True/False
Indicate whether the
statement is true or false.
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1.
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Soil that has a depth of 40 inches or more is a deep soil.
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2.
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Imperfectly drained soils usually have mottles of gray, yellow, and
brown.
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3.
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There are 4 texture classes listed on the Ohio Land and Soil Conservation
Scorecard.
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4.
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Three feet of rise or fall in 50 ft. would be 3% slope.
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5.
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Sand is the largest of the primary soil particles with a diameter of
.002-.08mm.
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6.
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The color of the subsoil is the best indicator of air and water movement in the
subsoil.
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7.
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A clay pan is a hard dense layer in the topsoil.
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8.
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Plant roots require favorable balance of air and water for optimal
growth.
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9.
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Strip cropping and contour tillage should be used on uniform slopes of
6-18%.
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10.
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Permeability refers to the ability of a soil to evaporate water.
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11.
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Clay is sticky and plastic when moist and cannot be seen under an ordinary
microscope.
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12.
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Loamy soil contains sand.
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13.
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Organic matter improves soil aeration.
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14.
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No-till with crop residue should be used on class VI soils.
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15.
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Gully erosion channels are small enough to be covered by common tillage
tools.
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