DISKING AND CULTIVATING. 257 



where the subsoil is well stored with lime and the top 

 soil somewhat lime-hungry this machine will do in- 

 calculable good. It is probable that in almost any 

 soil meant to be devoted to alfalfa this machine will 

 very greatly increase the yield. It is easy to get a 

 stand in the clean earth thrown up from below. The 

 deep stirring, the aeration, the reservoir for moisture 

 all help make the land fit for alfalfa. To deepen sud- 

 denly the plow furrow to 16" might on many soils be 

 injurious to corn, but it could hardly be anything but 

 helpful to alfalfa and corn after the alfalfa would 

 reap the benefit. 



The three good purposes secured by use of this 

 machine are first, the loosening and aeration of the 

 soil, next the turning up of a fresh and unexhausted 

 supply of carbonate of lime (which would not be 

 found in all subsoils), and third, the making of a 

 clean seedbed of fresh earth from the subsoil and the 

 burying deep down of weed and grass seeds. 



