**10. Conclusion**

The results represent a correlation between the maturity of the oil palm frond and the portion of the oil palm fronds composite boards experimented in expressions of the physical properties and strength of the composite boards. The highest density using an air-dried method for the boards was highlighted at the matured bottom portion, followed by intermediate middle and young top portions. Besides, the density under the oven-dried method represented the values were reduced from the bottom to the top portion for each maturity group and highlighted that the mature group possessed the highest density values for every portion compared to others, followed by the intermediate and young maturity groups. Nonetheless, the MOE strength showed reduced values from the bottom to the top portion for mature level with either phenol or urea-formaldehyde resins. The MOE strength also decreased with a proportional decrease of maturity level. In addition, the MOR represented decreased value from the bottom to the top portion for each maturity level and matured to the young maturity levels for every section. The results include both types of resin used for composite board manufacturing.

Furthermore, the compression strength decreases from the bottom portion towards the middle and top section for the maturity and bottom, middle and top portions. Highlighted also the decreasing trend from mature towards intermediate and young maturity groups for the bottom portion, and this polar was also observed for the middle and top portion. Statistical analysis found significant differences between physical properties and mechanical properties across varying maturity levels and a different board section.

Finally, we can conclude that the oil palm fronds composite boards is suitable for furniture manufacturing based on physical and strength properties. The oil palm frond can produce quality composites board that possesses the physical and mechanical strength values that are better than the composite boards made from oil palm stem and less than rubberwood.
