Nelson, L. B. <br/><br/>
Changing patterns in fertilizer use 

 - Madison, Wis. :  Soil Science Society of America,  1968 
 - 466 p.  : ilus. ; mapas ; gráfs. 
<br/><br/><label>LCCN: </label>31786 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fertilizantes.
<br/><br/><label>Dewey Class. No.: </label>631.8  / N4