Oil plam was the most important biodiesel plants and were considered as an important part of energy future in Thailand. Some oil palm plantations were grown in soil pH with acid conditions, which lacked of supporting data for agriculturalist. Attempts were made to study the effect of the level of soil pH on the quality of palm oil. Three palm varieties were used to study the production of the fruit and the kernel. Free Fatty Acids (FFA) in three levels of soil pH with acid condition were analyzed using AOCS Ca 50-40 method. It was found that UV, Tenera, and Deli Compact were varieties that could grow in acidic-pH soil.The highest yield of the production of the fruit and the kernel from the oil palm plantations that were grown in soil-pH conditions less than 6 were 3,855.2, 3,172, and 2,623 kg/ha in UV, Tenera and Deli Compact, respectively. Results of FFA found in three varieties of acidic soil in the three varying levels were not different. The mean values of FFA of UV, Deli Compact and Tenera species were 3.59, 3.65, and 3.72 %, respectively, while the FFA of three varieties of oil palm that were grown in soil pH conditions greater than 6 were 3.48, 3.66, and 3.50 %, respectively. This finding suggested that acidity conditions of soil did not affect the quality of production yield of oil palm and can use as a guideline in the planning and more effective expansion of oil palm plantations.
Pitchayasinee Ariyatanakatawong, Rajabhat Rajanagarinra University, Thailand
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