A soil has a thick black A horizon, a distinct B horizon, has reasonably stable soil structure, and was formed under grassland natural vegetation. In which suborder is it most likely classed?
A) aquents B) ustalfs C) cambids D) udolls E) udults
Question 2The nomenclature of Soil Taxonomy is characterized by all but which one of the following statements?
A) Soil names (except for series level) identifies major soil characteristics.
B) The names give a clear indication of the modes of genesis of the soil.
C) The names of the orders all end with the letters sols.
D) The names are based on measurable properties and not on presumed modes of genesis.
E) The subgroup name also tells you the great group, suborder, and order names.
Question 3Which of the following soil temperature regimes would provide the warmest and least variable soil temperatures?
A) Mesic
B) Hyperthermic
C) Thermic
D) Isohyperthermic
E) Isomeric
Question 4Which of the following diagnostic horizons would likely not restrict root growth in soils?
A) albic B) petrocalcic C) salic D) placic E) fragipan
Question 5Chemical weathering is accelerated by water, oxygen, and organic and inorganic acids moving down through the regolith.
Indicate whether the statement is true or false
Question 6Granite is an example of a(n) ________.
A) sedimentary rock
B) eolian parent material
C) secondary mineral
D) igneous rock
E) primary mineral
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