Japanese Journal of Farm Work Research

Original Papers

Effects of Partially Shallow Tilling and Sowing Method on the Growth and the Yield of Soybean (Glicine max L.) in Upland Filed Converted from Paddy Field

Yoshiteru KAWAMURA, Koji ODAWARA, Muneshi MITSUOKA, Eiji INOUE, Takash ...

2013 Volume 48 Issue 2 Pages 49-59
Published: June 20, 2013
Released on J-STAGE: December 20, 2013

DOIhttps://njjn-jsjc-gov-cn-s-1416.res.gxlib.org.cn:443/rwt/1416/https/MSYXTLUQPJUB/10.4035/jsfwr.48.49

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The study was conducted to establish the par-tially shallow tilling and sowing (PSTS) method by using the modified rotary in order to plow and sow under the highly humid soil conditions. The modified rotary was replaced rotary helloes of sowing parts of which with cultivator blades. The study evaluated the emergence rate, the growth and yield of soybean, when the PSTS method was used. The results showed that the emergence rate was higher in PSTS method re-gardless of how much or little it rains. In addi-tion, the main stem length was longer, the lowest podding position was higher, and yield was also higher with PSTS method than those with usual method.

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Improvement of a Mechanical Weeding Technique in a Paddy Field where a Large Number of Monochoria vaginalis and Schoenoplectus juncoides Emerged : Development of a Mechanical Weeding Technique for Intra-row Spaces

Joe NAKAI, Satoshi TORITSUKA

2013 Volume 48 Issue 2 Pages 61-67
Published: June 20, 2013
Released on J-STAGE: December 20, 2013

DOIhttps://njjn-jsjc-gov-cn-s-1416.res.gxlib.org.cn:443/rwt/1416/https/MSYXTLUQPJUB/10.4035/jsfwr.48.61

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Rice bran treatment of soil surfaces in paddy fields does not adequately control two weeds, Monochoria vaginalis (Pontederiaceae) and Schoenoplectus juncoides (Cyperaceae). After changing the arrangement of the rotor in a walking culti-vator, we examined the effect of weeding the intra-row spaces on the control of weeds in com-bination with rice bran treatment. In rice paddy fields where many of these residual weeds emerged after rice bran treatment, weeding the intra-row spaces twice reduced not only M. vaginalis and S. juncoides in the row spaces but also S. juncoides in the intra-row space. Compared to the weed-suppressive technique of rice bran treatment alone, the combination of rice bran treatment and weeding the intra-row space twice preserved paddy rice yields by more effectively controlling weeds.

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A Short Leaf Sheath Cultivation System for the Bunching Onion (Allium fistulosum L.) Cultivar ‘Shonan Ippon’

Akitsugu KOIZUMI, Yoko MIYAMA

2013 Volume 48 Issue 2 Pages 69-74
Published: June 20, 2013
Released on J-STAGE: December 20, 2013

DOIhttps://njjn-jsjc-gov-cn-s-1416.res.gxlib.org.cn:443/rwt/1416/https/MSYXTLUQPJUB/10.4035/jsfwr.48.69

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For the purposes of saving labor and adding hig- value to bunching onion production, a short leaf sheath cultivation system for the bunching onion (Allium fistulosum L.) cultivar ‘Shonan Ippon’ was evaluated in terms of working hours, growing period, and yield. It was found that the total working hours from planting until harvesting was 126.9 hours per 10a, which is 53% less than that for the conventional cultivation systems. With sowing between February 24 and May 23, the growing period was between 4.5 and 5.5 months, and it was possible to harvest continu-ously from early July. For each sowing time, a harvested yield of approximately 3000 kg/10a was obtained. In conclusion, the short leaf sheath cultivation system for the bunching onion cultivar ‘Shonan Ippon’ is considered to be an effective means of saving labor and adding hig-value to bunching onion production.

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