Assessment of soil nutrient balance :   approaches and methodologie s /  
R.N. Roy ...[et al] 
 - Rome :   FAO Publishing ,   2003 
 - x, 87p. :    ill., col., maps ;    30 cm. 
 - FAO Fertilizer and Plant Nutrition Bulletin ;   no. 14 .
<br/><br/>Includes bibliographical references (p.83-87) 
<br/><br/><label>ISBN: </label>9251050384 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soils --Nitrate content------<br/>Nutrient cycles--Nitrate content------