“…This should be due to the great presence of acids in the soil, which was shown via the total acidity result at both sites. This was the result of the oxidation of acid-sulfate-bearing materials in soil [ 10 , 11 ]. Low soil pH adversely affects plant development, because the condition can not only elevate concentrations of soil toxicities, e.g., Fe 2+ , Al 3+ , and Mn 2+ [ 39 ], but also minimize the nutrient availability of P, Mg, and Ca [ 40 ], leading to a lack of essential nutrients for plants.…”