CORN OR MAIZE 



67 



harrow. If this is not done, moisture will evaporate from 

 the furrow slice, which will then become hard, making the 

 further preparation of the soil a difficult task. A roller 

 can sometimes be used to advantage in packing loose soil 

 or in crushing clods. For crushing clods, a small roller 

 is better than a large one, since a large roller will be more 



FIG. 19. A good type of roller for crushing clods. 



likely to push them down in the ground, while a small one 

 will crush them in the attempt to climb over them. A 

 roller made up of many small rods, or any form that will 

 give an uneven surface, is more efficient in crushing clods 

 than a smooth one. The roller should always be followed 

 with the harrow, since the former crushes the particles 

 of soil together and thus reestablishes capillarity, permit- 

 ting the escape of moisture. 



