Which nutrient becomes less available in highly acidic soils?

In highly acidic soils, the availability of calcium significantly decreases. When the pH level of the soil drops, it can lead to a condition known as soil aluminum toxicity, which occurs when aluminum becomes more soluble and can harm plant roots. Additionally, acidic conditions can disrupt the nutrient exchange processes in the soil, making it more difficult for plants to absorb essential nutrients like calcium. Calcium plays a crucial role in cellular functions, enzyme activity, and membrane stability in plants. When calcium is less available due to high acidity, it can adversely affect plant growth and development.

While potassium, nitrogen, and phosphorus can also be influenced by soil acidity, they do not exhibit the same pronounced decrease in availability as calcium does under these conditions. Thus, understanding the relationship between soil pH and nutrient availability is critical for effective soil management and optimal plant health.