Exam 19: Geographic Information About Soils
Exam 1: The Soils Around Us42 Questions
Exam 2: Formation of Soils From Parent Materials54 Questions
Exam 3: Soil Classification47 Questions
Exam 4: Soil Architecture and Physical Properties43 Questions
Exam 5: Soil Water: Characteristics and Behavior39 Questions
Exam 6: Soil and the Hydrologic Cycle45 Questions
Exam 7: Soil Aeration and Temperature41 Questions
Exam 8: The Colloidal Fraction: Seat of Soil Chemical and Physical Activity40 Questions
Exam 9: Soil Acidity42 Questions
Exam 10: Soils of Dry Regionsalkalinity,salinity and Sodicity41 Questions
Exam 11: Organisms and Ecology of the Soil41 Questions
Exam 12: Soil Organic Matter41 Questions
Exam 13: Nitrogen and Sulfur Economy of Soils42 Questions
Exam 14: Soil Phosphorus and Potassium39 Questions
Exam 15: Calcium,magnesium and Trace Elements41 Questions
Exam 16: Practical Nutrient Management37 Questions
Exam 17: Soil Erosion and Its Control42 Questions
Exam 18: Soils and Chemical Pollution41 Questions
Exam 19: Geographic Information About Soils39 Questions
Exam 20: Prospects for Global Soil Quality As Affected by Human Activities41 Questions
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Which of the following soil map units consists of the most severely eroded soils?
Free
(Multiple Choice)
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Correct Answer:
C
The mapping unit code,CeB3 indicates the soil in this unit consists of Land Capability Class III.
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(True/False)
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Correct Answer:
False
Soil mappers use a transect to find the boundaries between adjacent soils in a landscape.
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(True/False)
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Correct Answer:
True
A group of soils generally found together in a landscape uniform in parent material but differing in topography and drainage is called a ______.
(Multiple Choice)
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Most United States county soil surveys are carried out at a ???___ order level of detail.
(Multiple Choice)
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In making a second-order (detailed)soils map,soil scientists typically obtain most of the necessary soil profile information by using _____.
(Multiple Choice)
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As one walks down a drainage catena augering holes in the soils,one expects to find gray colors and mottles nearer to the soil surface.
(True/False)
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If a 20 ha field is mapped as being within a single soil consociation,a composite single soil sample can be expected to represent the correct level of available (soil test)phosphorus for at 85% of the field.
(True/False)
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Which of the following soil map units consists of the most nearly level land?
(Multiple Choice)
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A soil association is a group of soils found together in a landscape that may differ in minor ways,but must all belong to the same soil order.
(True/False)
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Web Soil Survey provides information on the suitability of soils for construction of such projects as sewage lagoons,roads and streets,and septic tank drainage fields.
(True/False)
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Soil profile descriptions as found in soil survey reports normally contain information about the color and texture of each horizon in the profile.
(True/False)
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In the United States,the government lead agency for most soil survey work is the _____.
(Multiple Choice)
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A 20 km long road would be a line __ cm long on a 1:200,000 scale map.
(Multiple Choice)
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For most planning projects using a geographic information system,getting the needed data into the system is the easy part,but developing the computer Tables and maps is extremely time-consuming and difficult.
(True/False)
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Which of the following scale ratios represents the largest scale map?
(Multiple Choice)
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A soil profile description gives the value for soil properties such as color and texture averaged over the entire profile.
(True/False)
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A stereo pair of air photos is particularly useful in studying _______ landscape features.
(Multiple Choice)
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