International rice research institute <br/><br/>
Symposium on potential productivity of field crops under different environments 

 - Biological basis physical  environment, And crop productivity 
 - los banos,laguna,Philippines.  International rice research institute  1983 
 -  p526;ill 
<br/><br/><label>ISBN: </label>9711041146 
<br/><br/><label>Universal Decimal Class. No.: </label>633  / DOA