Soil acidity is a significant challenge across many Australian farming regions and can have a direct impact on crop performance, pasture productivity and fertiliser efficiency. Managing soil pH is an important part of maintaining productive farming systems, and agricultural lime is one of the most widely used tools for addressing acidic soils.
Agricultural lime, often referred to as aglime, is a naturally occurring limestone product used to help neutralise soil acidity and create conditions that better support plant growth. It plays an important role in long-term soil management across cropping, grazing and mixed farming enterprises.
What Causes Soil Acidity?
Soil acidity can develop gradually over time as a result of natural processes and farming practices. The M250 Aglime data sheet identifies several contributing factors, including:
- Leaching of nitrate nitrogen
- Removal of agricultural products from farms
- Use of nitrogen-based fertilisers
- Increasing levels of organic matter
As soil acidity increases, growing conditions can become less favourable for many crops and pastures, potentially affecting productivity and farm performance.
What is Agricultural Lime?
Agricultural lime is a finely ground limestone product primarily composed of calcium carbonate. It is applied to soils to help neutralise acidity and improve soil conditions for agricultural production.
Unlike hydrated lime and quicklime, agricultural lime is specifically intended for soil improvement and agricultural use. Products such as Boral's M250 Aglime are manufactured from naturally occurring limestone and designed to support long-term soil management programs.
Why Soil pH Matters
Soil pH influences many aspects of soil performance and plant development. When soils become too acidic, crop and pasture growth may be affected, and fertiliser efficiency can be reduced. Managing soil pH helps create conditions that are more suitable for productive farming systems.
Maintaining appropriate soil pH can support:
- Plant growth
- Fertiliser efficiency
- Soil performance
- Crop productivity
- Pasture productivity
How Agricultural Lime Helps
Agricultural lime works by supplying calcium carbonate to the soil, helping to reduce acidity and improve growing conditions. The effectiveness of a liming product depends on factors such as its neutralising value and particle size.
Boral's M250 Aglime is manufactured with a high calcium carbonate content and a fine particle size, making it an effective soil ameliorant for agricultural applications.
Benefits of Agricultural Lime
Agricultural lime may assist farming operations by:
Supporting Plant Growth
Improved soil conditions can help support healthy plant establishment and ongoing crop or pasture performance.
Improving Fertiliser Efficiency
By helping manage soil acidity, agricultural lime can contribute to better fertiliser utilisation and soil performance.
Assisting Heavy Soils
Agricultural lime may help improve the condition of heavier soils, supporting more productive growing environments.
Supporting Crop and Pasture Performance
Returning soil pH to conditions that better suit agricultural production can help support long-term productivity.
Why Neutralising Value Matters
Neutralising value (NV) measures a product's ability to reduce soil acidity. It is one of the key indicators used when assessing the effectiveness of agricultural lime products. Higher neutralising values can indicate greater capacity to assist with soil acidity management.
When selecting an agricultural lime product, both neutralising value and particle size should be considered. The combination of these characteristics influences how effectively the product can interact with soil.
Why Particle Size Matters
The fineness of agricultural lime affects how quickly and effectively it can react in the soil. Finer particles provide greater surface area and more contact with soil, supporting improved performance.
This is why particle size distribution is an important consideration when evaluating agricultural lime products.
Choosing the Right Agricultural Lime
When selecting agricultural lime, it is important to consider:
- Soil acidity levels
- Neutralising value
- Particle size and fineness
- Application requirements
- Farm management objectives
The most appropriate product will depend on individual farming conditions and soil management goals.
Related Products
Learn more about Boral's agricultural and lime products: