What is the primary benefit of applying gypsum to soil?

Applying gypsum to soil primarily provides the benefit of improving soil structure and enhancing water infiltration. Gypsum, or calcium sulfate, acts by displacing sodium ions in the soil, which can lead to soil dispersion and compaction. When gypsum is applied, it helps to flocculate soil particles, encouraging the aggregation of soil, which creates more pore spaces. This aggregation is crucial for promoting better air circulation and allowing water to move more freely through the soil profile.

Additionally, improved soil structure enhances root penetration and increases the overall availability of nutrients, contributing to healthier plant growth. The improved water infiltration reduces runoff and erosion, making it a valuable amendment for agricultural practices.

The other options do not align with the primary benefits of gypsum use. For instance, it does not enhance soil acidity, increase salinity, or directly reduce soil compaction on its own; rather, it addresses these issues through its impact on soil structure and water movement.