Study on the Plowing Capacity of the 4-wheel Tractor (V)

Advantage and Disadvantage of the Continuous Plowing Methods

Abstract

The continuous plowing method has a good result on the plowing capacity but it has following faults.
The unplowed land appears on the four corners of the field, and moreover, they occupy fairly large area. The unplowed lands by throw-out plowing are smaller than those of throw-in, but the crescent-shaped unplowed lands that appear in every turning are irregular in shape, and is difficult to plow. Therefore, it requires a lot of time and hard labour to treat them. The decrease of the plowing widh, the cause of occuring of those un-plowed land, is in inverse proportion to the radius of turning. Their relations are as follows:
r≤5.5m b′=w
15m≥r≥5.5m b′i=k-90/r
r≥15m b′=b
Moreover, when we plow during turning, the inversion of furrow is bad, and particularly, the plowing depth becomes shallow because of side-pressure.
There are following ways to prevent the decrease of plowing width in turning. First, it is better to make the wheel-base short. Second, the width of the rear tyre should be the same of the bottom plow, so that the rear tyre may not move to the center part. Third, we improve the construction of the tractor body and we shall be able to get the turn-table type that has the hinge on the center frame of the tractor body, so that the locus of the rear wheel will coincide with that of the front wheel and the decrease of plowing width will be less.