What is desertification PPT?

What is desertification • Desertification is land degradation process in arid and semi-arid areas. • It is a process by which fertile land is transformed into desert. • It becomes progressively drier • Unable to support any plant growth for food production.

What is desertification PDF?

factors, including climatic variations and human activities, is called desertification. (Anonymous, 1992). It is a slow process of land degradation that exacerbates the quality of. land, leading to decline in its productivity and thus impacting the livelihood of the people. depending on it.

What are the types of desertification?

The classification system used in the preparation of continental desertification maps is based on four classes of desertification: slight, moderate, severe, and very severe. The criteria for each class are as follows: Slight: Little or no degradation of the soil and plant cover has occurred.

What are the causes of desertification?

Various Causes of Desertification

• Overgrazing.
• Deforestation.
• Farming Practices.
• Excessive Use of Fertilizers and Pesticides.
• Overdrafting of groundwater.
• Urbanization and Other Types of Land Development.
• Climate Change.
• Stripping the Land of Resources.

What are the control of desertification?

1. Afforestation and planting of soil binding grasses can check soil erosion, floods and water logging. 2. Crop rotation and mixed cropping improve the fertility of the soil.

What are 3 causes of desertification?

Human activities that contribute to desertification include the expansion and intensive use of agricultural lands, poor irrigation practices, deforestation, and overgrazing. These unsustainable land uses place enormous pressure on the land by altering its soil chemistry and hydrology.

What are the steps of desertification?

Key processes related to desertification include drought, primary production and carrying capacity, soil degradation, and use of water resources. The role of social factors is also important.

What are 6 causes of desertification?

What are the benefits of desertification?

In addition, it provides the storage of carbon, reducing air temperature, raising humidity, stimulating the exchange of air, filtering suspended particles and dust, and reducing gaseous pollution. For all these advantages, we can protect our lands from desertification and control the climate change as well.

What are the main causes of desertification?

‘Climatic variations’ and ‘Human activities’ can be regarded as the two main causes of desertification. removal of the natural vegetation cover（by taking too much fuel wood）, agricultural activities in the vulnerable ecosystems of arid and semi-arid areas, which are thus strained beyond their capacity.

What is the main reason of desertification?

Overgrazing is the major cause of desertification worldwide. Other factors that cause desertification include urbanization, climate change, overuse of groundwater, deforestation, natural disasters, and tillage practices in agriculture that make soils more vulnerable to wind.

What do you mean by desertification?

Desertification Desertification is a type of land degradation in which a relatively dry land region becomes increasingly arid, typically losing its bodies of water as well as vegetation and wildlife. It is caused by a variety of factors.Desertification is a significant global ecological andenvironmental problem…

How does soil erosion and degradation lead to desertification?

In the past 150 years half the soil structure but also the nutrient degradation. of the topsoil on planet Earth has been lost which not only affected  Degraded lands are also often less able to hold onto water thus making the land more prone to flooding. This soil erosion and degradation makes the land more vulnerable to desertification.

How does desertification lead to poverty and famine?

Desertification leads to major drought. As a result, the crop production is very low making food and water very limited. Prices are increased hence people who are economically insufficient fall into poverty which leads to famine. Famine & Poverty 13.

What are the main causes of desertification in the Sahel?

23. The reasons for desertification in the Sahel are: • Human – Large population increases in recent years – has lead to overgrazing of the land to meet higher food requirement. The increased energy requirements have lead to deforestation as more firewood has been needed.