Unit 4 quiz-nr

The soil horizon with the most organic matter is the:

• A horizon

• B horizon

• C horizon

• R horizon

When Nick was trying to determine how much fertilizer to use on his fields, he asked the county agriculture agent and was told that he should:

• use 25 pounds of fertillizer

• perform a nutrient analysis or soil test

• contact a fertilizer distributor

• perform a plant tissue analysis

Soils that contain 50% solid materials and 50% pore space, with half of the pore space containing water and the other half filled with air, are considered:

• eroded

• ideal

• poor

• saturated

The largest soil particles are:

• clay

• loam

• silt

• sand

The mineral and organic matter that forms soil is called

• capillary water

• clay

• humus

• parent material

Roy was discussing soils with his instructor and was told that granular, platy, and blocky are terms sometimes used to describe soil characteristics. Which soil property was the instructor describing?

• color

• permeability

• structure

• texture

Fred's family owns steep forestland in the mountains and a home on the beach. To his surprise, he learned that the land classification for both locations was:

• A

• D

• II

• VIII

While evaluating a soil profile, Juan determined the erosion class to be "none to slight" because:

• the top six inches were alike in characteristics

• the subsurface layer was mixed with the topsoil layer

• most of the original topsoil was gone

• one half of the top six inches was clay

While observing a specimen of soil, a student noticed that it had a grayish color. After some research, she found that the grey color should have been caused by:

• carbonic acid formation

• high iron content and organic matter

• quartz parent material and excellent drainage

• wet soil and quartz parent material

The steepness of terrain affecting the speed at which water flows is which soil forming factor?

• climate

• living organisms

• parent material

• topography