410 



THE SMALL GRAINS 



particles and at a regular depth for promoting uniform 

 germination; Probably no one kind of drill is best for 

 all conditions, but often the press wheels are desirable for 

 firming the soil around the seed (Fig. 134). If the soil 

 is very loose at seeding time, rolling with a corrugated 

 roller (see Fig. 128) may be advisable. If only a smooth 

 roller is available, it should be used before drilling, or if 

 after drilling, some light cultivation, to leave the surface 

 rough, should follow it. 



In one case of 2 experiments with methods of seeding winter 

 wheat in Utah, continued 5 years, broadcasting gave an average 

 yield of 12.9 bushels an acre, and drilling 19.9 bushels ; in the other 

 case, 15.6 bushels were secured from broadcasting, and 29.2 bushels 

 from drilling. A less yield was secured from cross-drilling than from 

 ordinary drilling (Merrill, 1910, pp. 139-140). At the Nephi, 

 Utah, substation, a small increase in yield in favor of cross-drilling 

 was secured.- 



In experiments in Wyoming at 5 substations 4000 to 7200 feet 

 in elevation, barley gave the largest yields sown in drills 8 inches 

 apart and 1 inch apart in the row. 



At the California State Farm, experiments (22 trials) on methods 

 of seeding wheat and barley resulted as follows : 



TABLE XIV. RESULTS FROM DRILLED AND BROADCASTED 

 SEEDING OF WHEAT AND BARLEY AT THE CALIFORNIA 

 STATE FARM 



