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Problem statement: There was no information about the relationship between growth&#13; parameters, such as diameter and height and tree component biomass of Khaya ivorensis plantations&#13; with different soil types. The objectives of this study were, first, to determine and compare the growth&#13; of K. ivorensis in three different (Padang Besar, Durian and Rengam) soil series of Ultisols and,&#13; second, to develop an allometric equation that estimates the biomass accumulation of the K. ivorensis&#13; plantation in three different soil series five years after planting. Approach: This study was conducted&#13; at a K. ivorensis plantation in the Forest Research Institute Malaysia (FRIM) Research Station in&#13; Segamat, Johor, Malaysia. The tree height (H) and Diameter at Breast Height (DBH) were measured to&#13; evaluate the growth performance of the K. ivorensis plantation. Five sampled or trees stand of K.&#13; ivorensis in each soil series were destructively analyzed. Results: The highest growth rates in terms of&#13; MAI diameter and height, and basal area were found for the Padang Besar soil series, which was&#13; followed by the Durian and Rengam soil series. The best fit regression of site-specific equations&#13; developed from the independent variable D are recommended for estimating tree component biomass&#13; and stem volume in each site. A single allometric equation using D was applicable for the estimation of&#13; biomass and stem volume however, in Padang Besar, stem biomass and stem volume were estimated&#13; with an equation using D2H. The highest stem volume and biomass accumulation value were recorded&#13; at Padang Besar (77.99 m3 h-1 and 63.16 t ha-1, respectively), which was followed by the Durian (53.10&#13; m3 h-1 and 46.33t ha-1, respectively) and Rengam soil series (43.13 m3 h-1 and 40.96 t ha-1,&#13; respectively). Conclusion: Differences in the growth and biomass accumulation data indicate that&#13; forest productivity of K. ivorensis was affected by different site conditions. The higher growth&#13; performance and productivity of K. ivorensis in terms of the stem volume and biomass accumulation in&#13; Padang Besar compared those in the Durian and Rengam soil series shows that the species was able to&#13; adapt to the soil characteristics of the Padang Besar soil series

Growth Performance and Biomass Accumulation of a <i>Khaya ivorensis</i> Plantation in three Soil Series of Ultisols