Y.P. Abrol <br/><br/>
Nitrogen : Soils, physiology, biochemistry, microbiology, genetics 

 - Newdelhi  Indian National socio acadamy  1993 
 - 285p 
<br/><br/><br/>ENGLISH 
<br/><br/><label>Dewey Class. No.: </label>631.84  / INSA