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Indonesia is an agricultural country. Agricultural land still extends throughout the archipelago. In modern times, there are many agricultural lands that have been done with machine tools, like the rice paddy hand tractor. Hand tractors are widely used in rural or inland rice fields. Its function is to plow the land or to loosen paddy fields before planting rice. In Bali the agricultural sector is also the basis of the economy in addition to the tourism sector and small industry. Rice fields in the area of Bali in the processing of many land use hand tractors. It should also be noted that although machine tools are designed to provide convenience for farmers, on the other hand it also has a negative influence on farmers as its users. One of the effects is that this machine makes a loud noise, causes vibration, and heavy besides the work is actually done under the intense direct sunlight. For this reason an observational study was carried out on 20 farmers or field workers who had used hand tractors in 5 regencies in Bali. We aim to evaluate the workload, through the measurement of pulse, ECPT (extra calorie due to peripheral temperature), ECPM (extra calorie due to peripheral metabolism), engine vibration, noise, wind speed, ambient temperature and humidity. The results showed that the workload of farmers was classified as heavy, ECPT> ECPM, an increase in muscle complaints and general fatigue in farmers. For this reason, an ergonomic intervention is needed for farmers cultivating rice fields in Tabanan Regency. Because ECPT> ECPM, in the ergonomics intervention, the environment influences such as noise, vibration, machine weight, solar heat must be kept as small as possible so as to reduce the workload of farmers.

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