What is a common method to increase pH levels in soil?

Applying agriculture lime is an effective method to increase pH levels in soil due to its composition, primarily calcium carbonate. In acidic soils, which have a low pH, the addition of lime neutralizes the acidity, leading to an increase in pH levels. This process not only raises the pH but also enhances nutrient availability and promotes healthier plant growth by improving the overall soil structure.

In contrast, nitrogen fertilizers tend to lower pH levels due to the nitrogen conversion processes that release hydrogen ions, which can increase acidity. Applying sulfur, on the other hand, is used to decrease soil pH as it reacts in the soil to form sulfuric acid, making the soil more acidic. While manure can add organic matter and nutrients to the soil, it does not specifically target the increase of pH levels and may vary in its effect depending on its composition. Thus, agriculture lime is the most appropriate and common method to effectively raise soil pH.