Nitrogen efficiency in agricultural soil / 
Edited by D. S. Jenkinson and K. A. Smith. 
 - London :  Elsevier Applied Science,  1988. 
 - 450 p. :  ill. ;  25 cm. 
<br/><br/> Includes bibliographies. 
<br/><br/><label>ISBN: </label>1851662405 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Nitrogen fertilizers--Congresses.<br/> Soils--Nitrogen content--Congresses.<br/> Plants, Effects of nitrogen on--Congresses.<br/> Crops--Nutrition--Congresses