Which type of limestone is commonly used for providing magnesium in soil?

Which type of limestone is commonly used for providing magnesium in soil?

• A. Calcitic limestone
• B. Dolomitic limestone
• C. Calcium silicate
• D. Hydrated lime

Answer: (B)

Dolomitic limestone is commonly used for providing magnesium in soil because it contains both calcium carbonate and magnesium carbonate. This dual composition makes it an effective soil amendment for not only raising pH levels but also increasing magnesium availability, which is an essential nutrient for plant growth. In contrast, calcitic limestone primarily comprises calcium carbonate and lacks substantial magnesium content, making it less effective for addressing magnesium deficiencies. Calcium silicate does not provide magnesium and is mainly used for supplying calcium and silicon, while hydrated lime is a source of calcium hydroxide and is effective for increasing soil pH but does not supply magnesium. Therefore, dolomitic limestone is the most suitable choice for enhancing magnesium levels in the soil.

Dolomitic limestone is commonly used for providing magnesium in soil because it contains both calcium carbonate and magnesium carbonate. This dual composition makes it an effective soil amendment for not only raising pH levels but also increasing magnesium availability, which is an essential nutrient for plant growth.

In contrast, calcitic limestone primarily comprises calcium carbonate and lacks substantial magnesium content, making it less effective for addressing magnesium deficiencies. Calcium silicate does not provide magnesium and is mainly used for supplying calcium and silicon, while hydrated lime is a source of calcium hydroxide and is effective for increasing soil pH but does not supply magnesium. Therefore, dolomitic limestone is the most suitable choice for enhancing magnesium levels in the soil.