Japanese Journal of Farm Work Research
Online ISSN : 1883-2261
Print ISSN : 0389-1763
ISSN-L : 0389-1763
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Volume 52, Issue 4
Displaying 1-5 of 5 articles from this issue
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Review
Original Paper
  • Development of a Fertilizer Application Device Capable of Producing and Pouring Liquid Fertilizer in Paddy Fields
    Takuya Mori, Shuhei Makabe, Tomohiro Iijima, Masatoshi Hirata, Shuich ...
    2017 Volume 52 Issue 4 Pages 155-166
    Published: 2017
    Released on J-STAGE: June 20, 2018
    DOIhttps://doi.org/10.4035/jsfwr.52.155
    JOURNAL FREE ACCESS
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    We have developed a liquid fertilizer application device that, utilizing irrigation water and inexpensive urea, can produce and apply the liquid fertilizer necessary for use in paddy fields onto the crop in a highly accurate manner. The drop flow rate of the fertilizer, and the nitrogen concentration rate, remained almost constant throughout field demonstration tests. After the fertilizer was applied, the leaf color, rice yield (calculated by crop cutting surveys) were the same as those achieved when a conventional fertilization method was used, namely, application of ammonium sulfate using a backpack-type spreader. In order to ensure accurate fertilizer application using irrigation water, it was necessary to first completely drain the field to expose the paddy, and to stop the flow of irrigation water after the application was complete.
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Research paper
  • Formulation of the Process and Estimating of the Energy Required for Harvesting and Drying of the Shelled Corn in the Paddy Field Areas
    Ichiro Inano, Kota Ishii, Yoshiaki Kimura, Hideyuki Takenaka
    2017 Volume 52 Issue 4 Pages 167-178
    Published: 2017
    Released on J-STAGE: June 20, 2018
    DOIhttps://doi.org/10.4035/jsfwr.52.167
    JOURNAL FREE ACCESS
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    The energy required for harvesting and drying of shelled corn was estimated using the potential workable number of days for a grain-maize combine harvester predicated on the drying rate and the rate of harvesting in the paddy field areas. A harvester with an attached maize header and far-infrared radiation grain dryer for 14.4 m3 of shelled corn drying were used. The results of the simulation show that the moisture content of the shelled corn alters the duration of the process from 2 days to 1 day with 3 driers owned by a corporate farm versus 4 driers owned by 4 family farms. From the relationship between the moisture content at the start of the harvest of the corn and the total energy consumption, the energy required in the harvesting and drying processes increase when the moisture content of the shelled corn decreases below 30％. However, it was found that the energy required in the harvesting and drying processes decrease when the period of the process changes from 2 days to 1 day.
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  • Selecting Suitable Grape Varieties for a Rural Work Experience Program with a Container Growing System
    Akihiro Hosomi
    2017 Volume 52 Issue 4 Pages 179-186
    Published: 2017
    Released on J-STAGE: June 20, 2018
    DOIhttps://doi.org/10.4035/jsfwr.52.179
    JOURNAL FREE ACCESS
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    This study was designed to select grape varieties suitable for cultivation by beginners in a rural work experience program. Five grape varieties, ‘Campbell Early’, ‘Red Port’, ‘Steuben’, ‘Muscat Bailey A’, and ‘Neo Muscat’, were compared for ease of cultivation and fruit productivity. The vines were grown in 10-liter containers during the 1st year and in 50-liter containers during the 2nd–3rd years, under condition of shelter from rain. They were trained by unilateral horizontal cordon training with spur pruning. The uniform shoot growth of ‘Red Port’ and ‘Steuben’ was well suited to pattern working. The weaker shoot growth of ‘Muscat Bailey A’ meant that less labor was needed for shoot management. After 2nd year the shoots of all varieties, apart from ‘Neo Muscat’, bore flower clusters. The greater berry setting proportion of ‘Steuben’ gave rise to compact and well-regulated clusters. More insect pests attacked ‘Campbell Early’, ‘Red Port’ and ‘Steuben’, and it was necessary to control them. More diseases occurred in ‘Muscat Berry A’ and ‘Neo Muscat’, but were unimportant and no action was needed. Laborsaving plant protection is likely to be needed for ‘Muscat Berry A’ and ‘Neo Muscat’, if grow under rain shelter to inhibit disease. It emerged that, ‘Steuben’ and ‘Muscat Bailey A’ were the varieties of grape best suited to cultivation by beginners.
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