TY  - BOOK
AU  - Nambiar, K K M,
TI  - Soil Fertility and Crop Productivity Under Long Term Fertilizer Use in India
U1  - 631 
PY  - 2002///
CY  - New Delhi
PB  - ICAR (DIPA)
KW  - Crop Productivity
KW  - Soil Fertility
ER  -