TY  - BOOK
AU  - Balasubramanian,A.
TI  - Soil fertility management in cropping systems
U1  - 631.42 B19S 
PY  - 1999///
CY  - Coimbatore
PB  - Tamil Nadu Agricultural Univ. Dept. of Agronomy
KW  - SOIL FERTILTY
ER  -