The challenge to plant one seed or plant per hill by rice ordinary rice transplanter (RT) is still difficult to be achieved due to random in sowing seed by on rice nursery tray. But due to the vigority of seed after sowing in the field and also the unfavorable condition, the more number of seed are still needed and the yield lower compare transplanter method. Recently, the use of rice direct seeding has been increasing rapidly owing to rural labor shortages and continuous increases in agricultural production costs. This article reviews the research and application progress of mechanized rice direct seeding including direct seeding technologies, precision rice seeding, precision rice seed-metering devices. The other important component on succession direct seeding method is also discussed i.e. calcium gypsum coating and iron powder coating. Operating direct seeding machine also need consider about land and water management. Paddy field need to be managed since the seed drooped in order give favor condition of seed and facility the seed with optimum growing condition. In this approach, pre-germinated seeds are uniformly hill-dropped in the expected positions in puddled soil. The both technology PNRT and RDS have prospect and great potential for promoting the development of precession on rice cultivation in Asia.

The operation of the pivot type trailer on a two-wheeled tractor on flat land shows that it is more ergonomic than conventional trailers, but for testing on sloping land it has never been tested. Therefore, this study aims to analyze ergonomics, especially the operator’s workload on the operation of a pivot-type trailer on a two-wheel tractor on a sloping land. The calculation of the operator’s workload is based on heart rate measurements, where three operators have their heart rate data taken during the activity of operating a two-wheeled tractor in pulling a trailer. The workloads analyzed are qualitative and quantitative workloads. The results showed that the operation of conventional trailers for land slopes of 0°, 10°, and 30° respectively showed IRHR values of 1.23, 1.24, and 1.31 or the level of work “light”, “light”, and “light”. While using a pivot type trailer, the IRHR values are 1.20, 1.27, and 1.55 or the work levels are “light”, “light”, and “medium”. The average energy consumption rate of operating a conventional trailer is 2.54 kcal/hour.kg-bb (kilocalories per hour per operator’s weight), while using a pivot type trailer 2.60 kcal/hour.kg-bb. The high level of operator workload is largely determined by the skill of the operator in operating the trailer, which requires training in its operation. This causes the operator’s workload to operate on pivot type trailers higher than conventional trailers. However, from the aspect of operator comfort and safety, pivot-type trailers are superior, especially when turning.

The operation of the pivot trailer on flat land is more ergonomic than conventional trailers, but on sloping land it has never been tested. The operation of the two-wheeled tractor carried out by the operator on uneven land has problems with the steering handlebar which goes up and down following the movement of the tractor body, thus affecting the increase in workload. To reduce the excessive workload, it is necessary to design a trailer that can be controlled easily. The purpose of this study was to analyze ergonomics, especially the operator's workload when operating a pivot trailer and conventional trailer on a two-wheel tractor using cage wheels. The trailer is towed on a tractor with treatment on sloping land and flat land with several turns, and data collection of the operator's workload uses the heart rate method. The results showed that the operation of the pivot trailer for sloping land (0°, 10°, and 30°) respectively showed IRHR values of 1.13, 1.15, and 1.46 or work levels of "Light", "Light”, and “Medium”. When using a conventional trailer, the IRHR values are 1.12, 1.12, and 1.39 or work levels of “Light”, “Light” and “Medium”. The average energy consumption rate for operating a pivot type trailer is 2.80 kcal/hour.kg-bb (kilocalories per hour per operator weight), while using a conventional trailer is 2.75 kcal/hour.kg-bb. The level of operator workload is also influenced by skills in driving.

Recently, the work of climbing coconuts, especially in Aceh Province Indonesia still uses traditional methods, namely by climbing coconut trees directly. Traditional climbing is very high risk because it can fall which threatens the safety of life. Besides that, this job is also a heavy work category because it requires a lot of energy to do it. Therefore, the analysis of operator workload on climbing coconut trees using portable coconut climbing equipment is expected to be useful for developing tool designs and methods for climbing coconuts that are safer, more comfortable and more effective. The calculation of the operator’s workload is based on heart rate measurements, where three operators have their heart rate data taken during coconut tree climbing activities, either manually or using portable climbing tools. The workloads analyzed are qualitative and quantitative workloads. The results of the workload analysis indicate that climbing is traditionally classified as a “medium” job with an average IRHR value of 1.45, while using portable climbing equipment is classified as heavy work with an IRHR value of 1.54 The traditional climbing energy consumption rate is 3.29 kcal/hour.kg-ow (kilocalories per hour per operator’s weight), while using a portable climbing equipment is 3.82 kcal/hour.kg-ow. The high level of operator workload is largely determined by the operator’s habits in doing climbing as well as skills that must be trained in operating the tool. However, in terms of operator safety, the use of portable equipment has a higher level of security because there are footrests and handrails as well as seat belts.

This study aims to analyze the pivot type trailer operation with an ergonomic approach and the necessary interventions required to minimize work risks. Data collection was carried out using questionnaires and video recordings of the operators when the tractors as well as trailers were being operated at various conditions such as track, load, speed, straight motion or turn. Based on the Range of Motion (ROM) analysis, it was discovered that while operating this pivot type trailer, the upper body segments, such as neck, shoulders, elbows and back of the operator, comfortably controlled the tractor. Meanwhile, in the lower body segments, such as the thighs and knees, the operator generally felt discomfort. Furthermore, the analysis of the operator's subjectivity perception showed that discomfort was felt at several segments of the upper and lower body, such as the hands and knees. Therefore, several ergonomic interventions are required to increase the comfort of operating this pivot type trailer.