What is a common effect of acidic soils on plants?

Acidic soils have a significant impact on plant health and nutrient dynamics. When soil pH drops below the optimal range for most crops, it can lead to decreased nutrient availability. This happens because certain nutrients, such as phosphorus, calcium, and magnesium, tend to become less available to plants at lower pH levels. Additionally, essential micronutrients like manganese and aluminum can become more soluble and toxic to plants as pH decreases.

In acidic conditions, beneficial microbial activity may also be inhibited, which affects decomposition and nutrient cycling in the soil. Consequently, while some nutrients might be more readily available in acidic conditions, the overall balance can lead to deficiencies that hinder plant growth and development. This is why the correct answer highlights the decreased availability of nutrients as a common effect of acidic soils on plants.