Simpson, Ken,  1921- <br/><br/>
Fertilizers and manures / 
Ken Simpson. 
 - London ;  New York :  Longman,  1986. 
 - 254 p. :  ill. ;  22 cm. 
 - Longman handbooks in agriculture .
<br/><br/> Includes indexes. 
<br/><br/>Bibliography: p. 243. 
<br/><br/><label>ISBN: </label>058244747X (pbk.) : 
<br/><br/><label>LCCN: </label>85015950  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fertilizers.<br/>Manures.
<br/><br/><label>LC Class. No.: </label>S633  / .S624 1986 
<br/><br/><label>Dewey Class. No.: </label>631.81  / SIF 1986