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Volume 66, Issue 1
Displaying 1-18 of 18 articles from this issue
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T. KITA2004 Volume 66 Issue 1 Pages 1-2
Published: January 01, 2004
Released on J-STAGE: April 30, 2010
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Takashi OONO2004 Volume 66 Issue 1 Pages 4-7
Published: January 01, 2004
Released on J-STAGE: April 30, 2010
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Utilization of Biogas from Livestock WasteJuzo MATSUDA2004 Volume 66 Issue 1 Pages 8-11
Published: January 01, 2004
Released on J-STAGE: April 30, 2010
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Masayuki YAMADA2004 Volume 66 Issue 1 Pages 12-16
Published: January 01, 2004
Released on J-STAGE: April 30, 2010
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Yasuhiro HARADA2004 Volume 66 Issue 1 Pages 17-20
Published: January 01, 2004
Released on J-STAGE: April 30, 2010
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Yoshiyuki ABE2004 Volume 66 Issue 1 Pages 21-25
Published: January 01, 2004
Released on J-STAGE: April 30, 2010
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Masami MATSUI, Eiji INOUE, Tomoko KUWANO, Ken MORI2004 Volume 66 Issue 1 Pages 43-48
Published: January 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe effectiveness of winnowing in the threshing unit can be improved by considering the trajectory of the grain and chaff, and then adjusting the flow of air accordingly. In this study, we aimed to understand the trajectory of a grain of paddy. We examined variations in the drag and lift coefficients due to variations in the direction of the grain. The results confirm that the drag and lift coefficient can be expressed as a trigonometric function of the direction. And we established equations to determine the trajectory in a two-dimensional plane. Terminal velocity was obtained from these equations. The results can be considered a reasonable value.View full abstractDownload PDF (883K) -
Masami MATSUI, Eiji INOUE, Tomoko KUWANO, Ken MORI2004 Volume 66 Issue 1 Pages 49-54
Published: January 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn order to clarify the trajectory of a grain of paddy blown by the wind from a winnower, the trajectories in a wind tunnel with a known wind velocity were photographed. The solutions to the dynamic equations were obtained by using the Runge-Kutta method. It was found that it was possible to simulate the trajectory of a grain of paddy, and to forecast the range of trajectories using the initial velocities. It was also found that a sphere that can reproduce the trajectory of the grain of paddy has ad mass to projected area ratio of 1.00kg/m2. It is possible to reproduce the trajectory of a grain of paddy using a sphere made of a readily available resin.View full abstractDownload PDF (2814K) -
Experimental Results of Running on Paddy FieldYoshinobu NISHIIKE, Mikio UMEDA2004 Volume 66 Issue 1 Pages 55-65
Published: January 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDevelopment of new model-following control for a farm vehicle were discussed in Part. 3. In this paper, experimental results of running on a paddy field with the control are presented. The running tests were done on the field just after tilling and just after puddling. The result clearly shows that the side velocity and the yaw angular velocity of the test vehicle followed reference model quickly and stably with this developed control system. Furthermore, the system attenuated the influence on the motion of the vehicle due to unevenness of the field in order that it could run straightly in 40m steady running tests without divergence. The directional stability was improved with the system considering that the mean width of meandering was 0.24m.View full abstractDownload PDF (1299K) -
Hussain SOROUR, Toshitaka UCHINO2004 Volume 66 Issue 1 Pages 66-74
Published: January 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSCarbon dioxide evolution was used to determine the respiration rate and carbon dioxide production per unit mass of soybean at different storage temperature and moisture content. Treatments included soybean moisture content of about 14, 18, 22 and 26% (wet basis), stored in temperature of about 15, 20, 25, 30, cycling from 15 to 25 and cycling from 20 to 30°C on a 24h basis. The results indicated that, increasing respiration of soybean by increasing storage temperature and moisture content. However, the respiration of soybean seems to be constant with the storage time at low storage temperature. Relations of carbon dioxide production from soybean seeds versus storage time were fitted. This relation seems to be polynomial equation. Storage temperature was the most important effecting factor on the respiration of soybean. An increase in the storage temperature leads to an increase in the respiration rate of soybean per unit mass of dry matter.View full abstractDownload PDF (1161K) -
Kiwamu SHIIBA, Noriko KOMINE, Ken KANZAKI, Toshinori KIMURA2004 Volume 66 Issue 1 Pages 75-81
Published: January 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSUsing SCR (small-scale composting reactor), cattle manure was bio-degraded and composted. The heat and CO2 generation increased, as processing of compost. During composting all 16SrDNA of microorganisms was directly extracted from the composted matter by SCR and analyzed by ARDRA (Amplified Ribosomal DNA Restriction Analysis). It was found that CO2 generation was not related with the number of microorganisms living in the matter but rather with the changing of microorganism flora. When the cattle manure was composting, the addition of a little wheat bran to composting matter accelerated the generation of CO2 and heat, causing significant changes in the microorganism flora.View full abstractDownload PDF (8160K) -
A Prototype of Rootstock Cutting Device for Cleft GraftingShinya MORIKAWA, Yoshifumi NISHIURA, Tateshi FUJIURA, Yuji TAKAURA2004 Volume 66 Issue 1 Pages 82-89
Published: January 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn order to save the grafting work, simple grafting devices were developed. Since a cleft grafting method is widely performed in the fruit vegetable cultivation, especially at eggplant farmhouses, the devices were designed following the grafting method.
In this report, a prototype of the rootstock cutting device was developed. It cut off the seedling upper part horizontally and cut the hypocotyl vertically. The cutting accuracy was equal or higher than that of the manual operation under any conditions of diameter, hardness of the hypocotyl. Time required per one seedling was about 10 seconds, that was about 60% of the manual grafting. The device was also practical in the operation efficiency.View full abstractDownload PDF (4141K) -
Principles and Equipments of No-Tillage Dibber PlanterKazuhiro MATSUMORI, Masahiko SAIGUSA, Toyoaki ITO2004 Volume 66 Issue 1 Pages 90-97
Published: January 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSA trial no-tillage libber planter for soybean was produced. The drum with the libbers on the outer surface at every 20° was rotated by the traction, and created sowing hollows. The traction resistance was not changed so much even though the traction speed was changed. And almost same sizes of libber hollows were made at same hill distances. The disturbed rate of the field's surface decreased to 4.7% compared with conventional sowing system. The cultivation system which the seed and CAF (Controlled Availability Fertilizer) were set alternatively, the yield was expected to increase compared with quick acting fertilizer using system. The trial no-tillage libber planter contributes to reduce the environmental load by decreasing the traction load of the working time, and the disturbed rate of the field's surface.View full abstractDownload PDF (3327K) -
Yoshiyuki HARA, Hideyuki TAKENAKA, Kenji SEKIGUCHI, Masahiro ENDOH2004 Volume 66 Issue 1 Pages 98-103
Published: January 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSWe advanced development of the variable rate fertilizer applicator (VRFA) for row crops as sugar beets and beans. VRFA could be operated with the application map, the tractor position and the speed measured by RTK-GPS. Nitrogen and phosphate application maps were made by soil nitrogen and phosphoric acid samples taken from the grid size 25m×25m. The amount of N for the variable application area is set at 80%, whereas 100% for the constant rate application area. As to P, both areas are set at 100%. The results of the corrected sugar yield in both areas were almost the same and even.View full abstractDownload PDF (3925K) -
Microorganism Control Using Ultraviolet IrradiationKotaro KUBOTA, Yasuyuki HIDAKA2004 Volume 66 Issue 1 Pages 104-108
Published: January 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThis research aims at developing the drying and storage equipment that controls microorganism that cause degradation of grain quality, eco-friendly and safely without post-harvest application.
In this paper, we sterilized microorganism that adhere to the grain surface using ultraviolet radiation. We used a experimental equipment that irradiates ultraviolet radiation while mixing grain. As a result of sterilization experiment for the dry rough rice and the dry wheat, it was required for 26 to 55 hours to sterilize 90% of microorganism that adhere to the grain surface under condition of 5.3W/m2 ultraviolet irradiance. As a result of germination test, we could not accept degradation of grain quality by ultraviolet irradiation.View full abstractDownload PDF (2945K) -
Microorganism Control Using Ultraviolet Irradiation and TiO2Kotaro KUBOTA, Yasuyuki HIDAKA2004 Volume 66 Issue 1 Pages 109-114
Published: January 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn this paper, in order to obtain the condition of practical ultraviolet sterilization, we made a recirculating grain sterilization equipment using ultraviolet irradiation. We investigated the ultraviolet sterilization of microorganism that adhere to the wheat surface. And we examined the quality of those wheat. Moreover, we investigated the sterilization using titanium dioxide attracted attention as a photocatalyst and ultraviolet irradiation.
As a result of sterilization experiment, sterilization time required in order to obtain the sterilization rate of 90% was 6.3hours for bacteria and 5.6hours for fungi under condition of 97W/m2 ultraviolet irradiance. In this experiment using ultraviolet irradiation and titanium dioxide, sterilization time required to obtain the sterilization rate of 90% was 4.8hours for bacteria and 4.5hours for fungi. We could shorten the sterilization time. In the quality examination, it was thought that there was little influence on quality by ultraviolet irradiation in this range from the germination test and the amylograph examination.
As a result of calculating ultraviolet radiant energy for 30t of grain, it was estimated as 84MJ.View full abstractDownload PDF (6541K) -
The Effect of Soaking Conditions of Brown Rice on Formation of GABA ComponentToshiko SATAKE, Takeshi FUKUMORI, Houging LIU, Motonobu KAWANO, Yasuhi ...2004 Volume 66 Issue 1 Pages 115-121
Published: January 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe aim in this paper is to develop a processing technology for rice with high functionality as a staple food, investigating on the effects of water soaking conditions of brown rice on the amounts of formed GABA (γ-amino butyric acid) and free essential amino acids and the contents of vitamin B1 and mineral Mg in rice kernels. The principal objective is to elucidate the process conditions of soaking. A series of subsequent processes of evaporation heating, humidified hot air heating, ventilation cooling, rice milling, and ventilation drying were operated under the same conditions. As the results, the amounts of formed GABA and free essential amino acids differed significantly with the soaking conditions, and that the contents of vitamin B1 and mineral Mg in parts of the kernel varied. It was confirmed that under the conditions of sample being soaked in 30°C of water for 2hours, draining the water, and being left for 22hours in 30°C of atmospheric temperature while keeping the water-absorbed brown rice not to dry out, GABA and free essential amino acids increased most remarkably, and vitamin B1 and mineral Mg migrated into the endosperm.View full abstractDownload PDF (3298K) -
Kazuto SHIGETA, Osamu YUKUMOTO, Kunio TATEISHI, Wen Le2004 Volume 66 Issue 1 Pages 122-126
Published: January 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSSeedlings grown up in a open field are utilized on spring cabbage production in Kanagawa Pref. Then sorting the seedlings into several ages or sizes is indispensable because the seedling age and its size are not uniform. High correlation coefficient between the seedling ages and total length of cabbage seedlings was observed. We have developed two kinds of measuring instruments for sorting cabbage seedlings. The means of an electrostatic capacitance instrument using parallelplate condenser was able to classify cabbage seedlings into several length. And the seedling size measuring device using infrared sensors was also able to classify them with accuracy.View full abstractDownload PDF (5974K)
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