Term
| Soil formation - # of years to form |
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Definition
| worldwide - 15 years per centimeter |
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Term
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Definition
A) topsoil, rich nutrients, vulnerable erosion
B) subsoil, some rock
C) lots of rock |
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Term
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Definition
Parent material (ancient layer rock)- thick A horizon
Forest - thick/thin A horizon
Dessert - thin A horizon |
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Term
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Definition
| source of soil is formed (bedrock) |
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Term
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Definition
| wearing away and transportation of soil by wind, water, or ice |
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Term
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Definition
| deforestation and desertification; ag practices |
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Term
| % of ag land usable US & World |
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Definition
US - 50% land
WORLD - 35% land |
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