Soil
Horizons
Soil Texture
Growing Media Components
Miscellaneous
100
Displaced soil.
What is dirt?
100
This horizon consisnts of unweathered parent rock and is also called bedrock.
What is the R-Horizon?
100
This soil particle is the largest in size.
What is sand?
100
This growing media component is volcanic rock.
What is perlite?
100
The 3 macronutrients found in soil are needed in large amounts for plant growth.
What are Nitrogen, Phosporus, Potassium?
200
This is Dirt, but with living organisms.
What is soil?
200
This horizon is made up of dead plants, twigs, leaves, etc.
What is the O-Horizon or Organic Horizon?
200
60% sand, 15%Clay, 25% Silt
What is Sandy Loam?
200
This growing media is organic in its nature and typically comes from pine, fir, or cypress trees.
What is bark media?
200
This is the proper soil pH for most plants.
What is 6-7?
300
Two factors that affect soil formation.
What are:
Climate
Living Organisms
Parent Material
Landscape
Time
300
This horizon is generally darker than other layers and consists of large amounts of organic matter.
What is the A-Horizon or Topsoil?
300
This soil particle is in the middle of the 3 sizes.
What is silt?
300
This growing media is inorganic in nature and it looks like shiny/silver flakes.
What is vermiculite?
300
Non-organic materials, do not contribute directly to soil fertility but have an influence on water holding capacity and drainage in the soil.
What is sand, silt, and clay OR soil particles?
400
Two soil functions.
What are:
supports plant growth
stores water
habitat for organisms
modifies earths atmosphere
400
This horizon is also called the parent material because it is where our topsoil comes from through weathering over time.
What is the C-Horizon?
400
20% Sand, 30% Clay, 50% Silt.
What is Clay Loam OR Silty Clay Loam?
400
This growing media component is added sparingly to the soil, it provides it with nutrients like N, P, & K.
What is fertilizer?
400
Soil is made up of 5% organic matter, ____% minerals, ____% air, and 25% water.
What is 45% and 25%?
500
Carbon-based material found in soil that is composed of decomposed plants and animals. Also called humus.
What is organic matter?
500
This horizon is below Horizon A. Some taproots grow here.
What is the B-Horizon or subsoil?
500
This soil particle is the smallest in size. It is known for its poor drainage.
What is clay?
500
This growing media component is known for its high salt content.
What is coconut coir?
500
This is the number of years it takes for 1 inch of soil to form.
What is 500 years?