Show:
Soil Particles
Soil Textural Triangle
(You can use your triangle handout)
Soil Structure Types
Soil Textures
(Use Soil Texture Flow Chart)
The Dirt Pile
100
Three types of soil particles
Sand, Silt, Clay
100
60% Clay 30% Silt 10% Sand
Clay
100
Structureless, Compacted, Very Slow Permeability
Massive
100
Weak Ribbon LESS than 2.5cm long and feels very gritty.
Sandy Loam
100
How many soil samples did we collect from outside on Monday?
Five
200
The largest soil particle.
Sand
200
30% Clay 40% Silt 30% Sand
Clay Loam
200
Soil particles that cling together to form this arrangement
Peds
200
Medium ribbon strength between 2.5-5cm long and feels very smooth.
Silty Clay Loam
200
The 2 P's of Soil Structure
Porosity and Permeability
300
What test is conducted to determine what soil particles are present?
Ribbon Test
300
10% Clay 60% Silt 30% Sand
Silt Loam
300
Structure type that form vertical blocks
Prismatic
300
Strong ribbon 5cm or longer, neither gritty nor smooth predominates.
Clay
300
What 2 things are found in soil pores?
Water and Air
400
Bad for soil porosity, good for water holding capacity
Clay
400
35% Clay 60% Silt 5% Sand
Silty Clay Loam
400
Structure type with flat peds that lay horizontal in the soil.
Platy
400
Medium strength ribbon between 2.5-5cm long, feels very gritty
Sandy Clay Loam
400
The downward movement of water through the soil profile?
Permeability
500
May seem slick like clay but is not sticky when conducted a ribbon test.
Silt
500
30% Clay 10% Silt 60% Sand
Sandy Clay Loam
500
Structure type with rapid permeability, no binding agents, very sandy
Single Grain
500
Doesn't form a soil ribbon.
Sand or Loamy Sand
500
Name the 2 structureless soil types?
Single Grain and Massive