Soil Pollution is the contamination of soil caused by the addition of chemical substances resulting in the reduction of soil productivity and adversely affecting yield of the crops grown on it. The toxic substances percolate through the soil layers underneath to contaminate the ground water. The agricultural waste primarily due to farmland drainage contains washings […]
Soil Pollution is the contamination of soil caused by the addition of chemical substances resulting in the reduction of soil productivity and adversely affecting yield of the crops grown on it. The toxic substances percolate through the soil layers underneath to contaminate the ground water. The agricultural waste primarily due to farmland drainage contains washings of chemical fertilizers which contribute to the soil pollution. Soil pollution differs from water pollution and air pollution in the sense that the pollutants remain in the direct contact with the soil for relatively long periods, sufficient to change the chemical and biological properties of the soil. The hazardous chemicals can also enter the human food-chain from soil or water plants and endanger it.
CAUSES OF SOIL-AGRICULTURAL POLLUTION
EFFECTS OF SOIL-AGRICULTURAL POLLUTION
The effects of soil-agricultural pollution are harmful and are associated with the sources causing pollution, as enumerated below.
Soil Pollution can be effectively controlled by talking suitable measures against all the major sources causing contamination of soil. Domestic sewage should be fully treated through chemical and biological methods before disposing the final effluent land for disposal. All industries wastes should be treated at source before letting them into the sewers or water bodies for disposal. Proper care should be taken in treating heavy metal wastes and other obnoxious materials. Municipal wastes need to be properly segregated. All the biodegradable wastes should be scientifically treated before disposal. The non-biodegradable wastes should be sorted out and discarded stuff like paper, plastics etc. removed for recycling and reuse. As leachates flow over land surfaces and cause nuisance due to bad odor and contamination of surface and ground water sources, their entry can be prevented by lining the pit with suitable plastic or cement concrete material. Alternatively controlled tripping may be used. In this, wastes are spread in thin layers, closely compacted and then topped by layer of soil.
Alternate Soil and solid waste layers pile to fill up the depression in the ground. With passage of time, the trash is decomposed on its own and turns ground into reusable soil. Modern practice of intensive agriculture contributes to the deterioration of agriculture land. Proper agricultural practices should therefore be followed to enable soil retain its fertility and productivity.