192 



SOILS 



end, the greater will be the soil reservoir for holding 

 water and soluble plant food. 



The tools of preparation : their work. The harrow fol- 

 lows the plow. You need this tool in connection with the 

 roller, to complete the pulverization of the soil, begun by 



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WHERE ROLLING DOES LITTLE GOOD 



The clods are too hard and so the work is not done effectively. Clay lands 

 must be worked at just the right time to get the desired results 



the plow. Both of these tools mellow the soil and push 

 the particles nearer to one another. You have observed 

 that the cloddy spots found in a fertile field make a poor 

 harvest. In these places the bad condition of the soil 

 excludes moisture and pens in plant food, hence this lack 

 of fruitfulness. 



The harrow and roller will correct this trouble. You 

 cannot be too painstaking, when it comes to harrowing. 



