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Volume 65, Issue 1
Displaying 1-26 of 26 articles from this issue
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K. MOHRI2003 Volume 65 Issue 1 Pages 1
Published: January 01, 2003
Released on J-STAGE: April 30, 2010
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Naoki YOSHIMURA2003 Volume 65 Issue 1 Pages 4-6
Published: January 01, 2003
Released on J-STAGE: April 30, 2010
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Hiroshi YOSHIOKA2003 Volume 65 Issue 1 Pages 7-10
Published: January 01, 2003
Released on J-STAGE: April 30, 2010
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Raising Seedling, Transplanting and ManagementKimio MURATA2003 Volume 65 Issue 1 Pages 11-15
Published: January 01, 2003
Released on J-STAGE: April 30, 2010
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Harvest workHideo KAINUMA2003 Volume 65 Issue 1 Pages 16-20
Published: January 01, 2003
Released on J-STAGE: April 30, 2010
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Post-harvest Machinery of VegetablesSadao OMORI2003 Volume 65 Issue 1 Pages 21-23
Published: January 01, 2003
Released on J-STAGE: April 30, 2010
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Y. KAWAMURA2003 Volume 65 Issue 1 Pages 24-26
Published: January 01, 2003
Released on J-STAGE: April 30, 2010
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Y. HONDA2003 Volume 65 Issue 1 Pages 27-29
Published: January 01, 2003
Released on J-STAGE: April 30, 2010
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2003 Volume 65 Issue 1 Pages 51c
Published: 2003
Released on J-STAGE: April 30, 2010
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2003 Volume 65 Issue 1 Pages 51a
Published: 2003
Released on J-STAGE: April 30, 2010
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2003 Volume 65 Issue 1 Pages 51b
Published: 2003
Released on J-STAGE: April 30, 2010
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GIS Mapping for Agricultural Land InformationRyo SUGIURA, Noboru NOGUCHI, Kazunobu ISHII, Hideo TERAO2003 Volume 65 Issue 1 Pages 53-61
Published: January 01, 2003
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe objective of this study is to develop a system that can generate a map regarding crop status obtained by an imaging sensor mounted on an unmanned helicopter. As for the unmanned helicopter used in this research, an RTK-GPS was adopted as a positioning sensor, and an inertial sensor that provides posture (roll and pitch angles) was installed in the helicopter. Moreover, a geomagnetic direction sensor (GDS) that outputs an absolute direction is also equipped with the helicopter. When obtaining the image by the imaging sensor on the helicopter, some distortions caused by change of helicopter's posture arise in the image. In order to remove this distortion, geometric correction by converting from image coordinate to global coordinate is badly needed. But there are errors in posture data. Particularly, large GDS error was caused by warp of geomagnetism surrounding the helicopter. Therefore the method of correction of GDS errors was developed in the study. As the result, it was possible to generate a map including maximum error of 41cm using the image taken from the helicopter.View full abstractDownload PDF (8216K) -
Toshikazu KAHO, Michihisa IIDA, Mikio UMEDA, Choung Keun LEE2003 Volume 65 Issue 1 Pages 62-68
Published: January 01, 2003
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSRice plant absorbs nutrition from soil and fertilizer, and then it produces grain and straw. Therefore, in order to investigate the relationship between the growth of rice and the absorbed nutrition, it is necessary to measure the grain and straw yield. In this study, a measuring system for the straw yield using a knotter was fabricated to measure it while a combine is harvesting rice. Field tests were conducted using this measuring system. The dry mass of a bunch of straw bound by knotter did not depend on the straw moisture, but on the speed of combine. The straw yield map was calculated by compensating the dry mass of the straw bunch according to the speed of combine (0.35-0.94m/s).View full abstractDownload PDF (5056K) -
Toshikazu KAHO, Michihisa IIDA, Choung Keun LEE, Mikio UMEDA2003 Volume 65 Issue 1 Pages 69-77
Published: January 01, 2003
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn order to control rice growth and make grain yield uniform and high by precision farming, it is necessary to measure and analyze the relationship among growth index of rice plant and grain and straw yields. In this research, the growth of rice plant and the grain and straw yields were measured in the same paddy field during two years. Based on the data, spatial variability of grain and straw yields was analyzed by geostatistical method, and then the straw yield map was made by Kriging. Mean of straw yield was 6.8t/ha and CV was 9.53%. The range that indicates spatial variability was 13m.View full abstractDownload PDF (7393K) -
Economical Evaluation of BIOCGS by a Profitable ModelJong-Soo PARK, Hideo TERAO, Kohta ISHII2003 Volume 65 Issue 1 Pages 78-84
Published: January 01, 2003
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe economical evaluation of biogas cogeneration systems (BIOCGS) is important for the installment and spread of the systems in rural districts. This paper was intended to establish a simple calculation model of profit. As the result of evaluation, it became clear that the higher charge of electric power, the lower charge of gas oil and biogas, and the higher performance of the systems have critical limitation, respectively. To put it concretely, when a dairy farmer of 100 cows equipped with 20kW (72MJ/h)-BIOCGS, the profit index comes to 480, 000yen/kWh per one year. If the total cost of the systems is about 9.6 million yen, it can be said that the recovery of the invested capital makes possible in 15 years. The reduction of carbon dioxide of 87, 000kg, which 3.0ha of the beech wood absorbs per year, can be expected using BIOCGS, tooView full abstractDownload PDF (1012K) -
Hitoshi HOMORI, Kenshi SAKAI, Akira SASAO, Sakae SIBUSAWA2003 Volume 65 Issue 1 Pages 85-90
Published: January 01, 2003
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe simulator developed in this paper aims to simulate the dynamics of the tractor-implement system in various parameter conditions, and investigate the stability of a tractor implement system for the on-road transportation. Simulated data sets and experimented data sets were compared in the numerical experiment. By using Modified Footprint Tire Model, the accurate description of generated shock vibration to a road surface input was attained. In the parameter study, it was shown that a front wheel was easy to jump on the on-road running, when tractor mass became relatively small to implement.View full abstractDownload PDF (845K) -
Atsushi ODA, Minoru YAMAZAKI, Akira OIDA2003 Volume 65 Issue 1 Pages 91-98
Published: January 01, 2003
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn order to develop a decentralized energy production system with low environmental impacts, we constructed a methane fermentation system for agricultural biomass with photovoltaic solar cells as a subsidiary operating energy resource. The experimental run of this system showed that almost all the energy required for running it could be supplied by solar energy from photovoltaic cells through a year. In this paper, a simulation model was examined on the energy consumption for running the reactor and the generated energy by photovoltaic cells. As the result, the simulated value obtained from the model gave good agreement with the measured value of the experiment, and the model proved to be useful for practical use.View full abstractDownload PDF (3576K) -
Inspection of the travel resistance simulation based on the measurement of the load acting on the track rollersShigeki INABA, Eiji INOUE, Muneshi MITSUOKA, Koichi HASHIGUCHI, Takaak ...2003 Volume 65 Issue 1 Pages 99-105
Published: January 01, 2003
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSWe reported about the rolling resistance of track rollers on the rubber crawler (Part 1). We also proposed the simulation method for travel resistance based on the dynamic model due to rolling resistance and estimated the relationship between the simulation results and fluctuations of the power requirement of rubber crawler vehicle that might have a close relationship with travel resistance in part 2. In order to further investigate the validity of the travel resistance simulation, it is necessary to measure the forces acting on track rollers that are caused by the travel resistance of the track rollers on the rubber crawler. In this paper, the measuring system of the forces acting on the track rollers of a traveling vehicle was proposed. Furthermore, validity of the prediction of travel resistance was inspected through the comparison with measured results. As a result, the simulation would be able to estimate an influence of the travel resistance caused by the difference of the arrangement of the track rollers given as the experimental condition.View full abstractDownload PDF (909K) -
Enhancement of Heading Angle Accuracy using Vibrating GyroscopeAkira MIZUSHIMA, Noboru NOGUCHI, Kazunobu ISHII, Hideo TERAO, Yousuke ...2003 Volume 65 Issue 1 Pages 106-114
Published: January 01, 2003
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe objective of this research is to develop an automatic guidance system composed of relatively low cost sensors. As a navigation sensor, we used a geomagnetic direction sensor (GDS) and a gyroscope. In this paper, the precise estimation method of the vehicle orientation was proposed. First, the noise of inclinometer were eliminated by an adaptive line enhancer (ALE). Second, the drift error of the gyroscope was estimated by a least square method (LSM). Third, these sensors output were integrated to obtain the accurate vehicle orientation. Finally, to evaluate the accuracy of the proposed estimation method of orientation, the automatic navigation test was carried out in the actually used field. As a result of the automatic navigation test, it was confirmed that the proposed estimation method had the ability to navigate the mobile vehicle with high accuracy.View full abstractDownload PDF (3300K) -
Yasuhiro TANIMURA, Junji HIROTSUJI, Keiichi TANAKA, Toshikazu ASAKURA2003 Volume 65 Issue 1 Pages 115-129
Published: January 01, 2003
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSWe have investigated the fungicidal characteristics by the combined gas of negative air ions and ozone and its applicability to preserving fruits. Basic experiments showed that the fungicidal efficiencies of Aspergillus niger spore on agar were increased dramatically by combining negative air ions of 3.0×1012 ions/m3 and ozone of 0.05ppm under the temperature of 293K and relative humidity of 90%, while very low fungicidal efficiencies were obtained from individual treatments by the same concentration of negative air ions or ozone. Experimental results revealed that the fungicidal method using both negative air ions and ozone was applicable to preserving fruits because the growth of fungi on grape was suppressed without exerting a bad influence upon grape.View full abstractDownload PDF (6630K) -
Jun KUBOTA, Tatsuya KONISHI2003 Volume 65 Issue 1 Pages 130-135
Published: January 01, 2003
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSFor Labor-saving of the work in rice transplanting with mat seedling, the authors purpose transplanting 2-3plants per hill with uniformity and planned arrangement of seedlings. In this paper, using the present rice transplanter, we investigated transplanting with small area of a hill from mat seedling. As a result, we made sure that reducing the number of seedlings by half cause the increase of missing hill. In addition, when the lengths of seedlings decrease, it brings to the decrease of plants number per hill. To reduce the missing hills, we discussed a new planting finger and used it in field. We made sure the new planting finger is effective to reduce the missing hills.View full abstractDownload PDF (3237K) -
Detection of planted seedling and control of seedling feedingJun KUBOTA, Tatsuya KONISHI2003 Volume 65 Issue 1 Pages 136-142
Published: January 01, 2003
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe objective of this research is to control the quantity of seedling for rice transplanter. In the part1, we reported the transplanting with small area of a hill from mat seedling. In this paper, we developed the used seedling detector and the hill space detector, and we tested them in fields. As the result, they fulfilled the requirement for the detector. We made sure that it could reduce the number of seedlings for transplanting to control quantity of seedling by the lengths of mat seedlings.View full abstractDownload PDF (2746K) -
Regional Adaptability of Developed SeederYoh NISHIMURA, Kazunobu HAYASHI, Takashi GOTOH, Mitsuhiro HORIO, Tomoh ...2003 Volume 65 Issue 1 Pages 143-151
Published: January 01, 2003
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThis study was carried out to develop precision direct drill Seeder with controls of seed depth for direct sowing of rice on paddy field. This performance will exert influence on the stable germination by decreasing an inappropriate germination. The developed 8-row or 10-row seeders were investigated in the regional adaptability tests to support commercial enterprise of the developed seeders smoothly. These seeders were evaluated by user about the operational performance and the durability. The result were summarized that the developed machine have worked many fields under high accuracy, and some improvement points were cleared. The developed Seeder was put on to the market in spring 2000.View full abstractDownload PDF (4278K) -
On Development of Driving SystemYuji NAGASAKI, Mizuo NONAKA, Hiroki KAWASHIMA, Seiichi IZAWA, Junichi ...2003 Volume 65 Issue 1 Pages 152-158
Published: January 01, 2003
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSA monorail type spraying carrier for small-size multiple-span greenhouses for areas under 10 a. was developed. The carrier, which is driven by a DC motor, automatically travels hanging from a rail attached under the beam of greenhouses. The carrier is moved manually to the next span rail by a cart which moves while hanging from the hanger-rail. A power sprayer and spraying hose, which the farmer owns, can be attached to the carrier; one carrier can be utilized in all greenhouses the farmer may manage. Sprayer field capacity was about 2.5 times that of manual spraying using a power sprayer.View full abstractDownload PDF (3573K) -
Poritosh ROY, Naoto SHIMIZU, Singo FURUICHI, Toshinori KIMURA2003 Volume 65 Issue 1 Pages 159-166
Published: January 01, 2003
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSLaboratory scale studies were conducted to improve the traditional parboiling process. Different steaming treatments were given to the paddy with a rice cooker under open and covered conditions. The energy consumption in parboiling, qualities of parboiled rice and the material temperature during pre-steaming, soaking and steaming were measured. The moisture content of parboiled paddy and hardness of parboiled brown rice at different steaming intervals were also measured for inside and surface layers. Faster rise of material temperature during pre-steaming and steaming, and slower material temperature drop during soaking were observed under the covered method. The hardness of parboiled brown rice was higher for the bottom layer than the surface layer and the covered method provided higher value with even less amount of energy being consumed compared to the open method. There is no difference in overall quality indices between two methods. The experimental results reveal that the traditional parboiling process can be improved to reduce energy consumption by adopting the covered method.View full abstractDownload PDF (5269K) -
Kohei TASAKA, Satoshi YOSHINAGA, Ken-ichi MATSUSHIMA, Kenzo WAKIMOTO2003 Volume 65 Issue 1 Pages 167-176
Published: January 01, 2003
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSA saw-toothed seed accelerating disk and the disk case were redesigned and the necessity of the second brush on a seed feeding roll was tested to improve the form of hill-seeded spot, one of the seeding accuracy of shooting hill-seeder of rice combined with a paddy harrow. It proved to be important to minimize spatial range of seeds dropped from a seed feeding roll and seed rebound rate from a saw-toothed seed accelerating disk to decrease the size of a hill-seeded spot. The former and the latter improvement resulted that the form of hill-seeded spot became 6.4cm from 9.7cm and the rate of hill-seeded spot of 10cm or less became 92% from 55%.View full abstractDownload PDF (3694K)
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