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为什么要从胎儿期开始考虑育儿

发布时间:2014-02-22 19:32:17  

The Soil Resource:
育儿知识 http://www.pangbaba.cc

Foundation of Terrestrial Ecosystems

The Soil Resource is:
1. A dynamic natural body composed of mineral matter, organic matter, gases and living organisms in which plants grow. 2. The collection of natural bodies occupying the Earth’s surface that support plants and have properties due to the integrated effects of climate and living organisms acting upon mineral material, as conditioned by relief, over periods of time.

Factors Influencing Soil Formation
1. Climate - Temperature & precipitation

2. Living Organisms - Animals (humans too), Plants, & Microorganisms 3. Parent Material - Physical & chemical properties of geologic materials 4. Topography - Landform, slope & aspect
5. Time - Duration over which climate and living organisms have influenced parent material

Old Growth Douglas-fir
Coast Range in Western Oregon

Soil

Vegetation

Desert Grassland
Great Basin, New Mexico

Vegetation

Soil

Pinyon-Juniper Woodland
Northern New Mexico

Vegetation
Soil

Alpine Meadow
Continental Divide, Colorado

Vegetation

Soil

Lodgepole Pine Forest
Front Range, Colorado

Vegetation Soil

Shortgrass Steppe
Central Colorado

Vegetation

Soil

Tallgrass Prairie
Eastern Kansas

Vegetation

Soil

Oak Savanna
Northcentral Wisconsin

Vegetation Soil

Northern Hardwood Forest
Northern Lake States & New England

Vegetation

Soil

What Controls the Geographic Distribution of Soil and Vegetation?

Geological History: The Key to Understanding the Occurrence of Vegetation and Soil

Geological History: The Key to Understanding the Occurrence of Vegetation and Soil


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