Symposium on Nitrogen Assimilation and Crop Productivity, Hissar, Oct. 5-7, 1976. <br/><br/>
Nitrogen assimilation and productivity; proceedings   
Ed by S. P. Sen and others 
 - New Delhi  Associated Publishing House  1978 
 - xiii, 313p. 
<br/><br/>  
<br/><br/><label>Subjects--Index Terms: </label>
<br/><br/><label>Dewey Class. No.: </label>338.163184  / Sy989.NA