True/False
Indicate whether the
statement is true or false.
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1.
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The “A” horizon contains the surface and subsurface layers.
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2.
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A slope of five percent is equal to a rise of five feet over a distance of 50
feet.
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3.
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Rill erosion is caused by water in a slightly concentrated flow running across
the landscape.
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4.
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Severe erosion has 25-75% subsoil material mixed in the plow layer or the upper
seven inches of original topsoil.
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5.
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Soil structure has the largest influence on the water and plant nutrient holding
capacity.
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6.
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Clayey soil textures contain 30% or more clay.
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7.
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Soils that are sandy throughout the profile are always well drained.
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8.
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Coarse sand or gravel is a root restrictive layer.
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9.
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Soil particles are grouped into three primary mineral or soil particle
sizes.
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10.
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Fragipans commonly have gray vertical seams and iron manganese oxide
stains.
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11.
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A shallow soil has 20 to 40 inches to a root restricting layer.
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12.
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A uniform brown, yellowish brown, or reddish brown color in the subsoil
indicates that the subsoil has had sufficient oxygen to highly oxidize the iron.
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13.
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A high water table can effect the drainage of a soil.
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14.
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The steep slope class has a slope range of 18 to 35%.
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15.
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Using a soil probe is a suitable method to observe soil properties.
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