The strong buffering action in soils at pH 8.0 is due to the reactivity of:
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calcium carbonate
The flocculation and dispersion of colloids are related primarily to:
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kinds of cations absorbed on exchange sites
When water at the same temperature of a dry soil is applied to the soil, heat is
evolved because:
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water loses kinetic energy
The probability that the soil found at a specific location on the landscape is included
with the defined limits of the soil mapping unit is about:
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75%
Soils which support aerobic growth must contain:
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gaseous oxygen
The horizon that movement and accumulation of sodium is a microprocess essential
to the occurrence of is:
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Bn
The structure of a soil horizon is moderate, medium, granular. The structural size of
the horizon is:
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medium
In a soil, having a color of 10YR 4/1, the value is:
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4
10Y - hue
1 - chroma
The soil order formed under grass vegetation in a semi-arid to sub humid climate is
classified as a(n):
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Mollisol
, The conversion of ammonium to nitrate is a process called:
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nitrification
Soils having a pH less than 3.0 are likely to have:
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strong acids present
In the equation for soil losses due to wind erosion, E = f (I, K, C, L, V) the K is the:
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surface roughness factor
One of the more soluble and therefore, easily weathered minerals in acid soils is:
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calcite
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calcium carbonate
The flocculation and dispersion of colloids are related primarily to:
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kinds of cations absorbed on exchange sites
When water at the same temperature of a dry soil is applied to the soil, heat is
evolved because:
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water loses kinetic energy
The probability that the soil found at a specific location on the landscape is included
with the defined limits of the soil mapping unit is about:
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75%
Soils which support aerobic growth must contain:
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gaseous oxygen
The horizon that movement and accumulation of sodium is a microprocess essential
to the occurrence of is:
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Bn
The structure of a soil horizon is moderate, medium, granular. The structural size of
the horizon is:
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medium
In a soil, having a color of 10YR 4/1, the value is:
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4
10Y - hue
1 - chroma
The soil order formed under grass vegetation in a semi-arid to sub humid climate is
classified as a(n):
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Mollisol
, The conversion of ammonium to nitrate is a process called:
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nitrification
Soils having a pH less than 3.0 are likely to have:
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strong acids present
In the equation for soil losses due to wind erosion, E = f (I, K, C, L, V) the K is the:
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surface roughness factor
One of the more soluble and therefore, easily weathered minerals in acid soils is:
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calcite
