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Table 12 DTPA-extractable Fe, Zn, Cu, and Mn for deficient, marginal, and sufficient soils

From: Characterizing soils and the enduring nature of land uses around the Lake Chamo Basin in South-West Ethiopia

Category Fe Zn Mn Cu
mg/kg soil
Low (deficient) 0–2.5 0–0.5 < 1 0–0.4
Marginal 2.6–4.5 0.6–1 0.4–0.6
High (sufficient) > 4.5 > 1 > 1 > 0.6
Toxic level     
  1. Source: Harrera, (2005); Havlin et al. (1999)