[1]Lu S h, et al. Features of manganese on paddy soil conditions of manganese deficiency on wheat. Southwest China Journal of Agricultural Sciences, 1990,3(2) :87 - 91. (in Chinese) [2]Liu X J, et al. Effect of water and fertilization on movement of manganese in soils and on its uptake by rice. Acta Pedologica Sinica. 1999, 36(3): 369- 375. (in Chinese) [3]Lu S H, et al. Effect of environmental condition on Mn deficiency of different wheat varieties. Chinese Journal of Applied Ecology, 1998,9(2) :159 - 162. (in Chinese) [4]Liu X J, et al. Effect of Mn application depth on Mn deficiency of different wheat genotypes. Chinese Journal of Applied Ecology, 1999, 10(2) . 179- 182. (in Chinese) [5]Graham R D. Breeding for nutritional characteristics in cereals.Adv. Plant Nutr. 1984,1:57- 102. [6]Fang Z, et al. Study on tolerance of different wheat cultivars or lines to manganese deficiency. Plant Nutrition and Fertilizer Science,1998, 4(3) :277 - 283. (in Chinese) [7]Bansal R L, et al. Tolerance of wheat ( Triticum L. ) and tritical (Xtriticosecale) to manganese deficiency. Indian J. Agr.Sci. 1994,64(6): 382- 386. [8]Graham R D. Genotypic difference in tolerance to manganese deficiency. Manganese in Soil and Plant. Klawer Academic Publishers, 1988:261 - 276. [9]Marcar N E. Genetic variation for manganese efficiency in cereals. Ph. D. Thesis, University of Adelaide, South Australia, 1986:201 - 205.