Soils

Question 1

A measure of the hydrogen ion concentration in the soil. Values greater than 7.0 are alkaline and values less than 7.0 are acid.

Answer 1

Acidity

Question 2

Where plant roots help to break up the soil and parents rock.

Answer 2

Biological weathering

Question 3

Transfer upwards of minerals through the soil horizons caused by evaporation loss at the surface.

Answer 3

Capillary action

Question 4

Downward washing by rainwater of soluble ions in solution. Occurs in areas where there is excessive rainfall.

Answer 4

Leaching

Question 5

The leaching of small suspended soil particles in infiltrating water from the A horizon.

Answer 5

Eluviation

Question 6

The deposition is leached or eluvial particles into the B horizon.

Answer 6

Illuviation

Question 7

Acid humus formed by the decaying of pine needles.

Answer 7

Mor humus

Question 8

Soft, blackish organic matter formed by the decaying of deciduous leaves.

Answer 8

Mull humus