Exam 18: The Geography of Soils

Calcification is likely to occur

In terms of pedogenic regimes, the process that results in an accumulation of humus overlaying a thick, water saturated layer of clay in cold, wet climates with poor drainage conditions is

Relatively high precipitation in the regions in which these soils are found cause greater mineral alterations and more alluvial leaching than in other soils.

Soil structure can be defined as which of the following?

Rounded peds have ________ space between them than other peds, and are therefore ________ for plant growth.

Where would one likely find the deepest soil development?

Describe the NRCS Soil Taxonomy.

Which of the following is correct about the U.S. soil classification system?

List and briefly describe the various chemical properties used to differentiate soils.

A plant that is unable to extract needed water from soil has reached its

The organic rich horizon found at the top of the soil profile is the ________ horizon.

The horizon in which leached materials from other horizons is accumulated is the ________ horizon.

Describe and explain the distribution of soil orders across the United States.

These soils are the most spatially widespread, extending from the equator to high latitudes.

All organisms living in, on, and over the influence the organic content and chemical characteristics of soil.

________ are among the Earth's most agriculturally significant soils.

Soil science is an interdisciplinary study that incorporates aspects of physics, chemistry, biology, mineralogy, hydrology, taxonomy, climatology, and cartography. Briefly describe how these various fields may be beneficial to the study of soils.

A soil that is 40% sand, 40% silt, and 20% clay is classified as

Soil science is an interdisciplinary study, drawing on aspects of physics, chemistry, biology, mineralogy, hydrology, taxonomy, climatology, and cartography.

Histosols tend to be very dry soils found primarily in the world's arid regions.