- Anonymous. (1991). Annual report of all India Coordinated Spices Improvement Projp.ct. SKN College of Agriculture, Jobner.
- Dewey, D.R. and Lu, R.H. (1959). Agron. J. 51: 515-18.
- Hanson, C.H., et al. (1956). Agron ,J. 48 : 262-72.
- Johnson, H.W. et al. (1995). Agron J. 47: 314-18.
- Pant, KC. et al. (1983). Indian J. Agric. Sci. 54: 655-658.
- Sharma, KC. et al. (1991). Indian J. Genet. 50: 260-62.
- Wright, S. (1921). J. Agric. Res. 20: 557-87.