A disc with 10 cm thickness was sliced from each log after
a certain days of storage between 0 and 120 days. To avoid
microbial contamination, 5 cm from the end was trimmed
before the slicing. Then the disc was cut into three sections;
inner (A), intermediate (B) and outer (C) as shown in Fig. 1.
the sap of felled oil palm trunks. The results clearly show
a significant increase of fermentable sugars in the oil palm
sap occurs during storage of the trunks after logging, indicating
the old and felled oil palm trunks are the promising
feedstock for bioethanol.