What probably caused an increase in salinity of soils in Neolithic farming communities?

Question

Quizplus · Accepted Answer

Overirrigation is the most likely cause of an increase in salinity of soils in Neolithic farming communities. When excess water is used, it can dissolve minerals in the soil and bring them to the surface where they accumulate and cause salinity. This can eventually lead to decreased crop yields and soil fertility. Droughts and unseasonable precipitation may have an impact on soil salinity, but are not as likely to be the primary cause.

What Probably Caused an Increase in Salinity of Soils in Neolithic