TY  - BOOK
AU  - Troeh,Fredrick R
TI  - Soil and soil fertility 
SN  - 9788126517879
U1  - 631.4 
PY  - 2005///
CY  - New Delhi
PB  - Wiley
KW  - Soils
KW  - Research
KW  - Soil fertility
KW  - Management
ER  -