Havlin, John L.  <br/><br/>
Soil fertility and fertilizers :  an introduction to nutrient management / 
John L. Havlin & [et.. al.]. 
 - 6th ed. 
 - Upper Saddle River, N.J. :  Prentice Hall,  1999. 
 - x, 499 p. :  ill. ;  26 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0136268064 
<br/><br/><label>LCCN: </label>98038911  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fertilizers.<br/>Soil fertility.<br/>Crops
<br/><br/><label>Dewey Class. No.: </label>631.42  / HAS