Soils - Part 1
Soils - Part 2
Soils - Part 3
Soils - Part 4
Soils - Part 5
100
This is a mixture of rock particles, minerals, decayed organic material, air and water.
What is SOIL.
100
Organisms that break down animal and plant remains and wastes.
What is DECOMPOSERS.
100
The solid layer of rock beneath the soil.
What is BEDROCK.
100
Soil that is made of about equal parts clay, sand and silt. Best type of soil for growing plants.
What is LOAM.
100
Loose layer of leaves and other material on top of soil.
What is LITTER.
200
The name for decayed plant and animal remains.
What is HUMUS.
200
A layer of soil made mostly of clay and other particles, but with little humus.
What is SUBSOIL.
200
Crumbly dark brown soil that is amixture of humus, clay and other minerals.
What is TOPSOIL.
200
A layer of soil that differs from the layers above and below it.
What is a SOIL HORIZON.
200
The arrangement of soil particles is called ___________?
What is SOIL STRUCTURE.
300
The soil's __________ is determined by the proportion of different sized particles in the soil.
What is TEXTURE.
300
Three benefits of soil are_______?
What is plant growth, shelter and building materials.
300
Why does clay hold more water than silt and sand?
Because the particles are smaller and its harder for water to flow through.
300
These type of soil particles can not hold onto nutrients.
What is SAND PARTICLES.
300
This is the top layer of the Earth's continental crust.
What is SOIL.
400
Why are good bacteria and animals important to the soil?
They help to fertilize the soil.
400
When a farmer plants different crops in order to use different nutrients from the soil.
What is CROP ROTATION.
400
This soil conservation technique helps prevent erosion on sloping hills by heavy rain.
What is CONTOUR PLOWING.
400
Why is loam the best soil for growing most plants?
Because it has equal parts of sand, silt and clay.
400
A rock formation that is the source of soil.
What is PARENT ROCK.
500
The A Horizons is made of ____________.
What is TOPSOIL.
500
Partly weather rock os found in the _____ Horizon.
What is C.
500
The B Horizon consists of _______?
What is subsoil (clay and other particles washed down from A Horizon, little humus).
500
R Horizon consists of __________.
What is bedrock (parent rock).
500
Horizon O contains ____________.
What is ORGANIC MATTER.
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