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Land Resources (Evs)
Land Resources (Evs)
Land Resources (Evs)
Land Resources (Evs)
Land Resources (Evs)
Land Resources (Evs)
Land Resources (Evs)
Land Resources (Evs)
Land Resources (Evs)
Land Resources (Evs)
Land Resources (Evs)
Land Resources (Evs)
Land Resources (Evs)
Land Resources (Evs)
Land Resources (Evs)
Land Resources (Evs)
Land Resources (Evs)
Land Resources (Evs)
Land Resources (Evs)
Land Resources (Evs)
Land Resources (Evs)
Land Resources (Evs)
Land Resources (Evs)
Land Resources (Evs)
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Land Resources (Evs)

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Presentation on the land resources of mainly India

Presentation on the land resources of mainly India

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  • 1. LAND RESOUCES<br />
  • 2. Non-renewable resource<br />Essential for functioning <br />Supports all living beings<br />But is depleting day by day<br />LAND AS A RESOURCE<br />
  • 3. What is soil?<br />The weathered surface of earth’s crust which is associated with living organism and the products of their decomposition.<br />Pedogenesis - process of soil formation<br />The main constituent of land<br />SOIL<br />
  • 4. The process of breaking up of rocks into smaller particles is called weathering.<br />Three types of weathering:<br />Physical<br />Climate<br />Biological<br />WEATHERING<br />
  • 5. LAYERS OF SOIL<br />
  • 6. Red soil<br />Largest soil group<br />Rich in iron, mangnesium<br />Found in maximum parts of India.<br />Black soil(regur)<br />Large clay factor,without gravel<br />Contains high moisture and extrimely sticky<br />Mostly seen in central India <br />TYPES OF SOILS IN INDIA<br />
  • 7. Laterite soil and lateretic soil<br />Lack in fertility and low value for production<br />Contains potash,nitrogen and phosphates<br />Alkaline soil(reh,usar)<br />Found in drier areas<br />Mostly not suitable for cultivation<br />Imperious , thus slow drainage<br />Mountain and forest soils of himalayan region<br />Found in depressions of valley and slopes<br />Provides heavy growth to plants<br />
  • 8. LAND DEGRADATION<br /><ul><li>Land degradation refers to a decline in the overall quality of soil, water or vegetation condition commonly caused by human activities. </li></li></ul><li>Deforestation by fire clearence<br />Wind erosion<br />Water erosion<br />Pollution including industrial wastes<br />Poor farming practises<br />Livestocks including overgrazing<br />CAUSES<br />
  • 9. Loss of quality of soil and decline in vegetation<br />salinity/ brackishness of land<br />Drought<br />Soil erosion<br />shortage of fuelwood and building materials in many areas.<br />EFFECTS<br />
  • 10. Landslides<br /><ul><li>A landslide (or landslip) is a geological phenomenon which includes a wide range of ground movement.
  • 11. Such as downward sliding, falling, or flowing of masses of soil, rock, and debris.</li></li></ul><li>Loss or absence of soil nutrients (e.g. after a wildfire)<br />Erosion of the toe of a slope by rivers or ocean waves<br />Weakening of a slope through saturation by snowmelt, glaciers melting, or heavy rains<br />Earthquakes<br />Volcanic Eruptions<br />Causes Of Landslides<br />
  • 12. Vibrations from Machinery or Traffic<br />Blast’s<br />Construction<br />Forestry Activities<br />Causes Of Landslides (By Human Beings)<br />
  • 13. Falls<br />Soil or Rock masses freefall from Air.<br />Generally result from undercutting by erosion.<br />Slides<br />Failure among one or more narrow planes.<br />Types Of Slides : <br />Slumps,<br />Glide,<br /> Rockslide<br />Types Of Landslides<br />
  • 14. Flow<br />Caused by Internal Displacement in Soil.<br />Types Of Flow :<br />Earthflow<br />Rockslide<br />
  • 15. SOIL EROSION<br />MEANING<br /> The process by which rocks fragments and soil are detached from the original site, transported and then eventually deposited at some new locality is termed as soil erosion.<br />
  • 16. Normal and Geological Soil Erosion<br />(Erosion done naturally)<br />Accelerated soil erosion<br />(Loss of Soil by Man’s Activity)<br />KINDS OF SOIL EROSION<br />
  • 17. Water Erosion<br />Sheet erosion<br />Rill erosion<br />Gully erosion<br />Wind erosion<br />Saltation<br />Suspension<br />Surface creep <br />AGENTS OF SOIL EROSION<br />
  • 18. Landslides or slip erosion<br />Biotic agencies cause soil erosion<br />Overgrazing<br />Deforestation<br />
  • 19. DESERTIFICATION<br />
  • 20. The transformation of aerable or habitable land to desert,as by a change in climate or destructive land use<br />Viewed as both a process and the resulting condition<br />Is a global problem<br />Leads to abandoned,desert like landscapes<br />WHAT IS IT?<br />
  • 21. Overgrazing<br />Deforestation<br />Overcultivation<br />Inappropriate irrigation<br />Drought<br />Climate change <br />CAUSES<br />
  • 22. Reduced biological productivity<br />Biodiversity loss<br />Loss of food security<br />Increase in soil erosion<br />Decreasing water availablity<br />Loss of bio-diversity<br />CONSEQUENCES<br />
  • 23. Afforestation<br />Water conservation<br />Live-stock management<br />Wise-agriculture methods<br />COUNTERING DESERTIFICATION<br />

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