Statistics of crop responses to fertilizers. 

 - Rome :  Food and Agricultural Organization of the United Nations,  1966. 
 - viii, 112 p. :  ill. ;  23 cm. 
 - Freedom from Hunger, International Rice Year, 1966. .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fertilisers and manures--Research.<br/>Fertilizers, Crops responses of.
<br/><br/><label>Dewey Class. No.: </label>631.81