1961 年 23 巻 1 号 p. 13-16
In several conditions, area and form, of a paddy field, we researched the efficiency of plowing by the wheel tractor, and the ratio of the plowed area to the total area of paddy field and found that the wheel tractor was used most effectively in a field of 20m (width) 100m (length) section. In this field, the plowing efficiency was about 6-7hr per 1ha, and the ratio of the plowed area to the total area was 93-98%
This report shoull be submitted for the purpose of that the wheel tractor in most effectively used in a paddy field.