1. Chopra, S.L. and Kanwar, J.S. (1976). Analytical Agriculture Chemistry. Kalyani Publishers, Ludhiana and New Delhi.
2. Jackson, M.L. (1958). Soil Chemical Analysis. Prentice Hall, N.J., U.S.A.
3. Kramer, P.J. (1959). Plant and Soil Water Relationship. Tata Mc Graw Hill Publishing Corp., New Delhi.
4. Lal, A.B. (1956). Mortality of Sal due to draught in Deogarh Division of Orissa. IX Silv. Conf. Proc. II: 48-50.
5. Pande, D.C. (1956). Mortality of Sal forests of U.P. with special reference to recent mortality in Bahraich Division. IX Silv. Conf. Proc. II: 50-59.
6. Piper, C.S. (1950). Soil and Plant Analysis. University of Adelaide, Adelaide.
7. Prasad, B.N. (1961). Abnormal mass scale mortality of Sal in the district of Palamau (Bihar). Xth Silv. Conf. Proc. II: 727-734.
8. Prasad, R. and Jamaluddin (1985). Preliminary observation of Sal mortality in Madhya Pradesh. Indian For., 111: 250-271.
9. Puri, G.S. and Gupta, A.C. (1954). Seasonal variation in foliar composition of some Indian forest trees. J. Ind. Bot. Soc., 33: 382-393.
10. Ramam, S.S. (1982). Trends in nutrient concentration, storage and uptake by forest trees. Indian J. For., 7: 93-102.
11. Seth, S.K., Waheed Khan, M.A. and Yadav, J.S.P. (1960). Sal mortality in Bihar. Ind. For., 86: 645-679.
12. Singh, A.K. and Singh, B. (1987). Soil properties as a function of depth in a deep weathering profile on Gneiss under natural Sal (Shorea robusta) forests of South Raipur (M.P.) 1. Physico chemical properties. J. Trop. For., 3: 336-343.
13. Singh, A.K., Prasad, A., Khatri, P.K. and Singh, B. (1987). Physico-chemical properties of soil developed over Gneissic rocks under different forest covers in Nagri Range of South Raipur (M.P.). J. Trop. For., 3: 37-47.
14. Singh, K.P. (1969). Nutrient concentration in leaf litter of ten important tree species of deciduous forests at Varanasi. Trop. Ecol., 10: 83-95.
15. Soil Survey Staff (1978). Soil Taxonomy. U.S.D.A. Hand Book No. 436 (I.C.A.R. Publication, New Delhi).
16. Totey, N.G., Singh, A.K., Sonkar, S.D., Bhowmik, A.K. and Khatri, P.K. (1984). Contribution of soil moisture stress towards sal mortality with particular reference to girth classes. XVII R.A.G. meeting of S.F.R.I. Jabalpur (M.P.).
17. Totey, N.G., Bhowmik, A.K., Khatri, P.K., Singh, A.K., Sonkar, S.D., Kulkarni, R. and Prasad, A. (1988). Impact of forest covers on soil of Risgaon Range, Raipur (M.P.). Indian J. For., 11: 63-69.