Castro, Ruby Uy. <br/><br/>
Zinc deficiency in rice :  a review of resaerch at the International Rice Research Institute / 
Ruby Uy Castro. 
 - Manila :  International Rice Research Institute,  1977 
 - 18 p. 
 - IRRI research paper series ;  no. 9 .
<br/><br/> Cover title. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Zinc deficiency diseases in plants.<br/>Soils--Zinc content.<br/>Rice--Soils.<br/>Rice--Diseases and pests.