Loomis,R. S. <br/><br/>
Crop ecology :  productivity and management in agricultural systems/ 
R.S. Loomis, D.J. Connor. 
 - Cambridge :  Cambridge University Press,  c1992. 
 - xiv, 538 p. :  ill. ;  25 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>052138379X (hardback) 0521387760 (paperback) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural systems.<br/>Agricultural ecology.
<br/><br/><label>LC Class. No.: </label>S589.7  / L66 1992