Distribution of soil medium- and micro-elements in Fujian tobacco-growing soils

Calculated arithmetic means of medium-element and micro-element contents of tobacco-growing soils in Fujian are as follows:exchangeable Ca 519.33mg/kg,exchangeable Mg 34.49mg/kg,available S 27.91mg/kg,available Fe 61.07mg/kg, available Mn 13.99mg/kg,available Cu 3.09mg/kg,available Zn 3.32mg/kg,available B 0.17 mg/ kg and water soluble Cl 26.30mg/kg.Exchangeable Mg and available B contents of the soil are evidently deficient while available Fe and Mn are abundant,yet available Cu and Zn are just in the right amounts.