Exam 19: Geographic Soils Information

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Which satellite image would be said to have the highest resolution?

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D

In making a second-order (detailed) soils map, soil scientists typically obtain most of the necessary soil profile information by using _____.

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A soil surveyor with knowledge of landscape/soil relationships can map the soils in a 100 ha watershed making far fewer auger holes than would be need for the same task by another soil surveyor who is not familiar with these relationships.

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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.

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If properly interpreted, the soil association map (generally a colored-keyed map) in a soil survey report is a good source of information for _____.

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Geographic information about soils addresses primarily changes in field soil properties in the vertical direction.

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A lithosequence is _______.

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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.

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Which of the following scale ratios represents the largest scale map?

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Highly trained soil scientists generally map a soil landscape by sampling the soil in ______.

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A 20 km long road would be a line __ cm long on a 1:200,000 scale map.

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In evaluating a site for a septic drainfield, an "undifferentiated group" mapping unit would be more helpful than a "soil complex" mapping unit.

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The information in a modern county soil survey report is generally used to _____ when designing a construction project.

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Remote sensing uses reflected radiation and therefore can directly sense differences in organic matter content of bare surface soils, but not differences in properties such as water content or iron oxide content.

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To constitute a soil association, a group of soils must all _____.

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Which of the following soil map units consists of the most severely eroded soils?

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Most United States county soil surveys are carried out at a ???___ order level of detail.

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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.

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Compared to a 50 x 100 cm county soils map, a 20 x 28 cm map of the United States would be considered to be a larger scale map.

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A soil profile description gives the value for soil properties such as color and texture averaged over the entire profile.

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