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How does marble’s calcium carbonate content interact with fertilizers?
Marble, primarily composed of calcium carbonate (CaCO₃), plays a significant role in agriculture by interacting with fertilizers to improve soil health and plant growth. When marble powder or crushed marble is applied to soil, its calcium carbonate content neutralizes acidic soils, raising the pH to optimal levels for nutrient absorption. This process enhances the efficiency of fertilizers by preventing nutrient lock-up, particularly for phosphorus, which becomes more available to plants in neutral to slightly alkaline conditions.
Additionally, calcium carbonate reacts with ammonium-based fertilizers, reducing nitrogen loss through volatilization. This interaction stabilizes nitrogen in the soil, ensuring prolonged nutrient release for crops. However, excessive marble application can lead to over-liming, disrupting micronutrient availability like iron and zinc. Farmers must balance marble use with soil tests to avoid imbalances.
In summary, marble’s calcium carbonate acts as a natural soil amendment, synergizing with fertilizers to boost productivity while requiring careful management to maintain nutrient equilibrium.
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