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Exam 1 CSES 1010 Questions with Detailed
Verified Answers (100% Correct Answers)
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What is your definition of soil?
Ans: -"the surface material and/or organic layer of the earth that has
experienced some degree of physical, biological, and chemical weathering"
-unconsolidated material covering earth's surface
-contains mineral and organic components
-holds water
-supports living organisms
-changes with time (weathering)
-contains sand, silt and clay
Ultisols
Ans: These are the "ultimate" in soil formation. These are highly weathered,
acidic, low fertility soils typical of most of Alabama and the Southeastern U.S.
These soils support forests and long-lived perennials.
Mollisols
Ans: These are relatively young soils with a "mollic" or crumbly epipedon
(surface layer). They are generally formed in grasslands and are some of the
most agriculturally productive soils in the world. We have no Mollisols in
Alabama but they are extensive in Iowa, Nebraska, the Dakotas, Kansas and
Illinois.
Aridisols
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Ans: Arid soils. Soils that developed under very dry conditions and are usually
very high in soluble salts (e.g. Ca, Mg, K, and Na).
Inceptisols
Ans: "Inceptual soils" or very young soils with little soil profile development.
These are usually found on steep slopes or in river bottoms.
Entisols
Ans: Soils with little or no soil profile development. Many of these are deep
sands such as the sand hills of Nebraska or the Carolina Sand Hills or the
central ridge in Florida.
Spodisols
Ans: Soils with a "spodic" horizon (an organic layer within the soil profile.
Spodisols occur in coarse-textured (sandy) soils dominated by coniferous or
other vegetation that contributes large amounts of soluble organic acids to the
soil surface.
Histosols
Ans: Organic soils developed usually under wet conditions. "Hist" comes
from the root meaning "tissue". Found in the Florida Everglades south of Lake
Okeechobee and scattered in the northern U..S. and Canada. None in
Alabama.
Vertisols