“Yield and Trace Metal Levels in Colocasia (Colocasia Esculenta L.)-Potato (Solanum Tuberosum L.) Cropping Sequence As Influence by Fly Ash and Fertilizer Application”. Emergent Life Sciences Research (October 24, 2017): 1–5. Accessed September 2, 2026. https://emergentresearch.org/index.php/ELSR/article/view/72.