TY  - GEN
AU  - Uphoff, Norman 
TI  - Biological approaches to sustainable soil systems
SN  - 1574445839
U1  - 631.4 
PY  - 2006///
CY  - Boca Raton
PB  - CRC Press
KW  - Soil biology
KW  - Soil ecology
KW  - Soil fertility
KW  - Soil management
ER  -