Rice Straw Stump Cutter
Keywords:
Rice straw stump cutter, Walking tractor implements, Rice stubble managementAbstract
The objectives of this research are to develop, construct, and test a rice stump cutter to be used with a power tiller. The cutting machine is expected to be capable of collecting all cut stumps as well as reducing their size. The machine is composed of a 11 HP single cylinder engine as a power source, a power transmission system, a cutting unit, and a stump collector. According to the field tests, it is found that the developed machine has the rate of successful cutting at 91.88%, the rate of cutting at 22.6 Min/Rai, the rate of fuel consumption at 0.24 liter/Rai, and the rate of stump collecting at 66.2 kg/Rai. It is found that the total amount of stump that can be kept by the machine is 75%. The economic analysis showed that the machine has 21.14 THB/Rai as variable cost, and 12,300 TBH for fixed cost. Based on the rice straw price at 25 THB per 20 kg, it is required to operate the machine approximately over 59.89 RAIs/year to meet the break-even point and 9.4 days to achieve the payback period.
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