Abstract
As explained in the previous report, the utilization of one way plows can be deviled into two types, that is, two kinds of treating inner-side of the field and five kinds of treating head land. The efficiency value can be calculated by dividing the distance of plowing by the total distance of running including the futile run, but to get more correct value the time of gear change and decrease of the dis tance of reversing must be rearranged to the distance of the futile run.
In this way, values of E are shown by each plowing method in Fig. 1-6. In the calculation we used 3 kinds of tractor A, B and C, and the slendenees rate of the field is 1/1-4/1, and the are a is 202-1002m2 If we use the followed plowing methed in the inner-side, the value of E rises rapidly by in crease of area, but when we use the normal plowing method it is not effective. Also in either case, increase of the slenderness-ratio have a great influence on the rising tendency of E value. As a counter-measure, the short side is to be divided to decrease the distance of the futile run on the short side B. When we divide the square field, the side length of which is 20, 40, 60, 80, and 100m, into 1, 2, 3, 4, 5 blocks, we get the value of B as shown in Fig. 7 In this figure, we recognize the value of E increase more rapidly than former values. Comparison on the efficiency curves of each plowing method are shown Fig. 8
In short, for decreasing the loss of dis tance and increasing the valve of E, we may use the followed plowing method, But as the other way, if we split the inner-side into short width form, the distance of the fntile run in the inner-side will be decreased. Moreover if we use the above method together with the semi-followed plowing method in the cicumference, the valne of E will rise considerably and it may be more profitable than the other methods.
