A farmer would treat soil with quicklime, slaked lime, or chalk when the soil is too acidic. These substances are alkaline and can neutralize excess acidity in the soil, making it more suitable for plant growth.
Here’s why:
Acidic soil inhibits plant growth:
Many plants thrive best when the soil pH is near neutral (around 7). Acidic soil (pH less than 7) can make it difficult for plants to absorb essential nutrients and can even be toxic to some crops.
Lime neutralizes acidity:
Quicklime (calcium oxide), slaked lime (calcium hydroxide), and chalk (calcium carbonate) are all alkaline and react with the acidic components in the soil to reduce acidity.
Improved soil conditions:
By neutralizing the soil, these treatments improve plant nutrient availability, enhance water penetration, and overall soil health.