Ismail, Safwat Ahmed. <br/><br/>
Studies on the availability deficiency of zinc in soils of Egypt   [microform] / 
Safwat Ahmed Ismail. 
 -  1990. 
 - 89, 4 leaves :  ill. ;  30 cm. 
<br/><br/>Thesis (Ph.D.) -- El-Mini University, 1990. 
<br/><br/>Includes bibliographical references (leaves 76-89) 
<br/><br/><br/>Microfiche. <br/>Cairo, Egypt : <br/>ASUNET, <br/>2 microfiche : negative. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soils--Zinc content.<br/>Sandy soils.<br/>Calcareous soils.<br/>Soils--Research.