Abstract:
This research aimed to study about the general information of mangosteen, queen of fruit
in Thailand, and to analyze the cost and benefit on investment of mangosteen production.
Moreover, this research will help agriculturists in southern part of Thailand get through rubber
prices crisis especially agriculturists in Narathiwat province. All the data was based on the
secondary data which were collected by government sector and private sector for making it more
reliable. Data were analyzed by using descriptive statistics; frequency, ratio, percentage,
arithmetic mean and standard deviation. Analyzing the cost and return of investment used
quantitative analysis: Net Present Value (NPV), Benefit-Cost Ratio (BC), Pay Back period (PB),
Sensitivity and Internal Rate of Return (IRR). The study found that the overall cost and benefit
are worthy.
The result of the cost and return from the mangosteen production in the crop year showed
that the average cost was 811,054 baht per rai (unit of area equal to 1,600 square metres) with
variable costs of 202,306 baht per rai and the fixed cost of 608,748 baht per rai. NPV was
560,231.35 while IRR was 11.57 percent at 10 percent discounted rate, B/C was 1.09, and
payback period was 11 years 1 month 2 days. It was founded that investment in a premium grade
mangoesteen orchard was feasible. However, sensitivity showed that only if the cost shift up more
than 10 percent or the benefit shift down 10 percent it will cause a money deficit up to
(1,012,074) and (1,021,898). In order to gain more return from the investment, agriculturists
should manage the orchard well by reducing cost of capital and gaining more knowledge, also
farmers should have more fund and support from government sector to avoid the high cost of
capital.