Crop ecology :  productivity and management in agricultural systems / 
David J. Connor. 
 - Second edition. 
 - New Delhi, India :  Cambridge University Press,  2013. 
 - 556 pages :  illustrations ;  24 cm. 
<br/><br/> Includes bibliographical references and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural ecology.<br/>Agricultural systems.