Soil - a hidden habitat, 2011 July web

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Makes aware of a hidden habitat: soil animals and micro-organisms are essential for fertile soils and safe production of food. Effects of diffrent farmers' practices are briefly mentioned

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Soil - a hidden habitat, 2011 July web

  1. 1. Soil -<br />A Hidden Habitat<br />By Winfried Scheewe, 14 October 2010<br />
  2. 2. Why hidden? <br />Who lives there? What is going on there?<br />What farmers are doing?<br />What are the effects?<br />
  3. 3. Who lives there? 1<br />Tardigrade<br />or Water Bear<br />
  4. 4. Who lives there? 2<br />Nematodes<br />
  5. 5. Who lives there? 3<br />Actinomycetes<br />Fungi<br />
  6. 6. Who lives there? 4<br />Protozoa<br />Algae<br />
  7. 7. One handful of fertile soil can contain :<br />100 Insects and mites<br />110 Worms<br />250 Springtails<br />25,000 Nematodes<br />7,500,000 Protozoa<br />12,500,000 Algae<br />100,000,000 Fungi<br />125,000,000 Bacteria<br />
  8. 8. What is going on in the soil?<br />There are many kinds of soil animals and micro-organisms<br />What are their roles?<br />
  9. 9. Functions of soil organisms<br />Decomposing organic stuff<br />Maintaining a sponge like structure<br />Providing nutrients to plants<br />
  10. 10. Decomposing organic stuff<br />
  11. 11.
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  14. 14.
  15. 15.
  16. 16.
  17. 17. Soil organisms help to bind soil particles together, give it a sponge like structure.<br />
  18. 18. Fixing Nitro-<br />gen<br />
  19. 19. Providing nutrients to plants<br />Mycorrhizae<br />
  20. 20. Effects of farmers’ practices on the soil organisms<br />
  21. 21. Most pesticides are harmful <br />to soil organisms<br />
  22. 22. Application of fertilizers<br />
  23. 23. Effects of farmers’ practices<br />Soil compaction <br />
  24. 24. Burning of crop residues<br />
  25. 25. Bare soil after burning the stubbles<br />
  26. 26. Differences farmers can make<br />Returning rice straw<br />
  27. 27. Example: Farm of Isidro Prado<br /><ul><li>After 15 years of using fertilizers,Zinc deficiency became a problem, yield declined by 60 to 70%
  28. 28. Straw application:  within two years, yield back to normal levelsof over 4.5 t/ha(40 sacks from 0.38 ha)</li></li></ul><li>Differences farmers can make<br />
  29. 29. Soil cover<br />Soil erosion<br />corn with a cover crop<br />
  30. 30. Preventing soil erosion with hedgerows and mulch<br />
  31. 31. Thank you !<br />

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