NUTRIENTS AND THEIR SOURCES
| Nutrients | Sources |
| Nitrogen (N) | Organic matter |
| Phosphorus (P) | Appetite and Al & Fe phosphate |
| Potash (K) | Orthoclase, Micas, Feldspar |
| Calcium (Ca) | Dolomite, Calcite |
| Magnesium (Mg) | Dolomite, Muscovite |
| Sulphur (S) | Gypsum, Pyrite, Organic matter |
| Iron (Fe) | Pyrite, Magnetite |
| Molybdenum (Mo) | Olivine |
| Boron (B) | Tourmaline |
| Manganese (Mn) | Magnetite |
| Zinc (Zn) | Sphalerite |
| Chlorine (Cl) | Appetite |
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