How is agricultural lime produced


Often referred to as “aglime“, agricultural lime is simply limestone that has been pulverized down to a fine particle size and introduced to acidic soil. Lime is selected because it contains such a high amount of calcium, which works to neutralize the soil’s pH levels.Apr 4, 2017


What is agricultural lime and how does it work?

Agricultural lime is injected into coal burners at power plants to reduce the pollutants such as NO 2 and SO 2 from the emissions. Where soils are acidic, lime can improve crop yield and the root system of plants and grass. It does this by making the soil more basic and thereby allowing the plants to absorb more nutrients from the soil.

What is the history of lime industry?

Lime (material) Lime industries and the use of many of the resulting products date from prehistoric times in both the Old World and the New World. Lime is used extensively for wastewater treatment with ferrous sulfate .

How is lime made from limestone?

In some lime plants, the resulting lime is reacted (slaked) with water to form hydrated lime. The basicprocesses in the production of lime are: (1) quarrying raw limestone; (2) preparing limestone for the kilns bycrushing and sizing; (3) calcining limestone; (4) processing the lime further by hydrating; and

How much lime is spread in a hectare of land?

The effort went on and in the late 1990s between 14 million and 16 million tonnes of lime were being spread on Brazilian fields each year. The quantity rose to 25 million tonnes in 2003 and 2004, equalling around five tonnes of lime per hectare.


How is lime manufactured?

The basic processes in the production of lime are: (1) quarrying raw limestone; (2) preparing limestone for the kilns by crushing and sizing; (3) calcining limestone; (4) processing the lime further by hydrating; and (5) miscellaneous transfer, storage, and handling operations.

What is the difference between lime and agricultural lime?

Pure lime is 100% calcium carbonate (CaCO3) Agricultural limestones usually occur, in Victoria, in limestone rock deposits with calcium carbonate (CaCO3) contents ranging from 48% to 97%. Agricultural lime is the most commonly used product for increasing soil pH in pastures and is usually the most cost-effective.

Is agricultural lime natural?

Agricultural lime is a soil amendment product used to condition soil by raising pH levels. It is made from crushed limestone that contains natural nutrients to promote healthy plant growth. When lime is added to agricultural crops, it dissolves and releases a base that counteracts or neutralizes soil acidity.

Is agricultural lime the same as limestone?

A: No. The term agricultural lime, or “aglime,” usually refers to crushed limestone. Limestone (calcium carbonate) is not the same as hydrated lime (calcium hydroxide).

Is agricultural lime the same as dolomite?

As with agricultural lime, dolomitic lime works to increase the pH levels of acidic soil and return the earth to nearly neutral. The primary difference between the two materials is that, in addition to containing calcium carbonate, dolomitic lime also contains a mixture of magnesium carbonate.

Is agricultural lime harmful to humans?

Non-Caustic Lime While broadly speaking, non-caustic limes, or “ag limes” are considered non-toxic for people, pets and the wildlife passing through, non-toxic does equate to a substance being 100% safe. Non-toxic literally refers to a material as not causing death or serious illness.

Is agricultural lime bad for the environment?

Ag-lime improves the physical, chemical, and biological conditions of soil. It increases crop growth, which results from improved nutrient and water use. Improved crop growth helps protect the soil from wind and water erosion.

What is the difference between barn lime and ag lime?

Barn Lime (also referred to as ag lime or dairy lime) has essentially no ability to remove ammonia and odors. Barn lime is simply crushed up limestone, or calcium carbonate, which may cover odors if applied thick enough but does nothing to neutralize odors.

Is pelletized lime stronger than ag lime?

Studies have shown that aglime and pelletized are equally effective and begin working in a similar timeframe, but because pelletized lime is more expensive, it’s not practical for farmers to use in larger fields.

Is ag lime organic?

Lime is a purely natural (organic) fertilizer. This fertilizer is added to the soil to alter soil PH so as to reduce soil acidity. Lime fertilizers can facilitate better nutrient uptake and it’s probably the most economical way to provide additions of calcium and magnesium.

What is agricultural lime used for?

Agricultural lime has been used by farmers for years as a soil improver. It’s also a natural, low-cost way to enhance the effects of regular chemical-based fertilizers. By reducing soil acidity, aglime makes a huge difference to the productivity potential of both arable and grassland farming.

What is the chemical formula for agricultural lime?

CaCO3Agricultural Limestone is the mineral calcium carbonate [chemical formula (pure) CaCO3].

Why is liming important?

The importance of liming has already been referred to in the section on grassland improvement and renovation. Soil acidity is probably the biggest single factor adversely affecting the productivity of grassland and it is one of the most simple to correct.

Why did soil acidity increase in the 1970s?

Research interest in soil acidity increased in the 1970s because of the problems associated with acid rain (Reuss and Johnson, 1986 ). Acid rain studies made many people aware that environmental problems cut across national borders.

What type of soil does thyme prefer?

Thyme prefers a light, dry calcareous soil ; it succeeds in poor soils and tolerates drought once it is established. Agricultural lime should be added to the soil before sowing if the pH is less than 5.5. Successful growing of most thyme species is possible in any climate having a mean annual temperature from 7 to 20°C.

What is the role of calcium and magnesium in soil?

Calcium and Mg are often found in soil minerals originating from geologic parent material, and therefore their plant availability is usually a function of the solubility of those minerals. Plants require approximately the same amount of Mg as they do P, with Ca requirement approximately double of that ( Table 2 ). Soils rich in Ca- and Mg-containing minerals are often found in arid and semiarid areas or are younger soils formed from recently deposited parent material. The source of Ca and Mg are typically carbonate minerals that dissolve with decreases in pH that occur with normal agricultural activities and rainfall. As a result, it is typically not required to fertilize for Ca and Mg in these soils. However, assuming that Ca and Mg are present in the soil, Figure 4 shows that their availability decreases as the pH drops below 6. This is because Ca and Mg are base cations that are held onto the CEC by ion exchange reactions if they are not precipitated as a solid mineral. Therefore, acid pH allows Al 3+ to dominate the CEC and solution, thereby decreasing Ca and Mg activity and allowing them to potentially leach. Course-textured soils in humid areas are generally very low in Ca; however, the application of agricultural lime to manage soil acidity in these soils typically provides sufficient Ca and Mg for optimum plant growth. As soil pH increases above pH 8, Ca and Mg availability decreases as a result of precipitation with carbonates.

Does acidic soil increase C sequestration?

Thus, liming of acidic soils helps to produce more biomass, thereby resulting in increased C sequestration. Addition of plant residues in soil can also have a liming effect, which is dependent on residue chemistry and interactions with the soil environment ( Butterly et al., 2010 ).

Does lime have a sterilizing effect?

Agricultural lime (CaCO3 or CaMg (CO 3) 2) stabilizes the pH of the water but has no sterilizing effect. Burnt lime (quicklime—CaO; or slaked lime—Ca (OH) 2) could have a therapeutic effect against disease, but has a very high pH.

Is lime cheap?

Agricultural limes are relatively cheap and extremely cost-effective. The usual dressing is about 5 t/ha, and the materials that are used on arable land are equally suited to grassland. Magnesian or dolomitic lime can, in addition, have a useful effect on the soil magnesium level if it is deficient.

What is agricultural lime?

Aglime is essentially just limestone or dolomite that has been ground, washed and screened for use as a soil treatment. The chemical makeup of the aglime makes it possible for essential minerals like calcium and magnesium to be reintroduced into the ground and for pH levels to be restored to neutral.

What types of agricultural lime are available?

If you’ve decided to use aglime to improve the soil conditions throughout your property, you’ve probably noticed that you have several different options. You’ll need to be aware of the specifications of each to ensure that you select the right material for your needs.

How should agricultural lime be applied?

In order to get the most benefit from your aglime, you’ll need to keep a few important items in mind throughout the application process: Volume Required – Different plants thrive in soils with varying pH levels.

How quickly does agricultural lime work?

Most users are anxious to see a positive improvement in the pH of their soil, but it’s important to keep in mind that several factors will come into play as the aglime begins to do its work. The first thing to note is that water is required for lime to react with the soil.

How frequently should agricultural lime be applied?

In addition to measuring pH levels which will reveal the active acidity of the soil, it’s also important to consider the cation exchange capacity (CEC) of the earth. The CEC measures both the active and reserve acidity of the soil.

Can agricultural lime be used with other chemicals?

Depending on your needs, it may be important for you to understand how aglime works with:

Where can I get the best prices on agricultural lime?

When purchasing agricultural lime, you should understand that the “best” price isn’t necessarily the same thing as the “cheapest” product.

What is Ag Lime?

Ag lime, or agricultural lime, is a coarse limestone product best suited for agricultural applications. The name ag lime most often refers to a crushed limestone product that is used to improve acidic soil to a neutral pH.

Why use lime in soil?

The benefits of applying a lime soil amendment are a result of lime’s ability to correct soil acidity. Lime applications neutralize the acidity of the soil, allowing plants to absorb previously locked up nutrients. Consequently, a better soil environment is created, allowing plants to yield optimal results. Pelletized limestone, often referred …

What is pelletized limestone?

Pelletized limestone, often referred to as pelletized lime, is created when limestone rock is crushed into a powder and then granulated. The powdered lime is ground to a very fine consistency, allowing the product to dissolve quickly and start working fast. Equipment such as a disc pelletizer is used to form the powder into a granule, …

How is lime powder made?

Powdered (or ground) lime is created by crushing and grinding limestone rock to a powder. By changing to a powdered form, lime can break down quickly and begin working faster than options such as ag lime. When comparing pelletized lime vs. powdered lime, the major difference comes down to ease of handling.

What is used to make lime powder into granules?

Equipment such as a disc pelletizer is used to form the powder into a granule, with binders such as lignosulfonates assisting in the process. There can be much product variation even within the category of pelletized lime.

What is enhanced pelletized lime?

Enhanced pelletized lime products include additives such as micronutrients, polymers, and organic acids. All of these can help in creating ideal conditions for lime and nutrients to be absorbed, providing fast and lasting results. For example, Encap® Fast Acting™ Lime contains:

Is Ag Lime a spreader?

Additionally, ag lime is not well suited for applications outside of agricultural uses. When comparing pelletized lime vs. ag lime, the characteristic that most divides the two products is application handling. While pelletized lime is easily spread with most spreaders, ag lime requires a specialty spreader.

Why use lime in agriculture?

The first obvious benefit to using agricultural lime is that it has been proven time and again to effectively balance out soil pH levels and improve plant health. Soil that has become to acidic as the result of frequent crop cycles or acid rain makes it difficult for nutrients to be absorbed through a plant’s root system or even for water to fully penetrate the earth.

Why is lime important to soil?

Lime is selected because it contains such a high amount of calcium, which works to neutralize the soil’s pH levels. In addition to this, agricultural lime is also able to increase the ability of vegetation to absorb essential nutrients from the ground.

What is the ratio of dolomitic lime to magnesium?

As a general rule of thumb, soil should always have a calcium to magnesium ratio of between 7:1 (for sandier soils) and 10:1 (for more clay-based soils).

How is dolomitic lime made?

As the name suggests, dolomitic lime is manufactured by crushing dolomitic limestone down to very small pieces. As with agricultural lime, dolomitic lime works to increase the pH levels of acidic soil and return the earth to nearly neutral.

What is lime used for?

For centuries, the natural stone product of agricultural lime has been used to improve growing conditions for farm fields, gardens and even residential lawns. While liming is extremely common in the agricultural sector, there are different options to consideration. One of the most common limes compared to aglime is dolomitic lime.

What is aglime made of?

Typically, aglime is spread in its pure, dry “ calcitic ” form, meaning that the product is comprised mainly of calcium carbonate. At the same time, you may also find some other variations of agricultural lime. Liquid lime, for example, is applied using a combination of approximately 50% dry aglime and 50% water.

Why is lime used in the wind?

Because dry lime is so small in particle size, it can be blown in the wind, so it should be applied in calm weather conditions. It should also be noted that agricultural lime reacts more quickly with water. If your soil is particularly dry, it may take more time for you to achieve the desired results.

What are some examples of lime products?

An example is when slaked lime (calcium hydroxide) is mixed into a thick slurry with sand and water to form mortar for building purposes.

What is the process of converting limestone to lime?

The lime cycle for high-calcium lime. The process by which limestone (calcium carbonate) is converted to quicklime by heating , then to slaked lime by hydration, and naturally reverts to calcium carbonate by carbonation is called the lime cycle.

What is kankar lime?

Kankar lime, a lime made from kankar which is a form of calcium carbonate. Selenitic lime, also known as Scotts’ cement after Henry Young Darracott Scott is a cement of grey chalk or similar lime, such as in the Lias Group, with about 5% added gypsum plaster (calcined gypsum ).

What type of lime is used in Portland cement?

In the United States the most commonly used masonry lime is Type S hydrated lime which is intended to be added to Portland cement to improve plasticity, water retention and other qualities. The S in type S stands for special which distinguishes it from Type N hydrated lime where the N stands for normal.

What is pure lime?

Pure lime is also known as rich, common, air, slaked, slack, pickling, hydrated, and high calcium lime. It consists primarily of calcium hydroxide which is derived by slaking quicklime (calcium oxide), and may contain up to 5% of other ingredients.

What is limestone made of?

In the lime industry, limestone is a general term for rocks that contain 80% or more of calcium or magnesium carbonate, including marble, chalk , oolite, and marl. Further classification is done by composition as high calcium, argillaceous (clayey), silicious, conglomerate, magnesian, dolomite, and other limestones.

What is lime used for?

Lime used in building materials is broadly classified as “pure”, “hydraulic”, and “poor” lime; can be natural or artificial; and may be further identified by its magnesium content such as dolomitic or magnesium lime. Uses include lime mortar, lime plaster, lime render, lime-ash floors, tabby concrete, whitewash, silicate mineral paint, and limestone blocks which may be of many types. The qualities of the many types of processed lime affect how they are used. The Romans used two types of lime mortar to make Roman concrete, which allowed them to revolutionize architecture, sometimes called the Concrete revolution .



Agricultural lime, also called aglime, agricultural limestone, garden lime or liming, is a soil additive made from pulverized limestone or chalk. The primary active component is calcium carbonate. Additional chemicals vary depending on the mineral source and may include calcium oxide. Unlike the types of lime called quicklime (calcium oxide) and slaked lime (calcium hydroxide), powdered lime…

Determining the need for agricultural lime

Where soils are acidic, lime can improve crop yield and the root system of plants and grass. It does this by making the soil more basic and thereby allowing the plants to absorb more nutrients from the soil. Lime is not a fertilizer itself, but can be used in combination with fertilizers.
Soils become acidic in a number of ways. Locations that have high rainfall levels become acidic through leaching. Land used for crop and livestock purposes loses minerals over time by crop re…


The quality of agricultural limestone is determined by the chemical makeup of the limestone and how finely the stone is ground. To aid the farmer in determining the relative value of competing agricultural liming materials, the agricultural extension services of several universities use two rating systems. Calcium Carbonate Equivalent (CCE) and the Effective Calcium Carbonate Equivalent (ECCE) give a numeric value to the effectiveness of different liming materials.

Brazil’s case

Brazil’s vast inland cerrado region was regarded as unfit for farming before the 1960s because the soil was too acidic and poor in nutrients, according to Nobel Peace Prize winner Norman Borlaug, an American plant scientist referred to as the father of the Green Revolution. However, from the 1960s, vast quantities of lime (pulverised chalk or limestone) were poured on the soil to reduce acidity. The effort went on and in the late 1990s between 14 million and 16 million tonnes of lim…

Effect on prehistoric mobility studies

A 2019 study demonstrated that agricultural lime affects strontium-based mobility studies, which attempt to identify where individual prehistoric people lived. Agricultural lime has a significant effect in areas with calcium-poor soils. In a systematic study of a river system in Denmark, the Karup River, more than half of the strontium in the river’s catchment area was found to come from runoff of agricultural lime, and not from the surrounding natural environment. Such introduction …

See also

• Marl
• Liming (soil)
• Soil pH

Further reading

• Right Use of Lime in Soil Improvement at Project Gutenberg Transcription of 1919 text by Alva Agee.
• “A Study of the Lime Potential, R.C. Turner, Research Branch, Canadian Department of Agriculture, 1965

Leave a Comment