Barrera, Josephine C. <br/><br/>
Yield performance of IR-50 as affected by frequency of Azolla biomass incorporation / 
Josephine C. Barrera. 
 - Indang, Cavite,  1983. 
 - 22p. : ill. ; 28 cm. 
<br/><br/> Special Problem (BS Agriculture Major in Agronomy) Don Severino Agricultural College. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rice.<br/>Fertilizers and manures.<br/>Azolla.<br/>Soils--Fertility and management.
<br/><br/><label>Dewey Class. No.: </label>633.18   / B27 1983