Studies on the Draft of Implements mounted on Small Tractors (I)

Measurements of Draft of Japanese Plow on the Field

Abstract

In order to study the draft of Japanese plows mounted on small tractors, the authors investigated the shapes of them and measured the horizontal component of the draft on the field.
The mean horizontal component is about 133kg and the specific resistance is about 0.5kg/cm², both of them being larger than horse drawn Japanese plows.
The increase in the draft of small tractor mounted plows is due to enlargement of the specific resistance and the width of furrow.
It seems that the main cause of increase in specific resistance of small tractor mounted plows is due to the increase of frictional resistance of plow heels.