TY  - BOOK
AU  - A. Balasubramaniam
AU  -  C.R. Chinnamuthu M. Balusamy P. Subbian  K.K. Chandragiri
TI  - Soil fertility management in cropping systems
U1  - 631.422 
PY  - 1999///
CY  - Coimbatore
PB  - Department of Agronomy, Tamil Nadu Agricultural University
ER  -