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In a given soil, the horizon with the highest organic matter content is generally the ___ horizon.
A
fertile
Wind, water, heating and cooling of the rock.
has a large amount of organic material.
The way that soil is formed.
Humus
Tiny pieces of rock, humus, air and sand
7.0
Soil is formed by the breaking up of rocks into tiny pieces, which is called weathering. What are three things that can cause this weathering?
A
fertile
Wind, water, heating and cooling of the rock.
has a large amount of organic material.
The way that soil is formed.
Humus
Tiny pieces of rock, humus, air and sand
7.0
This soil ingredient is made up of decayed plants and animals
A
fertile
Wind, water, heating and cooling of the rock.
has a large amount of organic material.
The way that soil is formed.
Humus
Tiny pieces of rock, humus, air and sand
7.0
Soil is made up of what four main ingredients?
A
fertile
Wind, water, heating and cooling of the rock.
has a large amount of organic material.
The way that soil is formed.
Humus
Tiny pieces of rock, humus, air and sand
7.0
The more humus a soil contains the more _____ it is.
A
fertile
Wind, water, heating and cooling of the rock.
has a large amount of organic material.
The way that soil is formed.
Humus
Tiny pieces of rock, humus, air and sand
7.0
Which of the following pH values represents a neutral condition?
A
fertile
Wind, water, heating and cooling of the rock.
has a large amount of organic material.
The way that soil is formed.
Humus
Tiny pieces of rock, humus, air and sand
7.0
What is soil erosion?
A
fertile
Wind, water, heating and cooling of the rock.
has a large amount of organic material.
The way that soil is formed.
Humus
Tiny pieces of rock, humus, air and sand
7.0
Topsoil is dark in color because it
A
fertile
Wind, water, heating and cooling of the rock.
has a large amount of organic material.
The way that soil is formed.
Humus
Tiny pieces of rock, humus, air and sand
7.0
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