Ibach, D. B.  1900- <br/><br/>
Crop yield response to fertilizer in the United States 
[by D. B. Ibach and J. R. Adams. 
 - Washington]  U.S. Dept. of Agriculture, Economic Research Service; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.,  1968] 
 - 295 p.  map.  29 cm. 
 - [United States. Dept. of Agriculture] Statistical bulletin  no. 431 .
 - Statistical bulletin (United States. Department of Agriculture) ;  no. 431. .
<br/><br/> Cover title.  Supersedes U.S. Agricultural Research Service. Farm Economics Research Division. Fertilizer used on crops and pasture in the United States; 1954 estimates, issued as U.S. Dept. of Agriculture, Statistical bulletin, no. 216. 
<br/><br/>Bibliography: p. 11. 
<br/><br/><label>LCCN: </label>agr68000235  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fertilizers--Statistics.--United States<br/>Crop yields--Statistics.--United States
<br/><br/><label>LC Class. No.: </label>HD1751  / .A5 no. 431 
<br/><br/><label>National Agricultural Library Call No.: </label>1Ag84St no. 431