Control of crop productivity / 
edited by C.J. Pearson 
 - Sydney :  Academic Press ,  1984 
 - 315 p. :  ill. ;  24cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>0125482809 
<br/><br/><label>LCCN: </label>83-71463 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Crop yields--Addresses, essays, lectures<br/>Agricultural productivity--Addresses, essays, lectures