What does this research mean for the field?

Despite having favorable conventional irrigation indices, the water from River Osun in peri-urban Osogbo is unsuitable for agricultural irrigation due to toxic heavy metal concentrations that exceed FAO limits. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

This study assesses heavy metal levels in River Osun to determine its suitability for irrigation in peri-urban Osogbo.

July 31, 2026Discover EnvironmentOpen Access

Heavy metal(loid) contamination of River Osun at peri-urban areas of Osogbo and its suitability for irrigation

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Authors

TOT.F. OyewusiOsun State University WLW.A. LamidiOsun State University IAI. K. AdesinaOsun State University

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Implication

Evaluated heavy metal levels in River Osun for irrigation suitability, highlighting contamination concerns in peri-urban areas.

Key Points

This study assesses heavy metal levels in River Osun to determine its suitability for irrigation in peri-urban Osogbo.
Water samples were collected from four locations during dry and rainy seasons.
Heavy metals were analyzed using standard methods and irrigation indices were computed.
Statistical analyses included Pearson correlation and two-way ANOVA.
Elevated metal concentrations (Pb: 9.13–9.55, Cd: 4.05–5.20, Cr: 5.04–5.71) exceeded FAO limits.
High levels of essential metals (Cu: 5.67–6.11, Zn: 3.11–4.12) also surpassed permissible thresholds.
Despite low irrigation risk indicators, toxic metal concentrations made the river unsuitable for irrigation.

Cite This Study

Oyewusi et al. (2026) studied this question.

synapsesocial.com/papers/6a6c46e6747664a1aa73bc49 https://doi.org/10.1007/s44274-026-00867-1

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Heavy metal(loid) contamination of River Osun at peri-urban areas of Osogbo and its suitability for irrigation

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Key Points

Cite This Study

Heavy metal(loid) contamination of River Osun at peri-urban areas of Osogbo and its suitability for irrigation

Discussion

Member takes

Implication

Key Points

Cite This Study

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