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Stack #4684563

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Soil is loose weathered material on earth's surface in which plants can grow. It is a mixture of rock particles, minerals, decayed organic matter, water, and air. 2. Bedrock is the solid layer of rock beneath the soil. 3. Humus is a dark colored substance that forms when plants and animals decay. 4. Geologist look a 3 things to identify the type of soil
Soil Fertility: How well the soil supports plant growth
Soil Texture The feel and size of the particles in the soil
Soil pH How much acid is in the soil
. O Horizon Made of organic material of plant and animal remains
A Horizon: Made of topsoil
B Horizon Made of subsoil
C Horizon Made of bedrock that is beginning to weather and break apart
Bedrock Solid layer of rock
How is humus formed: A. Decomposers: breaks up remains of dead plants and animals. B. Burrowers: Mix up the soil
Created by: user-2007950
 

 



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