Factors Affecting Micronutrient Availability in Calcareous Soils of Southern Iran

摘要: The present research was conducted to determine iron, manganese, zinc, and copper availability in 59 calcareous soils of southern Iran; find relationships between micronutrient some major soil properties; predict the from physiographic position, development, climatic condition. Experiments were done by equilibration 10 g sample with 20 ml DTPA extractant for 2 h. Results indicated that DTPA-extractable Fe, Mn, Zn, Cu ranged 2.2–90.0, 0.6–15.4, 0.2–12.2, 0.6–5.4 mg kg−1, respectively. Generally, Zn deficiency more widespread, followed Fe deficiency, but Mn contents nearly all sufficient. Micronutrient significantly correlated properties including pH, organic matter (OM), clay, cation exchange capacity (CEC). Soil condition, moisture temperature regimes had significant effects on distribu...