368 



THE SMALL GRAINS 



rows should usually run east and west, or at right angles 

 to the wind. At the Nebraska station, in experiments of 

 4 years, drilled oats, cultivated after coming up, gave 

 better yields than broadcasted oats cultivated, but broad- 

 casted wheat not cultivated did better than drilled wheat 

 not cultivated. 



Drilling always requires less seed than broadcasting. 

 There are 4 kinds of drills, the disk, the shoe, the 



FIG. 115. Disk drill, with shovel attachments in front of disks. 



hoe, and the lister. The disk drill, which is probably 

 the most common, is of 2 forms, the single and double 

 disk (Fig. 115). 



397. Cultivating growing cereals. The few series of 

 experiments in cultivating grain have given results not 

 always in accord with each other. In seasons of more 

 than normal rainfall, the effect is sometimes injurious. 

 As the purpose is to conserve moisture, naturally cultiva- 

 tion should give better results in the drier seasons. Both 

 harrowing and rolling of winter grain in the spring have 



