What is the ideal soil pH range for optimal nutrient availability?

• A. 5.0 to 6.0
• B. 6.0 to 7.5
• C. 7.5 to 8.5
• D. 8.5 to 9.0

Answer: (B)

The ideal soil pH range for optimal nutrient availability is typically between 6.0 and 7.5. Within this range, most essential nutrients necessary for plant growth, such as nitrogen, phosphorus, and potassium, are readily available to plants. Soil pH influences the solubility of nutrients; if the pH is too low (acidic) or too high (alkaline), certain nutrients can become less available or even toxic to plants.

Being at a slightly acidic to neutral pH, this range not only facilitates nutrient uptake but also supports beneficial microbial activity in the soil, which further aids in nutrient cycling and plant health. Soils with a pH below 6.0 or above 7.5 can lead to nutrient deficiencies or imbalances, impacting plant growth and overall landscape health. Proper management of soil pH is, therefore, critical in landscape and agricultural practices to ensure plants have access to the nutrients they need.