In Table 1, you report Napier grass fiber tensile strength as 88.40 ± 4.35 MPa (Kommula et al. 2016) and also as 756 MPa (Reddy et al. 2012) ; an almost 9-fold difference for untreated fibers from the same grass species.
How do you explain this order-of-magnitude discrepancy? Was fiber extraction method, age, or testing standard fundamentally different? Without clarification, these data severely undermine the reliability of your comparative analysis.