Which of the following is a primary characteristic of perlite as a soil amendment?

Perlite is a volcanic glass that, when heated, expands into a lightweight, porous material. One of its primary characteristics as a soil amendment is its ability to improve drainage and aeration in the soil. When mixed with heavier soils, perlite creates air pockets, which facilitates the movement of air and water through the soil. This cation and anion exchange capability leads to enhanced root growth and overall plant health, particularly in potted plants or situations where water retention and soil compaction may be issues.

Furthermore, perlite does not retain moisture like some other amendments but rather helps soil lose excess moisture, preventing issues such as root rot. Its neutral pH also means it does not alter the acidity of the soil, maintaining a balanced environment for plants. Overall, the ability of perlite to provide excellent drainage and aeration is a critical benefit that supports a healthy growing medium.