Exam 19: Geographic Soils Information

Soil mappers use a transect to find the boundaries between adjacent soils in a landscape.

A group of soils generally found together in a landscape uniform in parent material but differing in topography and drainage is called a ______.

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.

Modern county soil survey reports provide information on the suitability of soils for construction of such projects as sewage lagoons, roads and streets, and septic tank drainage fields.

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

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

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

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

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

Which of the following soil map units consists of the most nearly level land?

Soil Associations are usually used for large scale soils maps.

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.

In the United States, the government lead agency for most soil survey work is the _____.

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 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.

The mapping unit code, CeB3 indicates the soil in this unit consists of Land Capability Class III.

A stereo pair of air photos is particularly useful in studying _______ landscape features.