TY  - BOOK
AU  - 
AU  - Mukhopadhay, S S
TI  - Balanced fertilization for sustaining crop productivity :proceedings of the Interntional symposium held at punjab Agricultural University,Ludhiana,India,22-25 November2006
U1  - 631.83 
PY  - 2006///
CY  - Horgen
PB  - International Potash Institute
ER  -