By the term baulatura is meant the agricultural technique with which a convexity is assumed by a ground, raising the center and degrading towards the sides. The baulatura aims to facilitate the outflow of water in conditions that, otherwise, could cause stagnation conditions.
In this case the plant is placed in the part of the ridge so that the slightest slope helps the dripping of excess rain or irrigation water.
The trunk is therefore a profile that can be taken on the ground with slopes of the order of 1-2 per thousand. In the agronomic technique it is a necessary complement to all the surface arrangements which provide for the regulation of excess water, without the use of drainage, of the lands lying horizontally.
With the baulatura the excess water is conveyed to the special drains made.
In the geometry of a truss, the ridge line joins the points of maximum altitude of the plot, while the trimming arrow is the slope of the imaginary line that extends from the ridge line to the edge of a scolina. In most of the surface arrangements adopted in the agricultural tradition in Italy, the ridge line coincides with the centerline that cuts the plot longitudinally and symmetrically, therefore the trunk has a convex transverse profile.
Variants of the trunk are other tupi of arrangement such as the cavino one, which was adopted in the past in the Veneto countryside, in which a trunk was created with a transverse ridge line and a strong arrow of the trunk in the longitudinal direction, with differences in the order of one meter.
Another type of variant of the trunk was that of the trestle arrangement, in use in some areas of Emilia, which provided for a main trunk with a cross-shaped arrow and a secondary one, of modest entity, with a longitudinal-shaped arrow near the heads.
To operate the field of a field it is necessary to work with repeated plowing to fill.
When finally the desired slopes are reached, the trunk is preserved by alternating the plowing to fill with the plowing in alternating years.
Today the bedding can be obtained, especially in horticulture with special machines called bedding machines.