Tillage on Sloping Pastures

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  • Ibuki Toshihiko
    National Agriculture and Food Research Organization  Institute of Livestock and Grassland Science
  • Amaha Koichi
    National Agriculture and Food Research Organization  Institute of Livestock and Grassland Science
  • Shibuya Takeshi
    National Agriculture and Food Research Organization  Institute of Livestock and Grassland Science
  • Kida Tamaki
    National Agriculture and Food Research Organization  Institute of Livestock and Grassland Science
  • Sumida Noritoshi
    National Agriculture and Food Research Organization  Institute of Livestock and Grassland Science
  • Inoue Hidehiko
    National Agriculture and Food Research Organization  Institute of Livestock and Grassland Science
  • Abe Yoshiyuki
    Ministry of Agriculture, Forestry and Fisheries Agriculture, Forestry and Fisheries Reseach Council's Secretariat
  • Kojima Yoichiro
    National Agriculture and Food Research Organization  Institute of Livestock and Grassland Science
  • Nakao Seiji
    National Agriculture and Food Research Organization  Institute of Livestock and Grassland Science
  • Ikeda Toshiro
    Matsuyama Plow Mfg Co.,Ltd
  • Kuroda Masahito
    Matsuyama Plow Mfg Co.,Ltd
  • Togamura Yasuko
    National Agriculture and Food Research Organization  Institute of Livestock and Grassland Science

Bibliographic Information

Other Title
  • 傾斜草地の耕うん作業
  • ケイシャ クサチ ノ コウウンサギョウ

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Abstract

Pasture renovation is known to be able to limit radioactive cesium absorption by grass. However, on sloping pastures, the machine tilling that is necessary for pasture renovation is often difficult. To address this problem, we selected a radio-controlled power tractor with a 49.3 kW engine that achieves high traction on sloping areas due to a crawler-type running device, and we developed an experimental rotary tiller of 1.6 m in working width that can be attached to the tractor. To determine this tractor-tiller combination’s tillage performance on sloping pasture, we conducted the tilling in three directions: along the contour line, up the slope, and down the slope on 15° and 25° sloping pastures. We measured the crawler slippage, the number of engine revolutions, and the soil pulverization. The results revealed that under tilling conditions at the working speed of approximately 0.45 m/s and a tilling depth of 6–9 cm, regardless of the traveling direction, the engine output power was sufficient, and no tractor instability due to crawler slippage was observed. Our findings thus indicate that the experimental rotary tiller attached to the crawler tractor provided high pulverization and that this combination can be expected to successfully perform pasture renovation for the remediation of grass.

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