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Volume 70, Issue 1
Displaying 1-18 of 18 articles from this issue
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K. ARAYA2008 Volume 70 Issue 1 Pages 1-2
Published: January 01, 2008
Released on J-STAGE: November 01, 2012
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Tadashi CHOSA2008 Volume 70 Issue 1 Pages 4-7
Published: January 01, 2008
Released on J-STAGE: November 01, 2012
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Kunio TATEISHI2008 Volume 70 Issue 1 Pages 8-12
Published: January 01, 2008
Released on J-STAGE: November 01, 2012
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Katsuhiko TAMAKI2008 Volume 70 Issue 1 Pages 13-15
Published: January 01, 2008
Released on J-STAGE: November 01, 2012
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Mikio YASHIRO2008 Volume 70 Issue 1 Pages 16-19
Published: January 01, 2008
Released on J-STAGE: November 01, 2012
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Daisuke MIYAMA, Takuya ARAKI2008 Volume 70 Issue 1 Pages 20-23
Published: January 01, 2008
Released on J-STAGE: November 01, 2012
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H. KAINUMA2008 Volume 70 Issue 1 Pages 24-25
Published: January 01, 2008
Released on J-STAGE: November 01, 2012
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S. TAKAGI2008 Volume 70 Issue 1 Pages 26-28
Published: January 01, 2008
Released on J-STAGE: November 01, 2012
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K. HIROTA2008 Volume 70 Issue 1 Pages 29-33
Published: January 01, 2008
Released on J-STAGE: November 01, 2012
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2008 Volume 70 Issue 1 Pages 34-35
Published: January 01, 2008
Released on J-STAGE: November 01, 2012
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Chunfeng ZHANG, Youichi SHIBATA, Tadashi KISHIMOTO, Kazutaka UMETSU, K ...2008 Volume 70 Issue 1 Pages 45-54
Published: January 01, 2008
Released on J-STAGE: November 01, 2012
JOURNAL FREE ACCESSIn order to establish a supply system for energy resource coupled to the environment, the production technology of sugar beets was explored as a biological energy source. The results demonstrated that the planting technique, which involves a combination of no tillage and direct planting, was superior in extremely low-humic andosols of the Tokachi region in Hokkaido.
To look at the feasibility of economical energy production from sugar beets, an inventory analysis was made on indirect energy investments to produce ethanol from sugar beets. Data revealed that the energy cost of no tillage and a direct planting method was 10.5GJ/10 a on average for two years, while that of the conventional tillage method was 11.1GJ/10 a per year. The ratio of output to input showed that the direct planting with no tillage was more efficient (3.58) than the conventional tillage (2.96). Moreover, the emission of CO2 into the atmosphere with no tillage and the direct planting was 71% of the conventional tillage planting technique. Therefore, direct planting without tillage reduces the impact on the environment.View full abstractDownload PDF (1653K) -
Jun YOKOBORI, Katsuhisa NIWA, Noboru NOGUCHI2008 Volume 70 Issue 1 Pages 55-64
Published: January 01, 2008
Released on J-STAGE: November 01, 2012
JOURNAL FREE ACCESSThe objective of this research was to develop a method that can generate a wheat maturation map, when it is not possible to take a satellite image of the appropriate time. The research used information from geographic information system (GIS) database, such as sowing time, altitude, soil type distribution and organic matter content to estimate wheat maturation.
The model satisfactorily estimated wheat ear moisture content from altitude and organic matter with determination coefficients of 0.58 and 0.72 in two consecutive years.
Furthermore, a wheat ear moisture map was generated and harvesting time was estimated with an error or ±1 day; thus reducing drying cost while maintaining the quality of yield.View full abstractDownload PDF (9630K) -
Analysis of Winnow Mechanism on the Basis of Particle-Particle/Particle-Airflow Interaction (Part 1)Dispersion Characteristics of Paddy Grains/StrawsYuko FURUNO, Masami MATSUI, Eiji INOUE, Ken MORI, Takashi OKAYASU, Ryu ...2008 Volume 70 Issue 1 Pages 65-71
Published: January 01, 2008
Released on J-STAGE: November 01, 2012
JOURNAL FREE ACCESSIn order to improve the winnowing accuracy, it is important to elucidate the aerodynamic characteristics of grain and the other materials. This study covered paddy, and the dispersion characteristics of grains and straws affected by the cleaning wind were elucidated using test winnower.
The flight grains and straws were photographed, respectively, and the flight range was investigated using the developed image processing system.
Furthermore, when optimum winnowing accuracy was fulfilled, the distribution of mass and shape was investigated.
As a result, the particle coordinates of borderline region were obtained, and the optimum wind velocity could be predicted. In addition, it was considered that the influence on the winnow of project area was larger than that of mass.View full abstractDownload PDF (3312K) -
Kota MOTOBAYASHI, Tomoyuki YUKAWA, Makoto KOJIMA2008 Volume 70 Issue 1 Pages 72-78
Published: January 01, 2008
Released on J-STAGE: November 01, 2012
JOURNAL FREE ACCESSA round bale carrier has been developed for use with rice whole crop harvesters that increase total field capacity. The carrier is attached behind the harvester and carries one round bale during such operations as mowing and packing. A unique mechanism enables semi-automatic unloading of the carrier without power being supplied from the harvester. The simple construction of the carrier should promote its widespread use. Work time simulation and field testing demonstrated that its use increases total field capacity by up to 35%.View full abstractDownload PDF (5540K) -
Operation Using Long Mat-type Hydroponic SeedlingsYoshisada NAGASAKA, Hidefumi SAITO, Hisashi KITAGAWA, Kyo KOBAYASHI, M ...2008 Volume 70 Issue 1 Pages 79-84
Published: January 01, 2008
Released on J-STAGE: November 01, 2012
JOURNAL FREE ACCESSWe developed an automated rice transplanter by modifying a commercial 6-row transplanter. Steering, transmission, and the transplanting implement were controlled through a controller area network (CAN). A network real-time kinematic (RTK) geographical positioning system (GPS) receiver was used for locating position, and an inertial measurement unit was used for measuring the vehicle posture. We developed path planning, straight-line, and turning control programs. The transplanter made 9 back and forth traverses planting long mat-type hydroponic seedlings. The deviation from the desired straight path had a root mean square of 0.052m during operation.View full abstractDownload PDF (6305K) -
A Verification Test for Evaluating Reduction of Header Loss Using an Experimental Cutter BarNaonobu UMEDA, Eiji INOUE, Yutaka KANETANI, Yoshisada NAGASAKA, Takuo ...2008 Volume 70 Issue 1 Pages 85-91
Published: January 01, 2008
Released on J-STAGE: November 01, 2012
JOURNAL FREE ACCESSWe measured header losses under varied experimental conditions to investigate the relationship between the forward motion of stalks during the gathering process and header losses, and optimized the dimensions of the cutter bar and the combine settings. Next, in field tests on farms, we evaluated an experimental cutter bar designed to reduce header losses The results showed header losses, shatter loss and stalk loss to be correlated to the ratio of anti-cut area, lodging angular velocity and stalk motion angle during the displacement process. We determined the conditions needed to reduce the forward motion of the stalk during the gathering process based on the center of gravity speed as calculated from lodging angular velocity, and corrected for deflection during contact between knife and stalk. The results revealed the optimal guard pitch to be 50mm, knife angle 20°, and advance ratio of 1.03. We provisionally named the experimental cutter bar a “narrow-pitch cutter bar.” Header losses during use of the narrow-pitch cutter bar were approximately half those sustained using a conventional cutter bar for soybeans with lower stem heights.View full abstractDownload PDF (3696K) -
Tadashi CHOSA, Masaaki OMINE, Masaichiro WATANABE, Kan ARAKI, Atsuo NA ...2008 Volume 70 Issue 1 Pages 92-96
Published: January 01, 2008
Released on J-STAGE: November 01, 2012
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2008 Volume 70 Issue 1 Pages 97-
Published: 2008
Released on J-STAGE: November 28, 2012
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