| Budget Amount *help |
¥4,300,000 (Direct Cost: ¥4,300,000)
Fiscal Year 1985: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1984: ¥2,900,000 (Direct Cost: ¥2,900,000)
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| Research Abstract |
On the reflective discussion to develop the suitable harvesting mechanism with simple structure and minimized driving unit, the bucket type mechanism was adopted and tested to verify its adaptability for further modification using soil bin. This laboratory experiments unveiled several findings as mentioned below.
1) The efficiency of harvest was greatly afgected by moisture content of dune sand exhibiting sudden decrease from 2% or so and unable to harvest at more than 2.8%.
2) The moisture content of dune sand should be provided less than 2%, if no forced oscillation in the case of bucket type prototype.
As the subsequent trials w+ich follows after the development of the first prototype and bucket type harvesting mechanism, the second prototype being applicable as the attachment of a power tiller was designed and fabricated. Designing philosophy includes that the machine should be provided with simple mechanism, less portion to be driven and reasonable cost.
The practicability of this machine was testified at the growing field of Chinese Yam through performance test and measurement concerning efficiency of harvest is influenced by the undulating field surface, the dead leaves and the moisture content of dune sand, nearly more than 80% of it can be achieved under the working depth of 2 to 3 cm and travel speed of 0.2m s without causing any interruption in operation.
As stated above, the second prototype of the bulblet harvester can successfully extend its possibility of application to other bulbous plants including Ghent gladiolus which bears very small bulblets, and contribute in order to hasten agricultural mechanization and labor-saving aspects in sand dune area.
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