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Envi sci 12/15 test

Terms in this set (19)

Ecosystem stability
Its ability to resist change
Stability
Insurance against catastrophe
Resilience
Ability to recover from external disturbance
Inertia
Ability to resist disturbance
Zonation
Change due to some environmental factor
Humus
Organic matter in soil
Clay
Small particles allow for mineral exchange and help to hold moisture
Silt
Easily erodes
Sand
Helps room penetrate the soil
Wetland soils
Are hydrocarbon soils, meaning they are constantly saturated
What makes good soil?
Micronutrients and macronutrients
Environmental impact assessment
A detailed survey required before major development. It is independently funded.
parts of an EIA
-purpose and need
-alternatives
-affected environment
-environmental consequences
Types of soil degradation
-salinization
-deforestation
-erosion
-unsustainable agriculture
-irrigation
Human causes of soil degradation
-overgrazing
-unsustainable agriculture
-deforestation
-irrigation
Terracing
Replacing of the shape with a series of horizontal terrances separated by walls
Set-aside
Farmers have to put aside an amount of their harvested land and not use them for agricultural. They are paid to not utilizing their land
Multi-cropping
Growing of two or more crops simultaneously on the same piece of land
Agribusiness
-large scale monoculture
-intensive use of fertilizers and pesticides
-mechanized ploughing and harvesting
-food production for mass markets (export(
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