Fertilizer Uses and Crop Yields in the United States / 
The Fertilizer Work Group National Soil and Fertilizer Research Committee in cooperation with The Soil and Water Conservation Research Branch and ... 
 -- Washington :   United States Department of Agriculture,   1954 
 - IV, 75 p. -- 
 (Agriculture Handbook  ; 68).
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fertilizantes - Tierras de cultivo
<br/><br/><label>Universal Decimal Class. No.: </label>631.811(73)