~16 — 

 Rolling. 



Q. How is the rolling done ? 



A. The rolling is done by running on the land, 

 after it has been harrowed, rollers made of wood, 

 of stone or of iron ; these rollers are drawn by 

 horses. 



Q. What are the effects of rolling on strong soils, 

 A. The effects of rolling on strong soils are to break 

 up the sods, to pulverize them and consequently to 

 loosen the earth. On these lands, toothed rollers 

 are often used (Groskill rollers) which break up the 

 clods easily and prevent the soil from getting crusty. 

 Q. What are the effects of rolling on light soils? 



A. On light soils the action of the roller is to* 

 settle the earth, and to give it more consistence and 

 strength. By this process the dampness of tiie soil 

 is better preserved, the atmosphere and heat do not 

 penetrate it so readily and the root? are less exposed 

 to be laid bare. The heavier the roller, the more 

 profitable the work will be. 



Q. What is the best time to roll strong soils ? 



A. The rolling in strong soils should take place 

 when the earth is neither too damp nor too much 

 hardened by the drought. When the earth is too 

 damp, the clods, instead of being pulverized by the 

 action of the roller, are merely flattened ; besides, 

 the weight of the roller forms a crust which hardens 



