HORTICULTURE

Detailed explanation-1: -This is probably because irrigation causes more nitrates and other negative ions to dissolve in the soil, which reduces soil pH28. Zhong et al. observed that the soil pH showed no significant differences among different nitrogen fertilization treatments, which is similar to our study24.

Detailed explanation-2: -The generally accepted pH for irrigation water is between 5.5 and 7.5, but some problems can occur within this range. Alkaline water may contain high concentrations of bicarbonate (generally in water of pH 8 and above) and carbonates (generally pH 9 and above).