TY  - BOOK
AU  - K.N. Tiwari
AU  -  Suresh C. Modgal, 
TI  - Review and refinement of fetilizers recommandation for principal crops in uttar pradesh
U1  - 631.8 
PY  - 2000///
CY  - Gurgaon
PB  - Potash and Posphate Institute of Canada, India prog
ER  -