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Volume 66, Issue 3
Displaying 1-19 of 19 articles from this issue
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S. SHIBUSAWA2004 Volume 66 Issue 3 Pages 1-2
Published: May 01, 2004
Released on J-STAGE: April 30, 2010
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Toshinori KIMURA2004 Volume 66 Issue 3 Pages 4-7
Published: May 01, 2004
Released on J-STAGE: April 30, 2010
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Naoto SHIMIZU2004 Volume 66 Issue 3 Pages 8-15
Published: May 01, 2004
Released on J-STAGE: April 30, 2010
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Yukito FUJII2004 Volume 66 Issue 3 Pages 16-22
Published: May 01, 2004
Released on J-STAGE: April 30, 2010
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M. INAOKA2004 Volume 66 Issue 3 Pages 23-24
Published: May 01, 2004
Released on J-STAGE: April 30, 2010
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N. UMEDA2004 Volume 66 Issue 3 Pages 25-26
Published: May 01, 2004
Released on J-STAGE: April 30, 2010
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M. KANAMITSU2004 Volume 66 Issue 3 Pages 27-29
Published: May 01, 2004
Released on J-STAGE: April 30, 2010
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Xiu Lun WANG, Nobutaka ITO, Koji KITO, Kunio SATO2004 Volume 66 Issue 3 Pages 45-50
Published: May 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe general objective of this study is to find the optimum dimension of grouser shoe of tracked vehicles for best tractive performance. Specifically it aimed to find out the effect of tangential adhesion generated on grouser tip surface that is in contact with soil on the traction of the grouser shoe. The traction of the grouser shoe was predicted at different soil moisture content using three-dimensional shearing model. Then, an experiment was conducted using 6 kinds of soil moisture content and the tangential adhesion generated in the interface between steel and soil and the traction of the grouser shoe were measured. Result showed that the tangential adhesion varies with the increase of soil moisture content and significantly affect the traction of grouser shoe. Moreover, the measured traction coincided perfectly with the predicted one demonstrating the appropriateness of the three-dimensional shearing model in predicting traction of grouser shoe.View full abstractDownload PDF (1024K) -
Kazuhiro TAKEKURA, Shuso KAWAMURA, Kazuhiko ITOH2004 Volume 66 Issue 3 Pages 51-58
Published: May 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSQuality characteristics of brown rice husked with a roll-type husker and an impeller-type husker were examined. Brown rice husked with a roll-type husker and an impeller-type husker was stored, and the influence of the difference in husking systems on the quality of brown rice after storage was investigated. Greater percentage of embryo-removed rice and broken rice were found in brown rice husked with an impeller-type husker than in brown rice husked with a roll-type husker. Vigor rate, germination rate, whiteness, and translucency after storage of brown rice husked with an impeller-type husker were much less than those of brown rice husked with a roll-type husker, and free fat acidity after storage of brown rice husked with an impeller-type husker was much higher than that of brown rice husked with a roll-type husker. The results indicate that an impeller-type husker is not suitable for husking brown rice to be stored.View full abstractDownload PDF (1213K) -
Yoshinari MORIO, Kazuo HORIBE, Kunio SATO2004 Volume 66 Issue 3 Pages 59-68
Published: May 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe objective of this study is to develop an motion recognition system which can think an intelligent support autonomously by tracking worker's behavior in agricultural field. The effectiveness of the worker tracking method by interframe difference and that of the motion expressing method by optical flow were investigated on some kinds of typical worker's behavior in this paper. The tuning of some parameters of both methods, the upgrading of frame rate and the reduction of calculation cost were essential not only to track workers but also to calculate the optical flow in real time.View full abstractDownload PDF (12608K) -
Noise Property and Sound Flow of Combine HarvesterGakusen KIN, Akira SASAO, Kenshi SAKAI2004 Volume 66 Issue 3 Pages 69-76
Published: May 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSReduction of noise of a combine harvester was tried by visualization. At first, the actual state of noise was observed and understood by using a three dimensional acoustic intensity measurement system. The objective was to detect the source of noise and to map the noise generated and its transmision. Secondly, the sound intensity around the operator head was measured, and the sound flow was obtained. Based on the results, a resolution was determined and tested to install a sound isolation board within the path of sound propagation. Mainly the relationship between the shape of isolation board and sound flow was tested and discussed. Also the materials of sound isolation board were taken on account.View full abstractDownload PDF (2049K) -
Yuichiro MIHO, Seishu TOJO, Kengo WATANABE2004 Volume 66 Issue 3 Pages 77-83
Published: May 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSBiogas plant in Japan excluding Hokkaido is designed so that fermentation remains, called digested slurry, may not be used in cultivation as fertilizer and they are separated into solid and liquid, and after separation liquid remains are purified and solid remains are composted. But in this case the cost was too expensive. This paper describes that the utilization of digested slurry in a paddy field effected on the growth of paddy rice and wheat and its environmental load when they are applied to the fields as fertilizer. The results of the experiment show that the growth of paddy rice and wheat applied with digested slurry was less different from that with chemical fertilizer and the ammonia emission was suppressed by applying into soil.View full abstractDownload PDF (1022K) -
Root-matted Soil Behavior under Impact Shear CuttingBambang PURWANTANA, Hisashi HORIO, Koichi SHOJI, Tsuneo KAWAMURA2004 Volume 66 Issue 3 Pages 84-90
Published: May 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe behavior of root-matted soil under impact shear cutting with a single knife was investigated. Fibered soil was used as a substitute for natural root-matted soil. The cutting behavior of the natural root-matted soil was satisfactorily simulated by the fibered soil under cutting at a density of 9×10-2 fibers/mm2. The results of experiments carried out at varying cutting speed, soil moisture content, fiber structure and fiber density are reported. The reaction force of fibered soil was greater than that of simple soil, and it increased with speed and saturated at a speed of about 15m/s. A slightly greater force was required when the fibers inclined away from the knife's cutting edge. The reaction force increased with fiber density and decreased with higher moisture content. The reaction force of the fibered soil with a high moisture content was significantly affected by the reinforcing effect of the fibers.View full abstractDownload PDF (6937K) -
Effects of Soaking Condition for Germ-Retained Rice on GABA FormationToshiko SATAKE, Takeshi FUKUMORI, Houging LIU, Motonobu KAWANO, Yasuhi ...2004 Volume 66 Issue 3 Pages 91-97
Published: May 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn our first paper, it was explained that functional contents: GABA (γ-amino butyric acid) and free essential amino acid were formed by physiological activation of germ in brown rice. In this paper, it was clearly found that GABA formation was possible in germ-retained rice of which germ was damaged and that the amount of formed GABA varied with germ remaining rate. At the same germ remaining rate of germ-retained rice, it was shown that difference in water temperature for rice washing, atmospheric temperature or soaking water temperature, and processing time length affected the amount of GABA and free essential amino acid formation. In this research, after the sample was washed by about 20°C water, drained, and left for one hour under the condition of 20°C of atmospheric temperature, 7mg/100g or more GABA was formed and also free essential amino acid was developed well. Moreover, the steamed germ-retained rice sample was not inferior to the steamed milled rice sample in terms of taste value measured with a Taste Analyzer for cooked rice, and bacteria counts were not detected.View full abstractDownload PDF (3267K) -
Yongqiang CHENG, Naoto SHIMIZU, Toshinori KIMURA2004 Volume 66 Issue 3 Pages 98-104
Published: May 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThis study investigates the rheological properties and microstructure of MgCl2-coagulated tofu (Mg-tofu) to obtain useful information for hard tofu production in China. The rheological properties of Mg-tofu are affected by soymilk concentrations and coagulant concentrations. A low MgCl2 concentration (15mM) resulted in soft tofu gel; increasing the MgCl2 content produced a hard tofu. Increasing the protein content of soymilk also commonly increases the rupture stress of tofu. However, an excessively high concentration of MgCl2 caused a ductile rupture of tofu at low protein concentration. MgCl2 exhibited a relatively narrow optimal range for coagulation of tofu. The stress relaxation curve of Mg-tofu, similar to that of CaSO4 and glucono-delta-lactone (GDL), can be fitted with a four-element Maxwell model that includes two Maxwell models. The parameters obtained from the four-element Maxwell model, in particular the viscous parameters and stress relaxation times, increased with an increase of the protein content in soymilk. It is possible to produce Mg-tofu that has a similar rupture stress to that of commercial tofu in China. The narrow optimal range and its rapid reaction with soy protein may cause difficulties in handling during industrial hard tofu production using MgCl2; this might be improved by mixing it with GDL or CaSO4.View full abstractDownload PDF (4403K) -
Development of the Bale Wrapper and Working Rate of Harvesting and EnsilingHirokatsu SHITO, Nobuki YAMANA2004 Volume 66 Issue 3 Pages 105-110
Published: May 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe bale wrapper, which was able to load and wrap a fragile roll bale that formed from chopped material, was developed, following from the development of the roll baler, which was able to form a 90cm diameter roll bale from chopped maize in approximately 1cm particles. The operation of the developed bale wrapper by 22kW tractor was available. The loss produced at loading and wrapping was 0.3% on average. The power requirement for loading was 1.6kW. Furthermore, in the maize harvest test, it was possible for the two operators to harvest and wrap the maize smoothly by means of the newly developed roll baler and bale wrapper. The rate of work was 9.3a/h, when 44kW tractor and single row forage harvester were used for developed roll baler and 22kW tractor was for bale wrapper.View full abstractDownload PDF (7731K) -
Fundamental Studies for the Shape and the Arrangement of BladesTakashi GOTOH, Mitsuhiro HORIO, Tomohiko ICHIKAWA, Tomoo KOBAYASHI, Yu ...2004 Volume 66 Issue 3 Pages 111-120
Published: May 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSWe developed a rotary tiller that enables work at a higher speed by reducing the power requirement while maintaining almost equal work accuracy compared to conventional machines. Based on the results of this study, the high-speed rotary tiller has been commercialized and is utilized for tillage mainly in paddy fields. In this report, we presented the following test results. (1) The arrangement of blades for two cuttings per rotation was suitable for tilling paddy fields compared to three cuttings due to the low accumulation and holding of soil. (2) Though the power requirement was reduced by increasing the cutting width of the blade, improving the soil pulverizing performance was a major issue. (3) The soil pulverizing performance for the wider cutting width of the blade was improved by increasing the cutting angle of the rotary blade.View full abstractDownload PDF (6078K) -
Firmness Determination by an Impulse StrikingSadao OMORI, Akira HIRATA, Youichi NAKAMOTO, Osamu FUJIOKA, Hironoshin ...2004 Volume 66 Issue 3 Pages 121-126
Published: May 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSWe developed a device to evaluate by non-destruction firmness of pear (La-France). The device calculates the spring constant of the pear from its mass and the natural frequency number when vibrated lightly. The device is equipped with two kinds of hammers, and it is assumed that the device selects it by mass of a pear automatically. There is a certain characteristic in which the spring constant is different according to the firmness of the flesh of the pear. Finally, the pear can be judged if it is just right for eating, by comparing the measured data with the approximate type, which is already calculated.View full abstractDownload PDF (5554K) -
Shape and Soil Clay ContentIsao NISHIMURA, Tineke MANDANG2004 Volume 66 Issue 3 Pages 127-131
Published: May 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSRice production in Indonesia has been mainly paddy-field, not up-land cultivation. The use of neither tractor nor power tillers has not been widely spread. Manual soil preparation has been the staple method through all stages of rice cultivation. The initial preparation of the paddy-field is done with a hand hoe. A wooden moldboard plow drawn by buffalos is then used. After that a harrow is used for leveling the field as the final stage of soil preparation. This combination of hoe, plow and harrow is to be observed throughout the country.
Various types and shapes of plow are common. The shape of the moldboard plows is defined by sophisticated three-dimensional curving lines and are classified curve, half-curve and cylindrical type. A heavy twisting type of moldboard is not adopted in a clayey soil (N. Kawamura, 1951).
Designs are adapted to fit varying parameters such as soil constitution, soil water content and traditional modes of farming. In three districts near Bogor, we investigated the relation between the shape and type of moldboard plow in use and varying types of soil in the paddy-fields. The clay content appears to be the dominant determinant of plow shape.
We believe our study of the relation between plow form and soil type could contribute to the design of a standard moldboard plow.View full abstractDownload PDF (586K)
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