SOIL IMPROVEMENT 



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are made by digging ditches as deep as needed, putting in a layer 

 of loose stones or brush, and then filling them with earth. 



LAND TERRACED TO PREVENT SOIL WASHING 



Hillside Ditches and Terraces. 

 Sandy, rolling land which does 

 not suffer from standing water 

 often needs to be protected 

 against washing rains. It should 

 be terraced so as to break long, 

 downward slopes, or ditched with 

 broad, shallow ditches which 

 lead gradually to the lower 

 ground. 



Hillside land should be 

 plowed deep, and cultivating 

 tools should run as near on a 

 level as possible. It is often n 

 good plan to put thin hillsides 

 down in grass or to leave them 



Soil washing caused by harrowing up and 

 down a hill, instead of around it 



