is_oa":true,"landing_page_url":"https://doi.org/10.4314/gjas.v29i2.2000","pdf_url":null,"source":{"id":"https://openalex.org/S2764641250","display_name":"Ghana Journal of Agricultural Science","issn_l":"0855-0042","issn":["0855-0042"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":["jpps-1"],"host_organization":"https://openalex.org/P4310321518","host_organization_name":"African Journals OnLine","host_organization_lineage":["https://openalex.org/P4310321518"],"host_organization_lineage_names":["African Journals OnLine"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Ghana Journal of Agricultural Science","raw_type":"journal-article"}],"best_oa_location":{"id":"doi:10.4314/gjas.v29i2.2000","doi":"https://doi.org/10.4314/gjas.v29i2.2000","is_oa":true,"landing_page_url":"https://doi.org/10.4314/gjas.v29i2.2000","pdf_url":null,"source":{"id":"https://openalex.org/S2764641250","display_name":"Ghana Journal of Agricultural Science","issn_l":"0855-0042","issn":["0855-0042"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":["jpps-1"],"host_organization":"https://openalex.org/P4310321518","host_organization_name":"African Journals OnLine","host_organization_lineage":["https://openalex.org/P4310321518"],"host_organization_lineage_names":["African Journals OnLine"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Ghana Journal of Agricultural Science","raw_type":"journal-article"},"sustainable_development_goals":[{"display_name":"Zero hunger","id":"https://metadata.un.org/sdg/2","score":0.991100013256073}],"study_designs":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W7219259273","https://openalex.org/W3089171221","https://openalex.org/W1987307517","https://openalex.org/W2073818952","https://openalex.org/W274246438","https://openalex.org/W4294094331","https://openalex.org/W2133563778","https://openalex.org/W2109707488","https://openalex.org/W2007105636","https://openalex.org/W6968537488"],"abstract_inverted_index":{"The":[0,32,173],"performance":[1],"of":[2,6,27,52,59,65,68,82,97,147,200],"the":[3,37,47,83,95,98,126,137,144,170,184,194],"local":[4],"strain":[5],"Azolla,":[7,69,101],"Azolla":[8,28,33,117,141,148,185,191],"pinnata":[9],"var.":[10],"africana,":[11],"as":[12],"a":[13,25,50,56,62,151,164],"green":[14],"manure":[15],"for":[16,91,169,183],"rice":[17,38,92],"was":[18,34,75,167],"compared":[19],"with":[20,104],"inorganic":[21,30],"nitrogen":[22,86],"alone":[23],"and":[24,29,55,125,139,180,193],"combination":[26,103],"nitrogen.":[31],"incorporated":[35],"under":[36,44,157],"crop":[39],"(cv.":[40],"GRUG":[41],"7)":[42],"grown":[43],"irrigation":[45],"on":[46,94],"vertisol.":[48],"Within":[49],"period":[51],"4":[53],"weeks":[54],"doubling":[57],"time":[58],"5":[60],"days,":[61],"total":[63],"biomass":[64],"18":[66],"t/ha":[67,182],"equivalent":[70,153],"to":[71,154],"25":[72],"kg":[73,89,106,120,159,189],"N/ha":[74,107,121,160],"produced.":[76],"This":[77],"is":[78],"28":[79],"per":[80],"cent":[81],"optimum":[84],"recommended":[85],"rate":[87],"(90":[88],"N/ha)":[90],"cultivation":[93],"vertisols":[96],"Accra":[99],"Plains.":[100],"in":[102],"40":[105],"ammonium":[108,122,161],"sulphate":[109,123,162],"fertilizer,":[110],"gave":[111,150],"significantly":[112],"higher":[113],"grain":[114,131,174],"yields":[115,175],"than":[116],"only,":[118],"60":[119,158,188],"fertilizer":[124],"control":[127,195],"plot.":[128],"No":[129],"significant":[130],"yield":[132,152,166],"differences":[133],"were":[134,176],"observed":[135,168],"between":[136],"single":[138,171],"double":[140,145],"incorporations,":[142],"but":[143],"incorporation":[146],"only":[149,192],"that":[155],"obtained":[156],"while":[163],"lower":[165],"incorporation.":[172],"4.8,":[177],"3.5,":[178],"2.7":[179],"1.8":[181],"plus":[186],"N-fertilizer,":[187],"N/ha,":[190],"plot":[196],"respeectively.":[197],"(Ghana":[198],"Journal":[199],"Agricultural":[201],"Science,":[202],"1996,":[203],"29(2):":[204],"125-129)":[205]},"counts_by_year":[{"year":2022,"cited_by_count":1},{"year":2015,"cited_by_count":1}],"updated_date":"2026-08-21T09:56:20.448147","created_date":"2016-06-24T00:00:00"}