| Project/Area Number |
05660289
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
農業機械学
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| Research Institution | IBARAKI UNIVERSITY |
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Principal Investigator |
MORIIZUMI Shoji Ibaraki University, Faculty of Agriculture, Associate Professor, 農学部, 助教授 (80007682)
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| Co-Investigator(Kenkyū-buntansha) |
HAYASHI Naotaka Ibaraki University, Faculty of Agriculture, Professor, 農学部, 教授 (10007669)
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| Project Period (FY) |
1993 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1994: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1993: ¥1,100,000 (Direct Cost: ¥1,100,000)
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| Keywords | Tillage / Rotary Tiller / Soil Displacement by Tillage / Soil-Overturning / Clod Size Distribution |
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| Research Abstract |
We made up-cut rotary with two axles (abbreviation ; two axles rotary) for increasing soil-overturning by rotary tillage. In this experiment, the soil overturning and clod size distribution by two axles rotary tillage were investigated. At the same time, we examined the performance of a conventional up-cut rotary. So we can be discussed the comparison of both rotary.
The main results were as follows.
(1) The mean weight diameter of clod size distribution by two axles rotary tillage was smaller than one of a conventional rotary tillage. This result suggests that the tillage by two axles rotary make pulverization of many times than conventional rotary.
(2) The effects of rake rod space and rotational speed ratio of front-rear rotary on soil-overturning were not observed because the clod size was smaller than forecast.
(3) The soil displacement ratio from surface layr to lower layr after tillage was 12% in the conventional rotary tillage. On the contrary, its value of two axles rotary was the range of 28.3-36.3%. Therefore, it is assumed that two axles rotary was more useful than a conventional rotary in the soil-overturning properties.
(4) The specific torque of two axles rotary showed the values ranging from 0.242to0.329_N・m/cm^2 at upland field experiment.
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