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Vocabulary
Formation of Soil
Soil Conservation
Types of Soil
Properties of Soil
100
Process by which natural forces break down rocks
What is weathering?
100
Main ingredient of soil
What are rock particles?
100
Practice of planting different crops on the same field in different years or growing seasons
What is crop rotation?
100
Forms in dry regions and contains little organic matter. Soil formation occurs slowly.
What is desert soil?
100
Refers to the space between soil particles through which water and air may move
What is pore space?
200
Decayed organic matter in soil
What is humus?
200
Most organic matter is found is found in this layer of soil
What is Horizon A?
200
Reducing the number of times fields are tilled or plowed in a year
What is conservation tillage?
200
Forms in cold, dry region. Chemical weathering is slow. Contains a lot of rock fragments.
What is arctic soil?
200
This property indicates soil's composition and how well soil drains
What is the color of soil?
300
Layer of soil with properties that differ from those of the layer above or below it
What is a soil horizon?
300
Most of the matter that breaks down to form humus comes from thes
What are plants?
300
Flat, steplike areas built on a hillside to hold rainwater and to prevent it from running downhill
What are terraces?
300
Forms in warm, rainy region. Heavy rains wash away minerals. Thin layer of humus.
What is tropical soil?
300
This property is determined by the size of the weathered rock particles it contains.
What is texture?
400
Process in which layers or sheets of rock gradually break off
What is exfoliation?
400
Example of an organism that tunels through the soil creating space for air and water
What is an earthworm?
400
Practice of plowing along curves of a slope to channel rainwater away from running downhill
What is contour plowing?
400
Forms in regions with moderate rainfall and temperatures. Dark-colored, rich in organic matter, and good for growing crops.
What is temperate soil?
400
Nutrients in soil must be dissolved in this to reach plant roots.
What is water?
500
Process of wearing down by friction, the rubbing of one surface against another
What is abrasion?
500
Another name for Horizon A
What is topsoil?
500
Rows of trees planted between fields to break or reduce the force of winds that can carry off soil
What are windbreaks?
500
Major type of soil found in New England.
What is temperate soil?
500
How well nutrients dissolve in water in the soil depends upon this
What is a soil's pH or acidity?