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The effectiveness of alum in reducing P release under Manitoba spring weather conditions was evaluated in a 42\u2010day experiment using 15\u2010cm soil monoliths from eight agricultural soils, which were unamended or alum\u2010amended (5 Mg ha<jats:sup>\u22121<\/jats:sup>) and flooded to a 10\u2010cm head. Dissolved reactive P (DRP) concentrations and pH of porewater and floodwater were determined on flooding day and every 7 days after flooding (DAF). Porewater and floodwater DRP concentrations in unamended soils increased 1.4\u2010 to 4.5\u2010fold, and 1.8\u2010 to 15.3\u2010fold, respectively, from 7 to 42 DAF. In alum\u2010amended soils, DRP concentrations averaged across soils was 43%\u201373% (1.0\u20132.0\u00a0mg L<jats:sup>\u22121<\/jats:sup>) lower in porewater, and 27%\u201364% (0.1\u20131.2\u00a0mg L<jats:sup>\u22121<\/jats:sup>) lower in floodwater than unamended soils during the flooding period. The reduction of DRP by alum was more pronounced under high fluctuating diurnal spring air temperature than with controlled air temperature (4\u00b0C) in a previous similar study. Acidic pH in porewater and floodwater due to alum did not persist over 7 days. This study showed that alum application is a viable option in reducing P released to floodwater in agricultural soils of cold regions where flooding\u2010induced P loss is prevalent in the spring.<\/jats:p>","DOI":"10.1002\/jeq2.20469","type":"journal-article","created":{"date-parts":[[2023,2,27]],"date-time":"2023-02-27T05:54:51Z","timestamp":1677477291000},"page":"718-729","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Alum reduced phosphorus release from flooded soils under cold spring weather conditions"],"prefix":"10.1002","volume":"52","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3661-9601","authenticated-orcid":false,"given":"Ahmed","family":"Lasisi","sequence":"first","affiliation":[{"name":"Department of Environmental Studies and Sciences The University of Winnipeg  Winnipeg Manitoba Canada"},{"name":"Swift Current Research and Development Centre Agriculture and Agri\u2010Food Canada  Swift Current Saskatchewan Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chamara S.","family":"Weerasekara","sequence":"additional","affiliation":[{"name":"Department of Environmental Studies and Sciences The University of Winnipeg  Winnipeg Manitoba Canada"},{"name":"Department of Soil Science University of Manitoba  Winnipeg Manitoba Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7613-0667","authenticated-orcid":false,"given":"Darshani","family":"Kumaragamage","sequence":"additional","affiliation":[{"name":"Department of Environmental Studies and Sciences The University of Winnipeg  Winnipeg Manitoba Canada"},{"name":"Department of Soil Science University of Manitoba  Winnipeg Manitoba Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Olalekan O.","family":"Akinremi","sequence":"additional","affiliation":[{"name":"Department of Soil Science University of Manitoba  Winnipeg Manitoba Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2023,3,30]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41467\u2010020\u201018326\u20107"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0925\u20108574(99)00026\u20109"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.1002\/jeq2.20319"},{"key":"e_1_2_9_5_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.est.2c01185"},{"key":"e_1_2_9_6_1","doi-asserted-by":"publisher","DOI":"10.2134\/jeq2004.0415"},{"key":"e_1_2_9_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0065\u20102113(10)06001\u20103"},{"key":"e_1_2_9_8_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1475\u20102743.2011.00326.x"},{"key":"e_1_2_9_9_1","doi-asserted-by":"publisher","DOI":"10.1029\/2020WR027984"},{"key":"e_1_2_9_10_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.soilbio.2021.108223"},{"key":"e_1_2_9_11_1","doi-asserted-by":"publisher","DOI":"10.2134\/jeq2019.02.0091"},{"key":"e_1_2_9_12_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1475\u20102743.2008.00177.x"},{"key":"e_1_2_9_13_1","doi-asserted-by":"publisher","DOI":"10.1080\/00103624.2011.591467"},{"key":"e_1_2_9_14_1","doi-asserted-by":"publisher","DOI":"10.1007\/s11356\u2010018\u20103968\u20109"},{"key":"e_1_2_9_15_1","volume-title":"Threatened lake of the year 2013: Lake Winnipeg in Canada","author":"Global Nature Fund","year":"2013"},{"key":"e_1_2_9_16_1","doi-asserted-by":"crossref","first-page":"408","DOI":"10.1080\/00224561.2002.12457473","article-title":"The fate and transport of phosphorus in agricultural systems","volume":"57","author":"Hansen N. 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