Chela, Kartar Singh <br/><br/>
Crop rotations  

 - Ludhiana:   Punjab Agricultural University,   1975 
 - 47p.  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture 
<br/><br/><label>Subjects--Index Terms: </label>Intercropping  Farming 
<br/><br/><label>Universal Decimal Class. No.: </label>63  / L5