Singam, S. et al. 2020. Effects of Formulated Nano-Urea Hydroxyapatite Slow Release Fertilizer Composite on the Physical, Chemical Properties, Growth and Yield of Cyamopsis tetragonoloba (Cluster Beans). Asian Journal of Chemistry. 33, 1 (Dec. 2020), 159–165. DOI:https://doi.org/10.14233/ajchem.2021.22975.