SOIL QUALITY IN SEMIARID AGRICULTURE 
JOHN W . B . STEWART 
 - CANADA  SASKATCHEWAN INSTITUTE OF PEDOLOGY  1990 
 - xv, 292p.:ill.;  Hbk 
<br/><br/><label>ISBN: </label>0888802382 
<br/><br/><label>LC Class. No.: </label>S623 .S7 1990