What happens to nutrient availability when soil pH falls below 5.5?

When soil pH falls below 5.5, nutrient availability decreases due to increased acidity in the soil. In acidic conditions, certain nutrients, particularly essential macro and micronutrients such as calcium, magnesium, and phosphorus, become less soluble and less available to plant roots. This low pH can also lead to an increase in the availability of potentially toxic elements like aluminum and manganese, which can further harm plant growth and nutrient uptake.

As a result, plants may exhibit symptoms of nutrient deficiency, leading to poor health and reduced growth. Managing soil pH is crucial for optimizing nutrient availability and promoting healthy plant development, especially in agricultural and horticultural contexts.