Download - Soil, importance
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THE IMPORTANCE OF SOIL
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What's the difference between soil and dirt?
wrong place - dirt
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The importance of soil
Life, civilization depend on planet's soil and water resources
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Shortages cause:
ConflictsMigration
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Future
Soil will become even more crucial World population doubles every 40 years
only 7 percent of earth's surface is suitable for agriculture
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Soil is non-renewable resource
Thin, fragile layer of life-supporting material
Supplies plants, animals with all resources they need
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Soil health
Capacity of soil to sustain plant and animal growth
Capacity of soil to maintain air and water quality
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Soil degradation
United Nations report, 2001:
1.75 billion tons of crop soil lost worldwide to erosion
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Reasons for soil degradation
ErosionPollutionDesertification Changes in soil chemistryIncreases in salt levelsLoss of organic matter
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We must take it upon ourselves to practice good soil management and protect our soils.