| Summary: | This paper presents the result of estimation's func lion of production, cost and profit to the rubber estate. The production of rubber was affected by size of field, equal tapper of class A, labor of PTM (mature plant maintenance) and pesticide. The average GT1 rubber clone production was lower compared to non-GT1 clone. The relations between production and age of plant were quadratic. The cost of production was affected by E thepon stimulant, equal tapper of class A, labor of PTM and NPK fertilizer. The relations between cost of production and age of plant were not quadratic. The profit of plantation was affected by size of field, equal tapper of class A, PTM labor and pesticide. The relations between profit and age of plant were quadratic.
Key words: Production -- cost of production -- profit function
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