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dc.contributor.author Mubyana, T.
dc.contributor.author Krah, M.
dc.contributor.author Totolo, O.
dc.contributor.author Bonyongo, M.
dc.date.accessioned 2009-02-17T13:18:13Z
dc.date.available 2009-02-17T13:18:13Z
dc.date.issued 2003
dc.identifier.citation Mubyana T. et al (2003) Influence of seasonal flooding on soil total nitrogen, organic phosphorus and microbial populations in the Okavango Delta, Botswana, Journal of Arid Environments, vol. 54, pp. 359–369 en
dc.identifier.issn 0140-1963
dc.identifier.uri http://hdl.handle.net/10311/293
dc.description.abstract The effect of flooding on soil total nitrogen, phosphorus and microbial population in different vegetation zones (floodplain, island and woodland) and profile depth (0?1, 0?5, 2?0, 3?0, 4?0 and 5?0m) of the Okavango Delta was studied from February to July 1999. Total nitrogen significantly differed with soil profile depth, moisture regime and months. In the woodlands, insignificant total nitrogen was detected at all depths except at 0?1m, where 0?03% and 1?17% were detected in February and March, respectively. In the island samples, only 0?05% was detected at 4m in February. Nitrogen in the floodplain samples was concentrated in the A1 horizon where 0?12%, 0?61% and 0?03% were detected in February, March, and May, respectively. Organic phosphorus significantly differed with vegetation zone but not with months and depth. Although organic phosphorus was low (0?02–0?52%) at all sites, it was liberally distributed throughout the profiles. On the island, actinomycetes were only detected up to 2m in February and up to 3m in July. Fungi concentrated in the top 0?5m (103–105). In both the floodplain and island samples, bacteria concentrated in the upper 3m. However, after May, populations decreased significantly. In the floodplain, significant actinomycetes populations were only detected in the upper 0?5m. Generally, organic phosphorus showed positive correlations with fungal populations. This study indicates that these soils are low in total nitrogen and phosphorus. en
dc.language.iso en en
dc.publisher Journal of Arid Environments. http://www.elsevier.com/wps/find/journaldescription.cws_home/622855/description#description en
dc.subject Okavango en
dc.subject Botswana en
dc.subject soil nitrogen en
dc.subject phosphorus en
dc.subject woodland en
dc.subject island en
dc.subject floodplain en
dc.title Influence of seasonal flooding on soil total nitrogen, organic phosphorus and microbial populations in the Okavango Delta, Botswana en
dc.type Published Article en


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