The soil :   how the sol is made up. 

 - Rome :   FAO,   1976. 
 - 37 p.:    ill. ;    21 cm. 
 - Better farming series ;   no. 4. .
<br/><br/><label>ISBN: </label>925100143 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soils.--------<br/>Soil structure.--------