1.Scientific fertilizer consumption is divided into two large groups. First, chemical fertilizer that contains the elements of the main plant include Nitrogen,Phosphorus and Potassium which are used consecutively for a long time to make the soil is acid and make highly acidic soil to not suitable for agriculture. And the other factor,the cultivation of the wrong way makes the soil was born to worsen.
2.The use of pesticides
Chemical decomposition has been slow to residues in soil caused soil pollution.
3.Release the wastewater from the production process
Most of the wastewater that comes from these processes will come to wash through the various chemicals in the industry. For example ,PCB used in the manufacture of paint and plastics, HCB used in the manufacture of synthetic rubber.
4.Dumping
Most soil pollution caused by waste from chemical degradation which decompose difficult. These wastes accumulated in the soil until the cause of soil pollution. In addition ,increased without removal of garbage is how to affect the soil pollution.