Supplemental irrigation 

 - Dept. of Agriculture  U.S. 
 - 72p.  fig., table 
<br/><br/><label>Nat. Bib. No.: </label>736 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Engineering
<br/><br/><label>Universal Decimal Class. No.: </label>626.80  / SUP