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Determination of the optimum dosage of urea fertilizer (source N) and MOP (source K) in oil palm producing (TM) plants through fertilization experiments in the field is very important because the plant needs for both types of fertilizers are relatively high. N-K fertilization trials on TM (aged 4-12 years) have been conducted at one location of PT.Salim Ivomas Pratama Tbk & Subs (in two gardens: Lubuk Raja Estate and / Balam Rumbia Estate) during the 1992-2000 time period. The urea and MOPdoi:10.36764/ja.v3i2.266 fatcat:oy6ojdqsjncjlaj24sf7bmcciy