Essential plant nutrients, available forms and sources
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Nutrients
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Available forms
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Specific sources
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Organic
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Inorganic
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Carbon (C)
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CO2 (mainly by stomata)
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Air, atmosphere
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Hydrogen (H)
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H2O, H+
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Soil water
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Oxygen (O)
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CO2, O2 , OH–, O—
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Air, Soil atmosphere
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Nitrogen (N)
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NO2– ,NH4+ , NO3– , Urea {CO(NO2) foliar application}
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Protein, Nucleic acid, Chile salt peter, Nitre,
Urea, Manures. Fertilizers.
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Phosphorus (P)
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H2PO4–, HPO4—, PO4—
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Nucleic acid, Manures, Apatite, Strengite,
Phospholipids. Variscite, Fertilizers.
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Potassium (K)
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K+
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Manures Orthoclase, Muscovite
Biotite, Fertilizers.
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Calcium (Ca)
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Ca++
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Manures Apatite, Calcite,
Dolomite, Fertilizers.
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Magnesium(Mg)
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Mg++
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Manures Dolomite, Epsomite,
Fertilizers.
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Sulphur (S)
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SO4—, SO3—
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Amino acids-Cystein, Pyrite, Gypsum, Galena,
Methionine, Manures Fertilizers.
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Iron (Fe)
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Fe++, Fe+++
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Manures Olivine, Biotite, Fertilizers.
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Manganese (Mn)
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Mn++ , Mn++++
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Manures Ferromanganese minerals,
Fertilizers.
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Copper (Cu)
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Cu+ ,Cu++
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Manures Chalcopyrite, Fertilizers.
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Zinc (Zn)
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Zn++
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Manures Sphalerite, Fertilizers.
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Molybdenum(Mo)
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MoO4—
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Manures Fertilizers.
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Boron (B)
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H3BO3, H2BO3–, HBO3—,
BO33-, BO22-
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Manures Borax, Fertilizers.
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Chlorine (Cl)
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Cl–
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Manures Fertilizers.
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