TY  - BOOK
AU  - B.S. Dwivedi
AU  -  Arvind K. Shukla V.K. Singh  R.L. Yadav
TI  - Sulphur fertilization for sustaining productivity of rice- wheat system in western uttar pradesh
U1  - 631.825 
PY  - 2001///
CY  - Meerut
PB  - Project Directorate for Cropping for Systems Research
ER  -