Soil Basics
What is anthropogenic soil?
The horizon made of organic material on the surface.
What is the O Horizion?
The most fertile soil order.
What are Mollisols?
Which role of soil is NOT correct: filtering water, supporting organisms, filtering air, or providing nutrients?
What is filtering air?
How many microorganisms are in one teaspoon of healthy soil?
What is up to 1 billion?
Fertilizers are used to replace this in the soil.
What are nutrients?
The parent material horizon.
What is the C horizon?
Soils that are undeveloped and either very young or old.
What are Entisols?
Correct percentages of soil components.
What is 45% mineral, 25% air, 25% water, 5% organic material?
One function of good microorganisms in soil.
What is decomposing organic matter?
How many years does it take for soil to develop?
What is more than 1000 years?
This horizon is also called topsoil.
What is the A horizon?
These soils are highly weathered and most developed but unfertile.
What are Oxisols?
Define topography in soil science.
What is the position of the landscape where the soil is found?
Charcoal provides this benefit to soil.
What is maintaining and holding added nutrients?
The process where water carries dissolved materials down through soil.
What is leaching?
Which horizon is the leaching (eluviation) layer?
What is the E horizon?
This dryland soil is associated with long droughts.
What are Aridsols?
Which soil forming factor is NOT one of the five? Parent material, topography, time or location.
What is location?
What is false?
How many soil types (orders) are recognized worldwide?
What is 12?
Put these in order from top to bottom: A, C, O, B, E
What is O, A, E, B, C
Name two soil types that are typically considered unfertile.
What are Spodosols and Ultisols?
Soil orders are classified by these four properties.
What are color, texture, type of minerals, and organic matter content?
Name two negative human impacts on soil health.
What are erosion from tillage, chemical overuse, deforestation, pollution?