318 



DRY-FARMING 



years agi), which fiives the farmer full control over 

 the process of seeding, is the only system to be used. 

 The numerous seed drills on the market all employ 

 the same principles. Their variations are few and 

 simple. In all seed drills the seed is forced into tubes 

 so placed as to enable the seed to fall into the fur- 

 rows in the ground. The drills themselves are distin- 



FiG. b4. Disk drill and seeder. 



guished almost wh(jlly b}' the type of the furrow 

 opener and the co^-ering devices which are used. The 

 seed furrow is opened either by a small hoe or a 

 so-called shoe or disk. At the present time it appears 

 that the single disk is the coming method of opening 

 the seed furrow and that the other methods will 

 graduall}' disappear. As the seed is dropj^ed into 

 the furrow thus made it is c(jvered by some device at 

 the rear of the machine. One of the oldest methods 

 as well as one of tlie most satisfactorv is a, series of 



