1. Bhardwaj, K. K. R., Growth and symbiotic effectiveness of indigenousRhizobium species of a saline-alkali soil. Proc. Indian Nat. Sci. Acad. (under publication).
2. Bernstein, L. and Ogata, G., Effect of salinity on nodulation, nitrogen fixation and growth of soyabeans and alfalfa. Agron. J.58, 201–203 (1966).
3. Bhumbla, D. R. and Abrol, I. P., Use gypsum for getting good yield from sodic soils. Indian Farm.21, 11–12 (1971).
4. Ethiraj, S., Sharma, H. R. and Vyas, S.R., Studies on salt tolerance of rhizobia. Indian J. Microbiol.12, 87–92 (1972).
5. Lie, T. A., Symbiotic nitrogen fixation under stress conditions. Plant and Soil (Special volume), 117–127 (1971).