Which among the following fertilizers is least likely to affect the Soil pH? [A] Urea [B] Rock Phosphate [C] Ammonia [D] Muriate of potash Show Answer Correct Answer: D [ Muriate of potash ] Notes: In comparison to N and P, the K fertilizers are least likely to affect the soil pH. Also note that among N, P and K, Nitrogen is the main nutrient affecting soil pH. Nitrogen fertilizers can make soil more acidic as well as more alkaline. Advertisement
