WHAT WE FIND IN SOILS 33 



4. General grain : 



About 20 per cent, of water. 

 From 40 to 60 per cent, of silt. 

 From 20 to 30 per cent, of fine sand. 

 From 15 to 20 per cent, of clay. 



5. Wheat: 



From 15 to 20 per cent, of water. 

 From 20 to 30 per cent, of clay. 

 From 30 to 70 per cent, of fine silt. 

 Not more than 15 per cent, of sand. 



6. Grass: 



From 20 to 25 per cent, of water. 



From 40 to 70 per cent, of clay. 



From 20 to 30 per cent, of silt and fine silt. 



Not more than 10 per cent, of sand. 



