1. Chinnery L E and Harding C P 1980 The effect of ferrous ion on the uptake of manganese by Juncus effusus. Ann. Bot. 46, 409?412.
2. Elamin O M and Wilcox G E 1986a Effect of magnesium and manganese nutrition on Muskmelon growth and manganese toxicity. J. Am. Soc. Hort. Sci. 111, 582?587.
3. Elamin O M and Wilcox G E 1986b Effect of magnesium and manganese nutrition on Watermelon growth and manganese toxicity. J. Am. Soc. Hort. Sci. 111, 588?593.
4. Foy C D, Chaney R L and White M C 1978 The physiology of metal toxicity in plants. Annu. Rev. Plant Physiol. 29, 511?566.
5. Goss M, Carvalho M J G P R, Cosimini V and Fearnhead M L 1991 An approach to the identification of potentially toxic concentrations of manganese in soils. In preparation.