it does not break up the subsoil or hard-pan to any great extent. In 

 this gash water and air are freely admitted. They naturally spread out 

 when the bottom of the gash is reached and obeying nature's laws, they 

 reach the surface by capillary attraction. To illustrate, if a wooden 

 floor is laid upon another floor which is tight and water is 

 poured into a crack in the top layer, it naturally spreads out 

 and in time comes to the surface by the process of capillary attrac- 

 tion, causing a rotting of the boards. Likewise, water which enters 

 this gash in the soil followed by air, works on the same principle, 

 coming to the surface, as it must, it causes a mellowing or rotting of 

 the compact soils. 



Two important things can be secured by using this type of plow, 

 namely: 



1. Water is stored to be utilized by the plant, and the dense soil is 

 mellowed, permitting the penetration of roots. 



2. After this plow has been used and the water and air have done 

 their work, the deep plow will then not only penetrate but will usually 

 scour. Where this plow has been used, especially in dry sections, the 

 results have been remarkable. The implement c^n be attached to a 

 gang plow, penetrating every alternate furrow, or it can be easily drawn 

 by two horses running to a depth of from ten to eighteen inches. 



Storer gives the following: 



"Mr. Wilson, near Edinburgh, operating on land that had been tile- 

 drained, plowed a field eight inches deep and subsoiled a part of it to a 

 depth of eighteen inches. The differences in the crops grown the first 

 year after these operations are given in the table: 



Mr. MacLean, in the same vicinity, made a similar experiment with 

 the following result: 



