Chemical aspects of ecology in relation to agriculture /    
Hubert M artin 
 - Ottawa :   Queen`s Printer,   1957 
 - 96 p.:    tables,diagrs. ;    26 cm. 
 - Science Service Laboratory ,University Sub Post Office, London,Ontar io.    1   Research Monograph    .
<br/><br/>  Publication no.1015 of the Department 
<br/><br/>Includes bibliography at chapter ends 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plant ecology--------<br/>Agricultural chemistry--------
<br/><br/><label>Dewey Class. No.: </label>581.5 CAN