- Kar, AX (1998). Fertil News. 43(5): 53-57.
- Kumar, A and Tripathi, R.P. (1990). Crop Res. 3 (1): 7-13.
- Kumar, A and Yadav, 0.5. (1995). IndianJ. Agric. Sci. 65(10): 703-707.
- Singh, L. et al. (1997). Nesws Letter-National Hort. Res. Dev. -Foundation, 17: 1-3.
- Subbiah, K. etal. (1983). South Indian Hort. 31: 287-290.