SOIL PROCESSES

Multiple Choice

This process breaks down rocks by means of physical and chemical weathering of minerals to determine texture and rate of nutrient release.

• Humification

• Weathering

• Calcification

• Laterization

Multiple Choice

..... (occurs in A Horizon) is the downward movement or the physical down washing of small particles such as clay and humus from the upper layer of the soil to the lower layer by downward precipitation.

• Humification

• Illuviation

• Eluviation

• Laterization

Multiple Choice

..... is the process by which organic matter is decomposed to form humus with the aid of bacteria and fungi

• Humification

• Illuviation

• Cheluviation

• Podzolization

Multiple Choice

In this process, soil components are moved in any form or direction with the influence of moisture

• Translocation

• Illuviation

• Eluviation

• Podzolization

Multiple Choice

In the process of _____________, soluble materials are removed especially when precipitation exceeds evapotranspiration rates.

• Deposition

• Leaching

• Moveumics

• Mull

Multiple Choice

...is the process by which calcium or carbonate minerals are removed from the soil

• Decalcification

• Gleying

• Weathering

• Laterization

Multiple Choice

....occurs in the hot, rainy tropics where chemical weathering proceeds at a rapid rate, and usually gives a deep red soil colour.

• Calcification

• Gleying

• Humification

• Laterization

Multiple Choice

....occurs when the output of water from the soil is restricted, thus, giving anaerobic or waterlogged conditions

• Calcification

• Gleying

• Decalcification

• Laterization