Louisiana Horticulture Practice Test 2025 – 400 Free Practice Questions to Pass the Exam

Soil pH plays a crucial role in influencing nutrient availability for plants. The pH level of the soil affects the chemical form of nutrients, their solubility, and how accessible they are to plants. In general, most nutrients are readily available to plants at a pH range of 6.0 to 7.5. Below or above this range, certain nutrients can become either less available or toxic, impacting plant growth and health.

For example, at very acidic pH levels (below 6), nutrients like phosphorus may become less available due to chemical reactions in the soil. Conversely, at very alkaline pH levels (above 7.5), micronutrients like iron and manganese can become less soluble and thus less available to plants. This variation can lead to deficiencies or toxicities that affect plant development.

Understanding how pH affects nutrient availability is essential for effective soil management and ensuring optimal plant growth. Adjusting soil pH through amendments can help maximize nutrient uptake, leading to healthier plants.