Geoscience Reference
In-Depth Information
Appendix 16. Mineral elements in plants
Source: Epstein (1972).
Element
Range of
concentrations
Remarks
Dry weight basis
Nitrogen %
0.50-6.00
Essential element
Phosphorus %
0.15 - 0.50
Sulphur %
0.10 -1.50
Potassium %
0.80-8.00
Calcium %
0.10 - 6.00
Magnesium %
0.05-1.00
Iron ppm
20-600
Essential micronutrient
Manganese ppm
10-600
Zinc ppm
10-250
Copper ppm
2-50
Nickel ppm
0.05-5.0
Boron ppm
0.2-800
Chlorine ppm
10-80 000
Molybdenum ppm
0.1-10
Cobalt ppm
0.08-0
Essential in all nitrogen-fixing systems
Sodium %
0.001-8.0
Essential for some plants, often beneficial
Silicon %
0.1-10
Aluminium ppm on
acid soils
Not known to be essential, often toxic to
plants grown in acid soils
0.1-800
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