Nitrogen in agricultural soils / 
edited by Frank J. Stevenson. 
 - Madison, Wisconsin :  American Society of Agronomy,  1982. 
 - xx, 940 p. :  ill. ;  26 cm. 
 - Agronomy ;  no. 22 .
<br/><br/>Includes bibliographical references and index. 
<br/><br/> Open Access. 
<br/><br/><label>ISBN: </label>0891180702 
<br/><br/><label>LCCN: </label>821704  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soils--Nitrogen content.<br/>Plants, Effects of nitrogen on.<br/>Crops and soils.<br/>Nitrogen fertilizers.