Definitions/Soil Texture Triangle
Define hydroponics
The practice of growing plants without soil
What is a medium
A material that provides a plant with nourishment and support through their roots
How does the climate and location affect soil formation?
temperature cause rocks to expand and contract thus breaking them up; steep slopes prone to a lot of erosion and weathering
What are the characteristics of the O Horizon?
organic matter
What are the three main particles of soil?
Sand, silt, clay
Define permeable
Permits the movement of water/air through the soil
Name three types of media
peat moss, perlite, vermiculite
What is parent material?
The material from which soil develops; the C-Horizon
What are the characteristics of the A Horizon?
topsoil, contains organic matter
Name the soil particles in order from largest to smallest.
Sand, silt, clay.
Define tillable.
Soil that is workable with tools and equipment
Name one moss used as media
peat moss
How does topography affect soil formation?
The lay of the land can encourage erosion, build-ups, draining problems, etc.
What are the characteristics of the B Horizon?
subsoil, less permeable
Which soil particle allows for the most permeability?
Sand
Define leached
When nutrients and elements are washed out of the soil
Name two mineral materials used as media.
vermiculite, perlite
What is weathering?
The breaking down of soil through precipitation, temperature, and other weather patterns
What are the characteristics of the C Horizon?
parent material, large chunks of rock
Which soil particle allows for the least permeability?
clay
60% Sand, 10% Silt, 30% Clay
(Sandy Clay Loam.)
10% Sand, 60% Silt, 30% Clay
(Silty Clay Loam.)
45% Sand, 40% Silt, 15% Clay
Loam
34% Sand, 17% Silt, 49% Clay
(Clay.)
4% Sand, 49% Silt, 47% Clay
(Silty Clay.)