Residual effects of fall- and spring-applied nitrogen fertilizers on crop yields in the Southeastern United States. 

 - Washington :  Government Printing Office ,  1961 
 - 19p. :  ill. ;  20 cm.  
 - USDA Technical bulletin .
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture--United States<br/>Nitrogen fertilizers<br/>Fertilizers
<br/><br/><label>Dewey Class. No.: </label>631.8  / US