Exam 16: Soils

The soil with the highest cation exchange capacity will have

The primary difference between the O and A horizons is that the O horizon usually has

The most common soil type on Earth is

In the diagram below, horizonation has begun in which image?

Which of the following is not a function that organic matter serves in soil?

The primary source of nutrients for plants is found in the ___ horizon.

Compared with Mollisols, Alfisols tend to be somewhat

In the diagram below, the yellow area represents

The soil shown in the photograph below has a greenish or grayish tint, which may mean that

Soils that are most likely to be compacted have

Which of the following is not true of soil texture?

Podzolization is most likely to occur in the ___ horizon.

Clay soils will usually have a higher cation exchange capacity than sandy soils because

In the diagram below, regolith forms in which area?

Vertisols, Aridisols, Oxisols, and Ultisols all have in common that they

In the soil profile below, iron is present in both the top and bottom later, as labeled, but why is only the second layer a reddish color?

The use of strip cropping helps to control soil erosion by

The most direct and fundamental relationship between overgrazing and soil erosion is that

The soil pictured below is

In the world map below, the color that represents soils that are least mature is