272 



SEEDING AND PLANTING 



In all of these boards the form and size of the drill is determined 

 by the shape of the batten. When the construction of the batten 

 is triangular, the seed necessarily lies in a single narrow line. 

 When wider drills are desired, the batten should be rectangular. 

 When concave on the lower face, the seed is thrown into two lines 

 at the outer margins of the drill. 



10. Drill Rollers. A number of roller implements have been 

 constructed for forming the drills. They are very effective, permit 

 of rapid work, and are recommended when a large amount of seed- 

 ing is done in drills. The form devised by Sauer 1 permits of very 



FIG. 55. The Sauer type of drill roller. 



rapid work. It places the seed at the best depth and the drills 

 at a uniform distance apart. In order to use this implement, 

 however, the beds should be perfectly flat, the surface soil finely 

 pulverized and neither too moist nor too dry. It consists of a 

 hardwood roller of the same length as the width of the bed, on the 



FIG. 56. The Spitzenberg drill former, 

 a, b, c, d, e. Detachable rollers. 



circumference of which are nailed a number of battens spaced at 

 the desired drill distance. The form of the battens determines 

 the form of the drills (Fig. 55). 



1 Sauer, Karl: Saeapparat fur Nadelholz-Saatbeete. 

 blatt, S. 449-452. 1904.) 



(Forstw. Central- 



