The soil :    how to conserve the soil. 

 - Rome :    Food and Agriculture Organisation of the United Nations,    1976. 
 - 29 p. :    ill. ;    21 cm. 
 - Better farming series ;    no. 6 .
<br/><br/><label>ISBN: </label>9251001448 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Soil  productivity<br/> Soil management.<br/> Soil conservation.<br/> Soils.