41 

 PRACTICE 19 



Soils 



Prac- 

 tice 18 

 Sand 



Sand 



— % 

 Peat 



Sand 



% 



Peat 



Sand 

 -% 

 Peat 



Sand 

 -% 

 Peat 



Weight of tube 



Weight of tube + air-dry 

 soil 



Weight of air-dry soil 



Percent of hygroscopic 

 moisture 



Weight of water-free soil.. 



Time to become moist 



Depth of dry soil 



Depth of wet soil 



Weight of water retained . 

 Percent of water retained. 

 Apparent specific gravity. 



Weight of cubic foot of soil . 



Pounds of water per cubic 

 foot 



Acre inches of water. 



Grams of water retained by 

 one gram of peat 



