58 



OPEN AIB GKA.PE CULTURE. 



loosened for the penetration and nourishment of Ibhe 

 roots, and allowing them to descend' deeper, they are 

 not BO liable to suffer from drought in summer; 

 strong soil is rendered capable of absorbing more 

 moisture, and yet remains drier at the surface by the 

 water passing down more rapidly to the subsoil, and 

 it insures a more thorough shifting of the soil." 



A method which we have sometimes adopted, and 

 which we think a saving of labor under some circum- 

 stances, is as follows : 



c 



b 



Pi& 



Let fig. 1. represent the plot of ground to be 

 trenched. Divide it into two equal parts by the line 

 a 5, and instead of wheeling the soil out of A F to the 

 rear of the plot, simply throw that from A out in front. 



