TY  - BOOK
AU  - Schjonnings, P.  .
TI  - Managing soil quality challenges in modern agriculture / 
SN  - 0-85199-671-X
U1  - J:1 
PY  - 2004///
CY  - Cambridge : 
PB  - CABI Publishing , 
KW  - Soils-quality
ER  -