Agricultural lime, which is composed of primarily calcium carbonate.
The farmers put lime water on acidic soil.
lime water
Many plants do not do as well in acidic soil. The lime makes the soil less acidic, or even basic.
add lime...
To neutralise a sample of soil, you must determine the pH of the soil sample either acidic or alkaline. Add lime (e.g. Limestone) to acidic soil to neutralise it. And add sulphur to alkaline soil which will neutralise it.
Chalk is sometimes added to soil to raise the pH of acidic soils. Calcium, the primary component of chalk, is also an important secondary nutrient for healthy crop growth.
Add some dolamite
Add lime
they add water
Plants grow better in soil with the PH (acid-base) they have adapted to. The acidity or the alkalinity of the soil is important to know in order to grow a particular plant. Some plants want a acidic soil and some want a basic soil. However, most plants prefer a neutral to slightly alkaline soil. So, it is important for the farmers to know what type of soil it is in order to balance or neutralize the soil. They should know what type of inorganic substance/fertilizer to add in order to neutralize the soil.
Calcium Hydroxide (or Slaked Lime) is a strong base (as are all metal hydroxides, oxides, and carbonates) A Base is a substance with a pH of 8 or more. When an acid and a base react, the result is that a salt and water is formed. This also has the effect of neutralising a substance (giving it a pH of 7 or closer to 7) So slaked lime is added in order to reduce the acidity of the soil
add calcium carbonate