soil profile - savannah grasslands

Where are savannahs found?

• Tropical regions like Africa

• Temperate regions like Europe

• Polar regions like the Arctic

• Lunar regions like the moon

Savannahs are home to large herds of grazing animals and the predators that hunt them. Which of these animals DO NOT graze in the savannah?

• Antelopes

• Elephants

• Kangaroos

• Coyotes

What gives savannah soils their reddish colour?

• High organic matter content

• High iron content

• High clay content

• High sand content

Which best explains the rapid drainage in savanna soils?

• • High clay content and low porosity

• • High sand content and high porosity

• • Compacted soil layers and low permeability

• • High organic matter content and good aggregation

Where are most of the nutrients in a savanna ecosystem stored?

• In the soil

• In the atmosphere

• In the aboveground biomass (plants)

• In underground water reserves

Savanna soils are usually

• Alkaline

• Acidic

• Basic

• Saline

Which is the most important role in the long-term development of nutrient-poor and acidic savanna soils?

• Frequent fires

• High rainfall and weathering of parent rock

• Overgrazing by herbivores

• A lack of decomposers in the soil

Which of the following best describes the humus layer in savanna soils?

• Thin and relatively low in organic matter

• Thick and rich in organic matter

• Absent due to rapid decomposition

• Highly acidic and poorly decomposed

Which process is least likely to contribute to soil degradation in savannas?

• Overgrazing

• Single crop farming (monoculture farming)

• Deforestation

• Sustainable grazing practices

What is the function of a bedrock?

• Source of nitrogen

• It is impermeable, allowing for better absorption

• Regulates surface water runoff

• Primary source of nutrients for plant growth