1. Allam, A. I. and Hollis, J. P., Sulphide inhibition of oxidases in rice roots. Phytopathology 62, 634–639 (1972).
2. Allam, A. I., Pitts, G. and Hollis, J. P., Sulphide determination in submerged soils with an ion-selective electrode. Soil Sci. 114, 456–467 (1972).
3. 3 American Public Health Association, Standard methods for the examination of water and waste water, 13th ed. N. Y. 874 pp. (1971).
4. Aomine, S., A review of research on redox-potentials of paddy soils in Japan. Soil Sci. 94, 6–13 (1962).
5. Baba, I., Inada, K. and Tajima, K., Mineral nutrition and occurrence of physiological diseases. In The Mineral Nutrition of the Rice Plants. The John Hopkins Press, Baltimore, Maryland, U.S.A., pp. 173–195 (1964).