Japanese Journal of Farm Work Research
Online ISSN : 1883-2261
Print ISSN : 0389-1763
ISSN-L : 0389-1763
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Volume 51, Issue 2
Displaying 1-5 of 5 articles from this issue
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Original Paper
  • Effectiveness of four electric fences for preventing Sika deer entry into meadows
    Hideharu Tsukada, Keisuke Ishikawa, Tamaki Kida, Norihiro Shimizu, Mas ...
    2016 Volume 51 Issue 2 Pages 39-49
    Published: 2016
    Released on J-STAGE: February 07, 2017
    DOIhttps://doi.org/10.4035/jsfwr.51.39
    JOURNAL FREE ACCESS
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    The effectiveness of four electric fences (4-polywire and 5-polywire fencing, high-tensile wire fencing, and woven polywire mesh fencing) designed to deter Sika deer from entering into meadows was assessed. Frequencies of deer entry into meadows observed using remote cameras were significantly lower in meadows with electric fences than in the meadow with no electric fence. The woven polywire mesh and high-tensile wire fencing exhibited particularly better exclusion of Sika deer than 4-polywire and 5-polywire fencing. The effect of the woven polywire mesh fencing lasted for more than 4 years. These fences are sufficiently strong to withstand pressure from deer. Moreover, in the case of high-tensile wire fencing, an outrigger wire position and its configuration was suitable for giving aversive stimuli to deer touching the fence. Considering the cost performance of its long term use, the installation of durable high-tensile electric fencing equipped with a top wire at more than 140 cm height and with the outrigger wire at 45 cm height is recommended for preventing Sika deer incursions into meadows.
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Research paper
  • Shoot growth and fruit productivity of 'Masui Dauphine' Fig (Ficus carica L.) Having High Limb Position with Horizontal Bearing Shoots and Renewal Long Pruning
    Akihiro Hosomi, Takeshi Isobe, Yuka Miwa
    2016 Volume 51 Issue 2 Pages 51-58
    Published: 2016
    Released on J-STAGE: February 07, 2017
    DOIhttps://doi.org/10.4035/jsfwr.51.51
    JOURNAL FREE ACCESS
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    Optimal positioning and pruning of bearing shoots were investigated in the ’Masui Dauphine’ fig trees, having high limb straight-line (HLSL) training (Hosomi et al., 2013). In a comparison of bearing shoot positions between horizontal and downward, thicker bearing shoots with more lateral shoots were observed in the horizontal position. Fruits that ripened earlier, were larger, or had greater color with higher soluble solids content (SSC) , were obtained from some nodes of bearing shoots in the horizontal position. Furthermore the growth and fruit production of the trees of (a) HLSL with renewal long pruning (Hosomi et al., 2015) , were compared against trees having (b) conventional low limb straight-line style training with short pruning. No clear difference between (a) and (b) was observed in the size of bearing shoots, the abundance of lateral shoots, the number of fruit set, or the estimated yield, but these were difference in the qualities of the fruits. In 2009, larger fruits at the 3rd nodes of bearing shoots and less colored fruits at the 18th nodes were obtained from trees in category (a) with downward bearing shoot position than from trees (b). In 2010, larger fruits with higher SSC at the 3rd and 8th nodes, and greater fruit color at the 3rd and 13th nodes were obtained from trees in category (a) with horizontal bearing shoot position than from trees (b). To summarize these results, the horizontal position is better for the bearing shoot of HLSL trees, because the quality of some fruits is greater than with downward positioning. Furthermore a high quality fruits of the ‘Masui Dauphine’ fig were obtained from HLSL trees combining the horizontal bearing shoot positioning and the renewal long pruning.
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  • Effects of Water Table Control on Growth of Spring- and Summer-sowing Carrot
    Kentaro Matsuo, Takehiko Yamamoto, Atsushi Yamasaki
    2016 Volume 51 Issue 2 Pages 59-68
    Published: 2016
    Released on J-STAGE: February 07, 2017
    DOIhttps://doi.org/10.4035/jsfwr.51.59
    JOURNAL FREE ACCESS
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    The effects of water table control on the growth of spring- and summer-sown carrots were evaluated in a field with andosol soil. Carrot cultivars, 'Koyo-2-gou' for spring-sowing and 'Hamabeni-5-sun' for summer-sowing, were grown on ridges of width 70 cm and height 12 cm. Treatments of water table control were as follows: (1) maintained at 15 cm below the ridge surface until seedling emergence (i.e. USE15) and (2) maintained at 42 cm below the surface after USE15 (i.e. M42) , (3) maintained at 52 cm below the surface after USE15 (i.e. M52) , (4) maintained at 52 cm below the surface for one month after USE15 (i.e. M52M) and (5) not controlled (Control). The seedling emergence rate was higher for treatments with the water table controlled than for the Control. At the five-leaf stage, the growth of Control and USE15 were less than for M42 and M52 treatments. For spring-sowing, the root weight at harvest time was higher for M52 than the Control treatments. Furthermore, when there was heavy rainfall, the incidence of root cracking was lower for M52 than the other treatments because of much less fluctuation in soil moisture for M52. Even when the water table was controlled, the root form was long and thin when the temperature in the later growth stage was high, as the root form depends on temperature. For summer-sowing, the treatment of water table that were maintained at 52 cm depth were discontinued when it rained after about one month passed since the treatment was started; however, any further rain after this time did not result in injury from excess-moisture and root weight was increased. The incidence of root cracking was low even for treatments in which the water table was temporarily controlled.
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