TY  - BOOK
AU  - Troeh, F. R.,
TI  - Soils and Soil Fertility
SN  - 9788126517879
U1  - 631.422 
PY  - 2005///
CY  - Iowa
PB  - Blackwell Publishing
KW  - Soil Fertility
KW  - Techniques, equipment & materials
ER  -