Agricultural Lime
Description:
- Fine, odorless powder, usually white or grayish-white in color.
- May come in granular forms for easier handling.
- Sold in bags or bulk depending on the supplier and quantity.
Uses:
- Increases soil pH, making it more suitable for plants that prefer slightly alkaline conditions (most vegetables and some fruits).
- Improves nutrient availability for plants by making essential nutrients like phosphorus, potassium, and magnesium more accessible.
- Can help improve soil structure and drainage in some cases.
- May indirectly suppress some fungal diseases that thrive in acidic soils.
Chemical Composition:
- Primarily calcium carbonate (CaCO3) – makes up the majority (usually over 90%)
- May contain small amounts of other minerals depending on the source rock, such as:
- Magnesium carbonate (MgCO3) – dolomitic lime is higher in magnesium.
- Calcium oxide (CaO) – limited amounts, as high levels can be harmful to plants.
- Trace elements like iron (Fe), copper (Cu), and zinc (Zn) – beneficial in small quantities.
Physical Properties:
- Density: Around 2500-2900 kg/m3 (depending on particle size and packing)
- Solubility in Water: Low solubility in pure water. However, becomes more soluble in acidic environments like soil.
- Melting Point: 849°C (1560°F) for calcium carbonate
- Boiling Point: Decomposes before reaching boiling point
Safety Information:
- Generally safe for humans and animals when used according to recommended application rates.
- Inhaling lime dust can irritate the respiratory system.
- Wear a dust mask when handling bulk agricultural lime.
- Avoid contact with eyes, as it can cause irritation.
- Keep out of reach of children and pets.
Additional Information:
- The recommended amount of agricultural lime varies depending on the soil type, initial pH level, and desired outcome. A soil test is recommended to determine the appropriate application rate.
- Overapplying lime can raise the soil pH too high, leading to nutrient deficiencies for some plants.
- Different grades of agricultural lime may be available, such as high-calcium or dolomitic lime (containing magnesium). Choose the appropriate grade based on your soil test results and plant needs.
- Agricultural lime reacts slowly with the soil. It may take several weeks or months to see the full effect on soil pH.
