1. Bhumbla D R and Abrol I P 1978 In Soils and Rice. IRRI, Los Baños, Philippines. pp 719?734.
2. John C D et al. 1977 J. Exp. Bot. 28, 133?141.
3. Kramer D et al. 1977 Ann. Bot. 41, 1031?1040.
4. Krishnamurthy R et al. 1987 Oryza 24, 66?69.
5. Kuiper P J C 1984 In Salinity Tolerance in Plants. Eds. R C Staples and G H Toenniessen. pp 77?91. Wiley-Interscience, New York.