Exam 19: Geographic Information About Soils

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.

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.

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

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

In which type of mapping unit are the various constituent parts most closely similar to each other?

If a developing country signed a two-year contract with a private soil science firm to make a soil survey of the entire country (about 1 million square kilometers),the survey stipulated would likely be a first or second order survey.

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

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

In a profile description,soil horizons are normally labeled as #1,#2,#3,starting at the bottom of the profile.

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

In which of the following systems are space satellites used to collect geographic information about soils?

To be effective a geo positioning system receiver must be in contact with at least two different satellites at the same time.

Precision fertilizer applications systems take into consideration the different fertility levels within an agricultural field and integrate the use of soil testing with _______.

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

Which of the following could likely be a "layer" of information in a GIS?

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.

The various soils in a catena of soils differ from one another primarily as a result of their geologic parent material.

The map unit "152C2" indicates that the soils in this complex have two types of C horizons.

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