36 TILLING THE SOIL 



and thus it is retained in the ground. This layer of 

 pulverized soil is called a soil mulch. In other parts 

 of the country where the summers may be dry, a soil 

 mulch is formed by shallow cultivation to save the 



DEEP PLOWING 



water for the roots of the crops. Although there may 

 be no need of cultivation to kill the weeds, yet the 

 cultivated crops are often riven a shallow plowing 

 after each summer rain to^>rm the mulch and thus 

 check evaporation. 



