What is soil degradation for Class 8?
(i) Temperature and rainfall are the two main climatic factors responsible for soil formation. (ii) Deforestation and the indiscriminate use of chemical pesticides and fertilisers in agricultural lands are two factors contributing to land degradation.
What is physical soil degradation?
Abstract. Physical deterioration of soil involves the destruction of soil structure, dispersion of soil particles, sealing of pores, compression and increasing density, consolidation, compaction and reduced root penetration, low infiltration, waterlogging and runoff, and accelerated erosion.
What can cause land degradation?
The major causes of land degradation include, land clearance poor farming practices, overgrazing, inappropriate irrigation, urban sprawl, and commercial development, land pollution including industrial waste and quarrying of stone, sand and minerals.
What is the meaning of degradation in science?
Degradation. (Science: biochemistry, chemistry) The reduction of a chemical Compound to one less complex, as by splitting off one or more groups.
What is another word for degradation?
What is another word for degradation?
| deterioration | downgrade |
|---|---|
| descent | downfall |
| ebb | devolution |
| demotion | eclipse |
| decay | drop |
What is soil degradation Class 11?
Soil degradation can be defined as the decline in soil fertility, when the nutritional status declines and depth of the soil goes down due to erosion and misuse. Soil degradation is the main factor leading to the depleting soil resource base in India.
What are the effects of soil degradation?
The effects of soil erosion go beyond the loss of fertile land. It has led to increased pollution and sedimentation in streams and rivers, clogging these waterways and causing declines in fish and other species. And degraded lands are also often less able to hold onto water, which can worsen flooding.
Why is soil degradation bad?
Farming practices such as tilling break up the soil and destroy its natural structure, killing many of the vital bacteria and fungi that live there and leaving it vulnerable to being washed away. “Soil is not just useful for helping us grow food,” says Vargas.
Where is soil degradation the worst?
sub-Saharan Africa
What are the effects of degradation?
Its impacts can be far-reaching, including loss of soil fertility, destruction of species habitat and biodiversity, soil erosion, and excessive nutrient runoff into lakes. Land degradation also has serious knock-on effects for humans, such as malnutrition, disease, forced migration, cultural damage, and even war.
What are the practices that are used to control soil degradation explain them briefly?
Answer: Ploughing to rills and contour planting to create small dams across a field, to or impound water flow. Filling small gullies with mechanical equipment or conversion into a protected or grassed waterway. Terracing of slopes to reduce rates of runoff.
How do humans cause degradation?
Overgrazing, over cropping and or deforestation can lead to desertification – the spread of desert like lands due to these human activities accelerating natural erosion of soil. This may occur in areas of deforestation, mountain slopes or as a general practice to plant a seedling for each tree cut down.
What are the three types of soil degradation?
The type of soil degradation refers to the nature of the degradation process (displacement of soil material by water and wind; in-situ deterioration by physical, chemical and biological processes).
Why is soil degradation important?
The importance of soil degradation among global issues is enhanced because of its impact on world food security and quality of the environment. High population density is not necessarily related to soil degradation; it is what a population does to the soil that determines the extent of degradation.
What is the meaning of degradation of land?
Degraded land is land that has lost some degree of its natural productivity due to human-caused processes. However, there is no single internationally-approved definition of “degraded land”. Lands with less than 35 tonnes of carbon per hectare usually imply no forest cover.
How do you stop degradation?
Here are a few to note:
- Wind breaks. Artificial and natural windbreaks, such as shrubs, reduce the erosion effects of wind.
- Terracing. Terracing of slopes reduces the effects of water runoff and helps conserve rain water.
- Strip farming.
- Crop rotation.
What are 3 causes of soil degradation?
Soil degradation causes include agricultural, industrial, and commercial pollution; loss of arable land due to urban expansion, overgrazing, and unsustainable agricultural practices; and long-term climatic changes.
What are the types of land degradation?
For the purpose of this study, the many and varied processes of land degradation have been grouped into six classes: water erosion, wind erosion, soil fertility decline, salinization, waterlogging, and lowering of the water table.
How do you manage soil degradation?
Control of Erosion
- Prevention of soil detachment by the use of cover materials such as plants (ie.
- Crop production techniques (e.g. fertilizing), to promote plant growth and hence surface cover.
- Ploughing to destroy rills and contour planting to create small dams across a field, to retard or impound water flow.
How can we improve land degradation?
This study shows that simultaneously enhancing local and national level governments, land tenure security, and improving market access is the most effective strategy for addressing land degradation.
What is soil degradation and its causes?
Soil degradation is the decline in soil condition caused by its improper use or poor management, usually for agricultural, industrial or urban purposes. It is a serious environmental problem. Soils are a fundamental natural resource, and are the basis for all terrestrial life.
What is soil degradation Class 8?
How can we conserve land resources? Ans: Decline in the productive capacity of land for some time or permanently is known as land degradation.