Physiological aspects of crop productivity  

 - Switzerland  International Potash Institute  1980 
 - 274p.  23cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Yields<br/>Specific techniques:apparatus, equipment, materials <br/>Cultivation and harvesting<br/>Harvesting
<br/><br/><label>Dewey Class. No.: </label>631.558  / PHY