1. Package of Practices Recommendations,1986
2. Sulphur nutrition of rice. II. Effect of source and rate of sulphur on growth and yield under flooded conditions;Blair;Agron. J.,1979
3. Sulphur in relation to soil and crop situations in India;Ghosh;Fert. News,1980
4. Soil Chemical Analysis;Jackson,1958
5. Interaction effect of nitrogen and sulphur on growth and nutrient uptake by maize;Jaggi;J. Nucl. Agric. Biol.,1977