On inland soils, a study indicated that the optimal planting density is about 148 palm/ha in the inland/interior land. As a convention in the industry, the planting density of oil palm on inland soils ranges from 136-148 palm/ha. This study indicated that a lower or higher density than 148 palms/ha does not maximize income.
Maximum income is obtained when oil palm is planted at a density of 148 palm/ha, ceteris paribus. Unlike the results obtained on peat soils, this finding is conclusive and can be used as a guide by planters.
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