18 Questions
What is the basis for measuring the depth of soil?
To the shallowest root limiting layer
Which of the following factors does NOT affect soil drainage?
Soil aeration
What is the term for the rate at which water moves down through the soil?
Permeability
What is the characteristic of a sandy loam soil?
It forms weak aggregates
What is the gas released when soils are waterlogged?
Hydrogen sulfide
What is the texture class of soil that is loose and single-grained?
Sand
What is the primary characteristic of Silt Loam soil?
It has moderate amounts of fine grades of sand and less than 27% clay
Which type of soil is characterized by forming a firm ball and showing a fingerprint when moist?
Sandy Clay Loam
What is Soil Organic Loss?
The reduction in the amount of organic carbon in the soil
What is the term for the loss of valuable topsoil through water, wind, tillage, or other means?
Soil Erosion
What is the characteristic texture of Silt when dry?
Floury
What is Clay characterized by when it is dry?
Forms very hard or extremely hard blocks or prisms
What type of soil is characterized by high organic matter and water-holding capacity, commonly found in wetlands?
Histosols
Which soil type is formed in acidic forest environments and has a distinctive horizon enriched with organic matter and iron/aluminum oxides?
Spodosols
What is the primary factor that determines the texture of a soil?
Proportions of sand, silt, and clay
Which soil type is characterized by low fertility due to leaching and iron and aluminum accumulation?
Oxisols
What is a common feature of Vertisols?
Swelling when wet and shrinking when dry
Which soil type is formed in grasslands and is characterized by thick, dark, fertile soil?
Mollisols
Test your knowledge of soil science basics, including soil depth, temperature, and drainage. Learn about the factors that affect these important soil properties.
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