What effect does lime have on soil pH levels?

Lime is commonly used in agriculture to modify soil properties, particularly to increase the pH levels of acidic soils. When lime is added to the soil, it undergoes a chemical reaction that releases calcium ions, which react with hydrogen ions present in the soil. This process effectively raises the pH level, making the soil less acidic.

Increasing the pH of the soil is crucial because it creates a more favorable environment for plant growth. Many crops and plants thrive in neutral to slightly alkaline conditions, and excessively acidic conditions can hinder nutrient availability and plant health. Therefore, lime is primarily used to counter acidity in soils, promoting better agricultural productivity.

In contrast, reducing the pH or having no effect at all would not align with the established role of lime in soil management practices. It is specifically recognized for its ability to help in soil amendments, particularly in regions where soil acidity is a concern.