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Volume 48 (2013)
- Issue 4 Pages 133-
- Issue 3 Pages 103-
- Issue 2 Pages 49-
- Issue 1 Pages 1-
Volume 48, Issue 3
Displaying 1-3 of 3 articles from this issue
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Original Paper
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Yuko UEKA, Jun YAMASHITA, Kazunobu SATO2013 Volume 48 Issue 3 Pages 103-109
Published: September 20, 2013
Released on J-STAGE: March 20, 2014
JOURNAL FREE ACCESSIn this study, a cutting apparatus and an electric planter were developed for saving labor and energy during the direct planting of sweet potatoes, which is a raw material for bioethanol. The power consumption of the planter was examined for determining its suitability for use.
On the occasion of specification decision of cutting apparatus, the cutting angle and speed was considered about 9 degrees, 0.3-0.5 m/s in consideration of miniaturization of a device, and the promotion of efficiency of work. It took approximately 50 seconds to make eight pieces of seed sweet potatoes from one sweet potato by using cutting apparatus.
An electric planter equipped with a 1.5 kW motor showed significantly lower energy consumption compared to an unmodified gasoline engine. The electric power required for only the planting operation of the electric planter was about 20% of that required for the movement of the planter. Since much of the electric power is used for the movement of the planter, further energy savings can be expected if resistance to the movement is reduced.
The continuous operating time was 3.7 h for area coverage of 1300 m2 which amounts to a continuous operating time of 2.76 h per 1000 m2. Even if battery degradation is assumed to be 80%, a continuous operating time of 2.96 h for area coverage of 1000 m2, is possible. Thus, the planter can be adopted for practical use.View full abstractDownload PDF (416K) -
Yoshiteru KAWAMURA, Keiko NAKANO, Muneshi MITSUOKA, Eiji INOUE, Takash ...2013 Volume 48 Issue 3 Pages 111-120
Published: September 20, 2013
Released on J-STAGE: March 20, 2014
JOURNAL FREE ACCESSThe study was conducted to evaluate the quality and yield of wheat when the partially shallow tilling and sowing (PSTS) method was used, and to survey the amount of time and fuel consumed in working. The results showed that PSTS method produced slightly higher yield of wheat grain than the usual method, and that both the bulk density and protein content of wheat in PSTS method increased compared with those of the grain in the usual method. In addition, it became clear that PSTS method could considerably reduce labor time and fuel consumption while working in tilling and sowing.View full abstractDownload PDF (645K)
Research Paper
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Ei SEKI, Shunsuke OKADA, Hirokatsu SHITO, Yutaka KIKUCHI, Makoto NAKAN ...2013 Volume 48 Issue 3 Pages 121-129
Published: September 20, 2013
Released on J-STAGE: March 20, 2014
JOURNAL FREE ACCESSUsing information and communications tecnology, we have developed an e-learning system as a more efficient learning resource on farm work safety. We aimed to design it for a wide range of users to learn effectively by means of visuals such as movies, and so that users’ knowledge level can be estimated. The system was designed to be easily used and operated on wide range of personal computers without any need for registration or learning management systems. The developed system included seven learning items concerning four types of hig-accident-risk machinery. Each item comprised a scenario with questions, movies, etc., to ensure effective learning. The users’ knowledge level can be estimated by counting the page views of each file that comprised the system. After the release of the system, we estimated the users’ knowledge level on farm work safety. The ratios of correct answers were lower for questions on the stability of tractors and combine harvesters, and higher for questions on roll-over protective structures on tractors. As for power tillers, the ratio of correct answers was lower for questions on number of accidents and on the prevention of caught-between accidents when reversing. Concerning bush cutters, the ratio of correct answers was lower for questions on the most typical accidents and the causes of kickback. These results were similar to answers from farmers responding to a questionnaire about farm work that they felt was most risky, and the characteristics of the actual accidents. We concluded that these points should be more widely understood.View full abstractDownload PDF (544K)
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