What is the soil type of Shanghe River, such as saline-alkali land?

This should be judged according to the local environment and cultivation measures in recent years. For example, over the years, a large number of chemical fertilizers have been used, and the soil has accumulated a lot, which will be alkaline. There are a large number of chemical plants in the local area, and there is serious acid rain, so the soil may be acidic. The pH here is not the pH value, but relative to the previous soil environment. The land in the north is usually alkaline.