Field crop ecosystems / 
edited by C.J. Pearson. 
 - Amsterdam ;  New York :  Elsevier,  1992. 
 - xiii, 576 p. :  ill. (some col.), maps. 
 - Ecosystems of the world ;  18 .
<br/><br/><label>ISBN: </label>0444886753 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Field crops.<br/>Field crops--Ecology.<br/>Cropping systems.