Soils Video 2

What is the composition of a handful of soil?

• 45% mineral, 25% Water, 25% Air, 5% Organic Matter

• 60% solid material, 20% water, 20% air

• 40% solid material, 30% water, 30% air

• 45% solid material, 30% water, 25% air

What are the three primary particle types in soil?

• Sand, Silt, Gravel

• Clay, Loam, Humus

• Topsoil, Subsoil, Bedrock

• Sand, Silt, Clay

How many clay particles could fit in a single grain of sand?

• 100 million

• 10 million

• 50 million

• 200 million

What is the best mix of sand, silt, and clay in soil called?

• Sandy soil

• Silty soil

• Loam

• Clayey soil

What is the top layer of soil called in a soil profile?

• A horizon

• O horizon

• B horizon

• C horizon

What is the best method for soil sampling when there is variability in a field?

• Zone sampling

• Grid sampling

• Random sampling

• Whole field sampling

What is the depth recommended for soil sampling in farming operations?

• 12 inches

• 24 inches

• 6 inches

• 18 inches

What is the primary purpose of grid sampling in soil analysis?

• To measure soil pH

• To identify soil horizons

• To save time and money

• To make detailed maps of the field

Where can you find information about different types of soils in your area?

• Soil science textbook

• Agricultural store

• Online web soil survey

• Local library