Abstract
It is essential to make straight and parallel rice-planting rows to expect a satisfactory subsequent operation such as hoeing and harvesting with rice-binder. But the straight running of the machine in the submerged field is very difficult.
Since it is one of the problem how to express the situation of the planting row, the following six specific characters obtained with the statical method are introduced in the present paper.
They are related to the straightness of row, the variation of row to straight, the parallelness of row, the directioness of row, the mean distance of row and the mean space of plant.
The situation of the planting row was strictly shown by these characters, and it can be supposed that the factors which influenced on these six characters are the steering technique, the field conditions, and the running or supporting device of transplanters.
According to the analysis of variance, the straightness of the planting row was much influenced by the factors of steering technique.
