Elshahat, Ramadan Awad Eldissoky. <br/><br/>
Studies on the use efficiency of potassium and organic fertilizers on potatoes and its role in improving soil properties  [computer file]/ 
 دراسات على كفاءة استخدام الأسمدة البوتاسية و العضوية على البطاطس ودورها فى تحسين خواص التربة. 
Ramadan Awad Eldissoky Elshahat. 
 -  2008. 
 - Computer laser optical disks;  4 3/4 in. 
<br/><br/>Thesis (Ph.D.) --Mansoura University, 2008. 
<br/><br/>Includes bibliographical references (leaves 205-218). 
<br/><br/><br/>Systems requirments:Adobe Reader. 
<br/><br/><br/>Summary in Arabic. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Potatoes--Fertilizers.<br/>Potassium fertilizers.<br/>Organic fertilizers.