Land Resources and Associated Problems

Education based power point presentation for my blog

1. Environment & Media Submitted by: Deekshitha PN Jebin John J LAND RESOURCES & ASSOCIATED PROBLEMS

2. LAND RESOURCES

3. What is meant by land? Land is an essential natural resource, both for the survival and prosperity of humanity, and for the maintenance of all terrestrial ecosystems. Land is not regarded simply in terms of soils and surface topography, but encompasses such features as underlying superficial deposits, climate and water resources, and also the plant and animal communities which have developed as a result of the interaction of these physical conditions.

4. What are land resources? Land resources mean the resources available from the land, thus the agricultural land which contain natural fertilizer for growth of the products sown; the underground water, the various minerals like coal, bauxite, gold and other raw materials. Land resource refers to the land available for exploitation, like non agricultural lands for buildings, developing townships etc

5. Land is a major resource for agricultural development worldwide. The components of the natural land unit can be termed land resources, including physical, bionic, environmental, infrastructural, social and economic components, in as much as they are fixed to the land unit.

6. LAND DEGRADATION

7. What is land degradation? Land degradation is the major consequences of direct interference of human activities in the natural phenomenon. Loss of natural fertility of soil because of loss of nutrients. Pollution of water resources from the contamination of soil through which water sweeps into ground or runoff to the water bodies. Changes in climatic conditions because of unbalanced created in the environment.

8. Causes of land degradation Deforestation is taking place at a faster rate due to increasing demands of timber, fuel and forest products which results into degradation of land resources. The modern agricultural practises, excessive use of fertilizers and pesticides has adversely degraded the natural quality and fertility of the cultivation land. Overgrazing results into reduced growth of vegetation, reduced diversity of plant species, excessive growth of unwanted plant species, soil erosion, and degradation of land due to cattle movement.

9. Prevention for land degradation Strip farming is a practice in which cultivated crops are sown in alternative strips to prevent water movement. Soil erosion is one of the factors responsible for lad degradation. It can be prevented by formation of ridge and furrow during irrigation which lessens run off. Construction of dams usually checks or reduces the velocity of run off so that soil support vegetation.

10. HUMAN- INDUSED LAND SLIDES

11. What is meant by landslide? A landslide happens when rocks, debris, and soil move down a slope. They're also known as landslips Things can go downhill suddenly, or they can slide at the snail's pace of just a couple centimeters a year. They can come from natural causes or from the activities of people. When they are caused from human beings they are called as human induced landslide.

12. Human induced landslides Indiscriminate tree felling, construction, mining and quarrying, combined with heavy rainfall, have increased the fragility of the Himalayan mountains, leading to an increase in the incidence of landslides in the region. They are commonly a result of building roads and structures without adequate grading of slopes, of poorly planned alteration of drainage patterns, and of disturbing old landslides.

13. SOIL EROSION

14. What is soil erosion Soil erosion is a naturally occurring process that affects all landforms. In agriculture, soil erosion refers to the wearing away of a field's topsoil by the natural physical forces of water and wind or through forces associated with farming activities such as tillage. Erosion, whether it is by water, wind or tillage, involves three distinct actions – soil detachment, movement and deposition. Topsoil, which is high in organic matter, fertility and soil life, is relocated elsewhere "on-site" where it builds up over time or is carried "off-site" where it fills in drainage channels. Soil erosion reduces cropland productivity and contributes to the pollution of adjacent watercourses, wetlands and lakes.

15. Prevention Plant grass and shrubs. Add mulch or rocks. Use mulch matting to hold vegetation on slopes. Put down fiber logs Reduce watering if possible. Avoid soil compaction.

16. DESERTIFICATION

17. What is desertification? Desertification is defined as a process of land degradation in arid, semi-arid and sub-humid areas due to various factors including climatic variations and human activities. Desertification, in short, is when land that was originally of another type of biome turns into a desert biome because of changes of all sorts. A huge issue that many countries have is the fact that there are large pockets of land that are going through a process that is known as desertification.

18. Causes Animal grazing is a huge problem for many areas that are starting to become desert biomes. When people are looking to move into an area, or they need trees in order to make houses and do other tasks, then they are contributing to the problems related to desertification. Some farmers do not know how to use the land effectively. They may essentially strip the land of everything that it has before moving on to another plot of land. Urbanisation and other types of land development.

19. Prevention Policy Changes Related to How People can Farm. Policy Changes to Other Types of Land Use. Education Technology Advances. Sustainable practices to prevent desertification from happening.

20. Thank You