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Figure 1 Nutrient concentrations in rice in Fe toxic soils. Data are for leaves or shoots during maximum tillering to flowering stages at inland valleys sites in Colombia (1 site, 1 genotype, 6 nutrient treatments; Howeler 1973), Côte d’Ivoire (2 sites, 3 genotypes, 2 nutrient treatments; Sahrawat et al., 1986, 2000), Indonesia (1 site, 1 genotype, 1 nutrient treatment; Jugsujinda. & Patrick, 1993), Madagascar (1 site, 5 genotypes, 3 nutrient treatments; the authors, unpublished) and Nigeria (3 sites, 4 genotypes, 2 nutrient treatments; Yamauchi, 1989). Boxes indicate 25^th, 50^th and 75^th percentiles; whiskers 10^th and 90^th percentiles; red crosses are typical deficiency limits and Fe and Mn toxicity limits (Dobermann & Farirhurst, 2000).