Soil Basics
What are the four major parts of soil?
What is inorganic matter, water, air, organic matter?
What is parent material?
What is the mineral layer from which soil forms?
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:
What is ideal?
What is erosion caused by natural processes called?
What is geological erosion?
What do Roman numerals I–VIII represent in soil classification?
What is land judging classes?
Which soil particle is the largest?
What is Sand?
What factor of soil formation is influenced by precipitation, temperature, and wind?
Climate
Shaina found that a soil sample felt gritty and was unable to stick to her finger. She determined the texture to be:
Which type of erosion is the most common in the United States?
What is water erosion?
Which land capability class is the best for agriculture?
What is class I?
What is humus?
What is well-decomposed organic matter?
The steepness of terrain affecting the speed at which water flows is which soil forming factor?
What is topography?
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?
What is soil structure?
While evaluating a soil profile, Juan determined the erosion class to be "none to slight". Why?
What is the top six inches were alike?
What is it called when rows of trees are planted to prevent soil erosion on level, sandy land?
What is a windbreak?
Which form of water in soil is most available for plant roots?
What is capillary water?
Which layer of soil, also called subsoil, has little organic matter and more minerals than the A horizon?
What is the B horizon?
Phil used his thumb and extended forefinger to apply pressure to a clump of soil. It offered no resistance to crumbling. He determined that the consistency was:
What is friable?
The use of riprap, fabrics, straw, vegetation, or concrete on a creek or roadside bank to prevent erosion is called:
What is stabilizing banks?
Which slope class is defined as 0–2%?
What is nearly level?
If a soil was found to be 80% sand, 10% clay, and 10% silt, would the soil have fast, moderate, or slow drainage? Why?
What is fast drainage?
Though the O horizon in a soil profile is made up of organic matter, it is:
What is not a true soil?
The science of soils is properly called:
Planting different crops in alternate sections on sloping land is called:
What is strip cropping?
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:
What is class VIII?