El-Sissy,Laila Mohamed Hassan. <br/><br/>
Microbial transformation of nitrogen in soil under different drainage system  [microform]/ 
 التحولات الميكروبية لعنصر النيتروجين فى الأراضى تحت نظم الصرف المختلفة. 
Laila Mohamed Hassan El-Sissy. 
 -  1987. 
 - 130, 6 leaves :  ill. ;  30 cm. 
<br/><br/>Thesis (Ph.D.) -- Cairo University, 1978. 
<br/><br/>Includes bibliographical reference (leaves 114-130) 
<br/><br/><br/>Microfiche. <br/>Cairo, Egypt : <br/>ASUNET, <br/>3 microfiche : negative. 
<br/><br/><br/>Summary in Arabic. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil microbiology.<br/>Soils--Nitrogen content.<br/>Soils--Analysis.<br/>Drainage.