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Soil Degradation In The Developing World With Sound


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Soil degradation in developing countries powerpoint program for AGRON 342

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Soil Degradation In The Developing World With Sound

  1. 1. Soil Degradation in the Developing World Kathleen Cue AGRON 342 November 7, 2008
  2. 2. “ Degraded soil means less food. As a result of soil degradation, it is estimated that about 11.9—13.4% of the global agricultural supply has been lost in the past five years.” Chen, et al, 2002
  3. 4. Soil degradation is attributed to: <ul><li>Absence of legume-based rotation </li></ul><ul><li>Excessive Irrigation </li></ul><ul><li>Crop residue removal for fodder/biofuels </li></ul><ul><li>Excessive grazing </li></ul><ul><li>Manure used for household fuel </li></ul><ul><li>Excessive use of plow-based tillage </li></ul><ul><ul><ul><ul><ul><li>The Nature and Properties of Soils, 13 th Edition </li></ul></ul></ul></ul></ul>
  4. 5. Further, soil loss is occurring due to erosion and brick making. <ul><ul><ul><ul><ul><li> </li></ul></ul></ul></ul></ul>
  5. 6. What are ways to restore productivity to degraded soils? <ul><li>Cover Cropping/Crop Rotation </li></ul><ul><li>Agroforestry </li></ul><ul><li>Reduced till/no till </li></ul><ul><li>Fertilization, both organic and inorganic sources </li></ul><ul><ul><ul><ul><ul><li>Roose, Barthes (2000) </li></ul></ul></ul></ul></ul>
  6. 8. Benefits of adopting soil Best Management Practices (BMP): <ul><li>Economic—increased yields, less poverty </li></ul><ul><li>Ethical—reduced hunger, right to eat </li></ul><ul><li>Social—justice, less unrest, local education </li></ul><ul><li>Agriculture—sustainable farming </li></ul><ul><li>Environmental—less erosion, less release of greenhouse gases </li></ul>
  7. 9. The End <ul><li>Sources </li></ul><ul><ul><li>Brady, N.C. and Well, R.R., The Nature and Properties of Soils, 13 th Edition , 2002. </li></ul></ul><ul><ul><li>Chen, J., Chen J.Z., Tan M.Z., Gong Z., “Soil Degradation: A Global Problem Endangering Sustainable Development”, Volume 12, Num. 2/April 2002, </li></ul></ul><ul><ul><li> </li></ul></ul><ul><ul><li>Roose, E. and Barthes, B., “Organic Matter Management for Soil Conservation and Productivity Restoration in Africa: A Contribution from Francophone Research”, </li></ul></ul><ul><ul><li>Scherr, S., “Soil Degradation: A Threat to Developing Country Food Security in 2020?” IFPRI, 1999. </li></ul></ul>