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Izzah A. H., . and Wan Asrina W. Y., . and Ahmed O. H, . and Philip L., . (2016) Distribution of total organic carbon and nitrogen in black pepper farms. [Proceedings Paper]
Othman R., . and M. Khanif Y., . and Ahmed O. H, . and Shujrah A. A., . and Hussin A, . and Oad F. C., . (2013) Response of maize to application of humic acid mixed with urea Cu and Zn. [Proceedings Paper]