Pollution & Degradation

Introduction:

Soil degradation refers to the process by which soil fertility is reduced2q by various factors like wind, water, human activities and deforestation.

Body:

Causes of Soil Degradation:

1. Overgrazing: A contributing factor for soil erosion, reduced vegetation cover and loss of soil nutrients. It destroys top surface soil which leads to an increase in erosion rates.
2. Urbanization: Growth of Urban cities and infrastructure development leads to reduction in soil vegetation cover and loss of fertile land.
3. Physical factors: Various factors like rainfall, floods, wind erosion causes land degradation, washes away top soil and organic matter.
4. Over fertilization: Excessive usage of chemical fertilizers contribute to soil contamination and degradation of soil.
5. Quarrying activities: They release toxic chemicals into the soil degrading its fertility. Industrial wastes are equally harmful and they affect physical, chemical and biological properties of the soil.
6. Deforestation: Removal of trees and forest cover can lead to an increase in soil erosion, reduces vegetation cover and nutrient loss. Soil minerals get exposed while removing crop cover which plays a key role in soil formation.

Consequences of Soil Degradation:

1. Loss of agricultural productivity: Soil infertility affects crop growth and the land becomes unsuitable for agriculture production. It will impact food security nd public distribution system.
2. Health complications: Soil which is contaminated with chemicals like arsenic, lead, fluorine etc. can cause severe health issues. Ex: Fluorosis in Nalgonda has affected lakhs of people.
3. Water systems: Pollutants may enter water sources affecting the water quality. Degraded soils lose their capacity to hold water, thereby, a reduction in water retention and availability.
4. Loss of Biodiversity: Degraded soils will lose the potential to support plants and animal’s life. Consequently, biological activity of the soil also decreases.
5. Flooding: The soil’s ability to absorb water decreases, leading to frequent surface runoffs and erosion of soil.

Sustainable Land Management Practices:

1. Afforestation: Plant more trees to reduce soil erosion, rebuild organic matter, and restore the environment. Forest conservation programs will aid in in restoring vegetation cover and soil fertility.
2. Conservation Tillage: Soil disturbance can be reduced by no tilling or reduced till farming till the soil structure is maintained.
3. Organic Farming: Utilizing organic fertilizers and bio-pesticides enhance soil-fertility and reduces soil pollution.
4. Land Rehabilitation: It involves restoring the soil fertility by reforestation and adding plant residues that helps in enriching the soil.

Role of Government policies

1. Land regulation acts: Implementing laws and regulations that enforces to prevent deforestation, over-gazing and promote afforestation. Ex: Green India mission.
2. Public Awareness: Conducting awareness programs about the significance of soil health and sustainable management practices. Ex: Soil Health card scheme
3. Tracking and assessing: Implementing system for tracking soil health and assessing the land management practices.
4. Infrastructure development: Building infrastructure for water management practices such as rain water harvesting and drainage systems.

Conclusion

By adopting appropriate sustainable land management practices and government policies can help in combating soil degradation and establishes a sustained health and long-term productivity.