Why is it useful to measure soil pH in farming?

• A. To determine the best growing location and how to neutralise the soil.
• B. To estimate wind patterns.
• C. To measure soil colour.
• D. To predict rainfall.

Answer: (A)

Measuring soil pH tells you how acidic or basic the soil is, and that matters because nutrient availability to plants depends a lot on pH. Most essential nutrients are most available to roots within a certain pH range. If the soil is too acidic or too alkaline, plants can struggle to take up nutrients like phosphorus, iron, and calcium, even if those nutrients are present. Knowing the pH lets farmers decide how to adjust the soil—adding lime to raise pH (make it less acidic) or sulfur to lower pH—so nutrients stay available and crops grow well. It also helps you choose suitable crops for that soil and plan the right amendments to reach the optimal pH. The other options aren’t related to pH measurement: wind patterns, soil colour, and rainfall are not determined by soil pH.