- Castro, P.R.C. and Moreas, R.S. (1980). Luiz de Queiroz., 37: 795-803.
- Chandrababu, R. et al. (1995). Madras Agric. J., 82: 229-230.
- Deotale, R.D. et al. (1995). J. Soil Crops, 5: 172-176.
- Goswami, B.K. and Srivastava, G.C. (1987). Indian J. PI. Physiol., 30(4): 337-343.
- Grossman, K. (1990). Physiol. PI., 78: 642-648.
- Gu-WeiHong and Gu, W.H. (1998). Acta-Agriculturae-Shanghai, 2: 45-50.
- Koti, R.V. (1997). Ph.D. Thesis. Univ. Agric. Science, Dharwad, India.
- Kulkarni, S.S. (1993). M.Sc. Thesis. Univ. Agric. Science, Dharwad, India.
- Mayers et al. (1991). Aust. J. Agric. Res., 42: 517-530.
- Morandi et al. (1983). Phyton Argentina., 43: 35-44.
- Pando, S.B. and Srivastava, G.C. (1985). Indian J. PI. Physiol., 28(1): 72-80.
- Panse, V.G. and Sukhatme, P.V. (1967). Statistical Methods for Agricultural Workers. ICAR, New Delhi, pp. 167-174.
- Rafique-uddin, M. (1984). Legume Res., 7: 43-47.
- Ravichandran, V.K. et al. (1992). Haryana J. Agron., 8: 166-168.
- Ravichandran, V.K. and Ramaswami, C. (1991). Indian J. Pl. Physiol., 34: 80-83.
- Reena Tagade et al. (1998). J. Soils Crops, 8: 172-175.
- Sharma, K. and Walia, N. (1996). Environ. Ecol., 14: 307-310.
- Sheetvanter, M.N. and Patil, S.V. (1988). J. Farm. Systems, 4: 10-13.