In the process of agricultural production, and heavy metals into the soil in which the accumulation is leading to large-scale use of sewage and irrigation labor way pesticides and fertilizers and the like.
In the course of agricultural production, heavy metals enter farmland soil and accumulate the large use of pesticides and fertilizers, as well as sewage irrigation methods.
In the process of agricultural production, heavy metals enter the farmland soil and accumulate in it, which is caused by the large use of pesticides and chemical fertilizers and the way of sewage irrigation