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dc.contributor.authorHale, Sarah
dc.contributor.authorNurida, Neneng L.
dc.contributor.authorJubaedah, *
dc.contributor.authorMulder, Jan
dc.contributor.authorSørmo, Erlend
dc.contributor.authorSilvani, Ludovica
dc.contributor.authorAbiven, Samuel
dc.contributor.authorJoseph, Stephen
dc.contributor.authorTaherymoosavi, Sarasadat
dc.contributor.authorCornelissen, Gerard
dc.date.accessioned2020-03-18T15:43:33Z
dc.date.available2020-03-18T15:43:33Z
dc.date.created2020-02-20T10:55:55Z
dc.date.issued2020
dc.identifier.issn0048-9697
dc.identifier.urihttps://hdl.handle.net/11250/2647440
dc.description.abstractA multi-season field trial was carried out to investigate the effect of the amendment of biochar, lime, ash and washed biochar on the growth of maize. A degraded, strongly acidic Ultisol (pHKCl 3.60), with a relatively high exchangeable aluminium content (2.4 cmolc/kg) and a low exchangeable calcium content (0.99 cmolc/kg), was used. Soil was treated once at the beginning of the field trial and crop growth was monitored over seven planting seasons (PS). All treatments increased maize yield. The average increases were; seven times for biochar, five times for lime, five times for washed biochar and eight times for ash treatment, when compared to the control across all PS. The effect of biochar, lime and ash treatments on maize yield were sustained over the seven PS. Soil pHKCl was significantly increased (p < 0.05 level) following the addition of all of the amendment materials. All treatments significantly reduced the concentration of Al3+ when compared to the control (p < 0.05), with the lowest concentrations for the lime and ash treatments. The ash treatment also increased the concentration of macronutrients (K, P and Mg) to the greatest extent. Results showed that there was a clear liming effect at play. The better performance of biochar compared to lime, despite lime having the highest pH and the lowest Al3+ concentration, can be explained by the additional K, Mg and P the biochar adds to the soil. Results also showed a clear nutrient addition effect where ash added the most nutrients. Overall, this work supports the fact that small scale farmers in Indonesia should produce biochar from their waste agricultural materials. Doing so not only provides an increase in crop productivity, but also sequesters carbon resulting in the best overall environmental benefit.
dc.language.isoeng
dc.titleThe effect of biochar, lime and ash on maize yield in a long-term field trial in a Ultisol in the humid tropics
dc.typePeer reviewed
dc.typeJournal article
dc.description.versionpublishedVersion
dc.source.journalScience of the Total Environment
dc.identifier.doi10.1016/j.scitotenv.2020.137455
dc.identifier.cristin1796030
dc.relation.projectNorges forskningsråd: 243789
cristin.unitcode7452,5,2,0
cristin.unitnameForurensning og arealutvikling
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode2


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