Soil fertility and organic matter as critical components of production systems 

 - Madison :  The Society,  1987 
 - 166 p.  : gráfs. 
 - SSSA Special publication  ; 19 .
 - SSSA Special publication  ; 19 .
<br/><br/><label>LCCN: </label>857 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Humus--Congresos.<br/>Suelos--Fertilidad.<br/>Suelos--Materia orgánica.
<br/><br/><label>Dewey Class. No.: </label>631.422  / S6