Assessment of soil nutrient balance :  approaches and methodologies / 
R. N. Roy..et al. 
 - Rome :  FAO,  2003. 
 - x, 87p :  col. ill, maps ;  30 cm. 
 - FAO fertilizer and plant nutrition bulletin ;  no. 14 .
<br/><br/>Includes bibliographical references (p.83-87) 
<br/><br/> Open access. 
<br/><br/><label>ISBN: </label>9251050384 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil fertility.<br/>Crops--Nutrition.<br/>Crops and soils.